QA-002

Room-Tests

app/src/androidTest/java/de/medapp/wunddoku/data/dao/BlockAndCheckItemDaoTest.kt

@@ -0,0 +1,259 @@
+package de.medapp.wunddoku.data.dao
+
+import android.database.sqlite.SQLiteConstraintException
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.blockStateEntity
+import de.medapp.wunddoku.testutil.checkItemStateEntity
+import de.medapp.wunddoku.testutil.expectThrows
+import de.medapp.wunddoku.testutil.runDbTest
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/** DAO-Tests für [BlockStateDao] und [CheckItemStateDao]. */
+class BlockAndCheckItemDaoTest : RoomTestBase() {
+
+    // --- BlockStateDao -------------------------------------------------------------------
+
+    @Test
+    fun blockStates_insertAll_und_getById_liefern_alle_felder() = runDbTest {
+        seedDocumentation()
+        val block = blockStateEntity(title = "Größe & Tiefe", order = 3, updatedAt = 4_000L)
+
+        blockStateDao.insertAll(listOf(block))
+
+        assertEquals(block, blockStateDao.getById("b-1"))
+        assertNull(blockStateDao.getById("unbekannt"))
+    }
+
+    @Test
+    fun blockStates_getForDocumentation_sortiert_nach_blockOrder_und_filtert_nach_dokumentation() = runDbTest {
+        seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+        blockStateDao.insertAll(
+            listOf(
+                blockStateEntity(id = "b-3", documentationId = "d-1", blockDefinitionId = "c", order = 3),
+                blockStateEntity(id = "b-1", documentationId = "d-1", blockDefinitionId = "a", order = 1),
+                blockStateEntity(id = "b-2", documentationId = "d-1", blockDefinitionId = "b", order = 2),
+                blockStateEntity(id = "b-x", documentationId = "d-2", blockDefinitionId = "a", order = 1),
+            )
+        )
+
+        assertEquals(listOf("b-1", "b-2", "b-3"), blockStateDao.getForDocumentation("d-1").map { it.id })
+        assertEquals(listOf("b-x"), blockStateDao.getForDocumentation("d-2").map { it.id })
+        assertTrue(blockStateDao.getForDocumentation("unbekannt").isEmpty())
+    }
+
+    @Test
+    fun blockStates_gleiche_blockdefinition_in_derselben_dokumentation_ist_verboten() = runDbTest {
+        seedDocumentation()
+        blockStateDao.insertAll(listOf(blockStateEntity(id = "b-1", blockDefinitionId = "wundart")))
+
+        expectThrows<SQLiteConstraintException> {
+            blockStateDao.insertAll(listOf(blockStateEntity(id = "b-2", blockDefinitionId = "wundart")))
+        }
+
+        assertEquals(1, countRows("block_states"))
+    }
+
+    @Test
+    fun blockStates_gleiche_blockdefinition_in_verschiedenen_dokumentationen_ist_erlaubt() = runDbTest {
+        seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+
+        blockStateDao.insertAll(
+            listOf(
+                blockStateEntity(id = "b-1", documentationId = "d-1", blockDefinitionId = "wundart"),
+                blockStateEntity(id = "b-2", documentationId = "d-2", blockDefinitionId = "wundart"),
+            )
+        )
+
+        assertEquals(2, countRows("block_states"))
+    }
+
+    @Test
+    fun blockStates_mit_unbekannter_dokumentation_wirft() = runDbTest {
+        expectThrows<SQLiteConstraintException> {
+            blockStateDao.insertAll(listOf(blockStateEntity(documentationId = "gibt-es-nicht")))
+        }
+
+        assertEquals(0, countRows("block_states"))
+    }
+
+    @Test
+    fun blockStates_insertAll_mit_leerer_liste_ist_unkritisch() = runDbTest {
+        blockStateDao.insertAll(emptyList())
+
+        assertEquals(0, countRows("block_states"))
+    }
+
+    // --- CheckItemStateDao ---------------------------------------------------------------
+
+    private suspend fun seedBlock(id: String = "b-1", documentationId: String = "d-1", definitionId: String = "wundart") {
+        if (documentationDao.getById(documentationId) == null) seedDocumentation(id = documentationId)
+        blockStateDao.insertAll(listOf(blockStateEntity(id = id, documentationId = documentationId, blockDefinitionId = definitionId)))
+    }
+
+    @Test
+    fun checkItems_insertAll_und_getForBlockState_liefern_alle_felder_inklusive_standardwerten() = runDbTest {
+        seedBlock()
+        val plain = checkItemStateEntity(id = "c-1", definitionId = "plain", order = 1)
+        val full = checkItemStateEntity(
+            id = "c-2", definitionId = "full", order = 2, checked = true, isFreeText = true,
+            freeTextValue = "Text", isStaticHint = false, inputSpec = "SPEC",
+        )
+
+        checkItemStateDao.insertAll(listOf(plain, full))
+
+        val loaded = checkItemStateDao.getForBlockState("b-1")
+        assertEquals(listOf(plain, full), loaded)
+        assertFalse(loaded[0].checked)
+        assertFalse(loaded[0].isFreeText)
+        assertEquals("", loaded[0].freeTextValue)
+        assertFalse(loaded[0].isStaticHint)
+        assertEquals("", loaded[0].inputSpec)
+    }
+
+    @Test
+    fun checkItems_getForBlockState_sortiert_nach_itemOrder_und_filtert_nach_block() = runDbTest {
+        seedBlock(id = "b-1", definitionId = "a")
+        seedBlock(id = "b-2", definitionId = "b")
+        checkItemStateDao.insertAll(
+            listOf(
+                checkItemStateEntity(id = "c-3", blockStateId = "b-1", definitionId = "z", order = 3),
+                checkItemStateEntity(id = "c-1", blockStateId = "b-1", definitionId = "x", order = 1),
+                checkItemStateEntity(id = "c-2", blockStateId = "b-1", definitionId = "y", order = 2),
+                checkItemStateEntity(id = "c-x", blockStateId = "b-2", definitionId = "x", order = 1),
+            )
+        )
+
+        assertEquals(listOf("c-1", "c-2", "c-3"), checkItemStateDao.getForBlockState("b-1").map { it.id })
+        assertEquals(listOf("c-x"), checkItemStateDao.getForBlockState("b-2").map { it.id })
+        assertTrue(checkItemStateDao.getForBlockState("unbekannt").isEmpty())
+    }
+
+    @Test
+    fun checkItems_setChecked_setzt_und_entfernt_den_haken_ohne_andere_felder_zu_aendern() = runDbTest {
+        seedBlock()
+        val item = checkItemStateEntity(freeTextValue = "bleibt", inputSpec = "bleibt auch")
+        checkItemStateDao.insertAll(listOf(item))
+
+        checkItemStateDao.setChecked("c-1", true)
+        assertEquals(item.copy(checked = true), checkItemStateDao.getForBlockState("b-1").single())
+
+        checkItemStateDao.setChecked("c-1", false)
+        assertEquals(item, checkItemStateDao.getForBlockState("b-1").single())
+    }
+
+    @Test
+    fun checkItems_setChecked_betrifft_nur_die_angegebene_option() = runDbTest {
+        seedBlock()
+        checkItemStateDao.insertAll(
+            listOf(
+                checkItemStateEntity(id = "c-1", definitionId = "a", order = 1),
+                checkItemStateEntity(id = "c-2", definitionId = "b", order = 2),
+            )
+        )
+
+        checkItemStateDao.setChecked("c-1", true)
+
+        val byId = checkItemStateDao.getForBlockState("b-1").associateBy { it.id }
+        assertTrue(byId.getValue("c-1").checked)
+        assertFalse(byId.getValue("c-2").checked)
+    }
+
+    @Test
+    fun checkItems_setChecked_und_updateFreeTextValue_mit_unbekannter_id_sind_wirkungslos() = runDbTest {
+        seedBlock()
+        val item = checkItemStateEntity()
+        checkItemStateDao.insertAll(listOf(item))
+
+        checkItemStateDao.setChecked("unbekannt", true)
+        checkItemStateDao.updateFreeTextValue("unbekannt", "x")
+
+        assertEquals(listOf(item), checkItemStateDao.getForBlockState("b-1"))
+    }
+
+    @Test
+    fun checkItems_updateFreeTextValue_aendert_nur_den_text_und_nicht_den_haken() = runDbTest {
+        seedBlock()
+        checkItemStateDao.insertAll(listOf(checkItemStateEntity(isFreeText = true, checked = true)))
+
+        checkItemStateDao.updateFreeTextValue("c-1", "Rötung am Wundrand")
+
+        val loaded = checkItemStateDao.getForBlockState("b-1").single()
+        assertEquals("Rötung am Wundrand", loaded.freeTextValue)
+        assertTrue(loaded.checked)
+        assertTrue(loaded.isFreeText)
+    }
+
+    @Test
+    fun checkItems_freitext_laesst_sich_leeren() = runDbTest {
+        seedBlock()
+        checkItemStateDao.insertAll(listOf(checkItemStateEntity(isFreeText = true, freeTextValue = "alt")))
+
+        checkItemStateDao.updateFreeTextValue("c-1", "")
+
+        assertEquals("", checkItemStateDao.getForBlockState("b-1").single().freeTextValue)
+    }
+
+    @Test
+    fun checkItems_sonderzeichen_und_sql_fragmente_werden_als_reiner_text_gespeichert() = runDbTest {
+        seedBlock()
+        checkItemStateDao.insertAll(listOf(checkItemStateEntity(isFreeText = true)))
+        val text = "O'Brien \"Test\" ; DROP TABLE patients; -- Größe 3,5 × 2 cm\nzweite Zeile\t😀 100% _x_"
+
+        checkItemStateDao.updateFreeTextValue("c-1", text)
+
+        assertEquals(text, checkItemStateDao.getForBlockState("b-1").single().freeTextValue)
+        assertEquals(1, countRows("patients")) // Tabelle existiert weiterhin, der Seed-Patient ist unangetastet
+    }
+
+    @Test
+    fun checkItems_inputSpec_mit_steuerzeichen_der_codierung_bleibt_verlustfrei_erhalten() = runDbTest {
+        // InputSpecCodec nutzt \u001E, \u001F und \u001D als Trennzeichen.
+        seedBlock()
+        val spec = "tpl\u001EN\u001Flabel\u001F3\u001Dx\u001Ey"
+        checkItemStateDao.insertAll(listOf(checkItemStateEntity(inputSpec = spec)))
+
+        assertEquals(spec, checkItemStateDao.getForBlockState("b-1").single().inputSpec)
+    }
+
+    @Test
+    fun checkItems_gleiche_optionsdefinition_im_selben_block_ist_verboten() = runDbTest {
+        seedBlock()
+        checkItemStateDao.insertAll(listOf(checkItemStateEntity(id = "c-1", definitionId = "dup")))
+
+        expectThrows<SQLiteConstraintException> {
+            checkItemStateDao.insertAll(listOf(checkItemStateEntity(id = "c-2", definitionId = "dup")))
+        }
+
+        assertEquals(1, countRows("check_item_states"))
+    }
+
+    @Test
+    fun checkItems_gleiche_optionsdefinition_in_verschiedenen_bloecken_ist_erlaubt() = runDbTest {
+        seedBlock(id = "b-1", definitionId = "a")
+        seedBlock(id = "b-2", definitionId = "b")
+
+        checkItemStateDao.insertAll(
+            listOf(
+                checkItemStateEntity(id = "c-1", blockStateId = "b-1", definitionId = "same"),
+                checkItemStateEntity(id = "c-2", blockStateId = "b-2", definitionId = "same"),
+            )
+        )
+
+        assertEquals(2, countRows("check_item_states"))
+    }
+
+    @Test
+    fun checkItems_mit_unbekanntem_block_wirft() = runDbTest {
+        expectThrows<SQLiteConstraintException> {
+            checkItemStateDao.insertAll(listOf(checkItemStateEntity(blockStateId = "gibt-es-nicht")))
+        }
+
+        assertEquals(0, countRows("check_item_states"))
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/dao/DocumentationDaoTest.kt

@@ -0,0 +1,222 @@
+package de.medapp.wunddoku.data.dao
+
+import android.database.sqlite.SQLiteConstraintException
+import de.medapp.wunddoku.domain.model.DocumentationStatus
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.awaitMatching
+import de.medapp.wunddoku.testutil.documentationEntity
+import de.medapp.wunddoku.testutil.expectThrows
+import de.medapp.wunddoku.testutil.runDbTest
+import kotlinx.coroutines.async
+import kotlinx.coroutines.flow.first
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/** DAO-Tests für [DocumentationDao] (ohne Suche und Relationen, s. SearchQueryTest / DocumentationRelationsTest). */
+class DocumentationDaoTest : RoomTestBase() {
+
+    // --- insert / getById ----------------------------------------------------------------
+
+    @Test
+    fun insert_und_getById_liefern_alle_felder_inklusive_snapshots() = runDbTest {
+        seedPatient()
+        val entity = documentationEntity(
+            status = DocumentationStatus.COMPLETED,
+            createdAt = 1_000L,
+            updatedAt = 2_000L,
+            pdfLastGeneratedAt = 3_000L,
+            catalogVersion = 3,
+            firstNameSnapshot = "Erika",
+            lastNameSnapshot = "Musterfrau",
+            birthDateSnapshot = "1975-12-01",
+            streetSnapshot = "Hauptstraße 5",
+            postalCodeSnapshot = "54321",
+            citySnapshot = "Beispielstadt",
+        )
+
+        documentationDao.insert(entity)
+
+        assertEquals(entity, documentationDao.getById("d-1"))
+    }
+
+    @Test
+    fun nullable_felder_bleiben_null() = runDbTest {
+        seedDocumentation()
+
+        val loaded = documentationDao.getById("d-1")!!
+
+        assertNull(loaded.continuedFromDocumentationId)
+        assertNull(loaded.pdfLastGeneratedAt)
+    }
+
+    @Test
+    fun getById_liefert_null_fuer_unbekannte_id() = runDbTest {
+        assertNull(documentationDao.getById("unbekannt"))
+    }
+
+    @Test
+    fun status_wird_als_enum_name_gespeichert_und_vollstaendig_zurueckgelesen() = runDbTest {
+        seedPatient()
+        DocumentationStatus.values().forEachIndexed { index, status ->
+            documentationDao.insert(documentationEntity(id = "d-$index", status = status))
+        }
+
+        DocumentationStatus.values().forEachIndexed { index, status ->
+            assertEquals(status, documentationDao.getById("d-$index")!!.status)
+            assertEquals(status.name, queryString("SELECT status FROM documentations WHERE id = 'd-$index'"))
+        }
+    }
+
+    // --- Foreign Keys --------------------------------------------------------------------
+
+    @Test
+    fun insert_mit_unbekanntem_patienten_wirft() = runDbTest {
+        expectThrows<SQLiteConstraintException> {
+            documentationDao.insert(documentationEntity(patientId = "gibt-es-nicht"))
+        }
+
+        assertEquals(0, countRows("documentations"))
+    }
+
+    @Test
+    fun insert_mit_unbekannter_fortsetzungsquelle_wirft() = runDbTest {
+        seedPatient()
+
+        expectThrows<SQLiteConstraintException> {
+            documentationDao.insert(documentationEntity(continuedFromDocumentationId = "gibt-es-nicht"))
+        }
+
+        assertEquals(0, countRows("documentations"))
+    }
+
+    @Test
+    fun fortsetzungsquelle_wird_beim_loeschen_der_quelle_auf_null_gesetzt() = runDbTest {
+        val source = seedDocumentation(id = "d-source")
+        documentationDao.insert(documentationEntity(id = "d-copy", continuedFromDocumentationId = "d-source"))
+        assertEquals("d-source", documentationDao.getById("d-copy")!!.continuedFromDocumentationId)
+
+        documentationDao.delete(source)
+
+        assertNull(documentationDao.getById("d-source"))
+        val copy = documentationDao.getById("d-copy")
+        assertNotNull("Die Fortsetzung darf nicht mitgelöscht werden", copy)
+        assertNull(copy!!.continuedFromDocumentationId)
+    }
+
+    // --- update / delete -----------------------------------------------------------------
+
+    @Test
+    fun update_aendert_nur_die_uebergebene_dokumentation() = runDbTest {
+        val first = seedDocumentation(id = "d-1")
+        val second = seedDocumentation(id = "d-2")
+
+        documentationDao.update(first.copy(status = DocumentationStatus.COMPLETED, updatedAt = 9_000L, pdfLastGeneratedAt = 9_500L))
+
+        val changed = documentationDao.getById("d-1")!!
+        assertEquals(DocumentationStatus.COMPLETED, changed.status)
+        assertEquals(9_000L, changed.updatedAt)
+        assertEquals(9_500L, changed.pdfLastGeneratedAt)
+        assertEquals(second, documentationDao.getById("d-2"))
+    }
+
+    @Test
+    fun update_einer_unbekannten_id_legt_nichts_an() = runDbTest {
+        seedPatient()
+
+        documentationDao.update(documentationEntity(id = "geist"))
+
+        assertNull(documentationDao.getById("geist"))
+    }
+
+    @Test
+    fun delete_entfernt_nur_die_uebergebene_dokumentation_und_laesst_den_patienten_bestehen() = runDbTest {
+        val first = seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+
+        documentationDao.delete(first)
+
+        assertNull(documentationDao.getById("d-1"))
+        assertNotNull(documentationDao.getById("d-2"))
+        assertNotNull(patientDao.getById("p-1"))
+    }
+
+    // --- observeAll / countForPatient ----------------------------------------------------
+
+    @Test
+    fun observeAll_sortiert_nach_erstelldatum_absteigend() = runDbTest {
+        seedDocumentation(id = "d-alt", createdAt = 1_000L)
+        seedDocumentation(id = "d-neu", createdAt = 3_000L)
+        seedDocumentation(id = "d-mitte", createdAt = 2_000L)
+
+        val ids = documentationDao.observeAll().first().map { it.id }
+
+        assertEquals(listOf("d-neu", "d-mitte", "d-alt"), ids)
+    }
+
+    @Test
+    fun observeAll_liefert_leere_liste_ohne_dokumentationen() = runDbTest {
+        assertTrue(documentationDao.observeAll().first().isEmpty())
+    }
+
+    @Test
+    fun observeAll_aktualisiert_sich_bei_insert_update_und_delete() = runDbTest {
+        seedPatient()
+
+        val afterInsert = async { documentationDao.observeAll().awaitMatching { it.size == 1 } }
+        val entity = documentationEntity(id = "d-1")
+        documentationDao.insert(entity)
+        assertEquals("d-1", afterInsert.await().single().id)
+
+        val afterUpdate = async {
+            documentationDao.observeAll().awaitMatching { list -> list.singleOrNull()?.status == DocumentationStatus.COMPLETED }
+        }
+        documentationDao.update(entity.copy(status = DocumentationStatus.COMPLETED))
+        afterUpdate.await()
+
+        val afterDelete = async { documentationDao.observeAll().awaitMatching { it.isEmpty() } }
+        documentationDao.delete(entity)
+        assertTrue(afterDelete.await().isEmpty())
+    }
+
+    @Test
+    fun countForPatient_zaehlt_nur_dokumentationen_des_jeweiligen_patienten() = runDbTest {
+        seedDocumentation(id = "d-1", patientId = "p-1")
+        seedDocumentation(id = "d-2", patientId = "p-1")
+        seedDocumentation(id = "d-3", patientId = "p-2")
+
+        assertEquals(2, documentationDao.countForPatient("p-1"))
+        assertEquals(1, documentationDao.countForPatient("p-2"))
+        assertEquals(0, documentationDao.countForPatient("unbekannt"))
+    }
+
+    // --- getLatestForPatient -------------------------------------------------------------
+
+    @Test
+    fun getLatestForPatient_liefert_die_zuletzt_erstellte_dokumentation_des_patienten() = runDbTest {
+        seedDocumentation(id = "d-alt", patientId = "p-1", createdAt = 1_000L)
+        seedDocumentation(id = "d-neu", patientId = "p-1", createdAt = 3_000L)
+        seedDocumentation(id = "d-mitte", patientId = "p-1", createdAt = 2_000L)
+
+        assertEquals("d-neu", documentationDao.getLatestForPatient("p-1")?.documentation?.id)
+    }
+
+    @Test
+    fun getLatestForPatient_ignoriert_dokumentationen_anderer_patienten() = runDbTest {
+        seedDocumentation(id = "d-1", patientId = "p-1", createdAt = 1_000L)
+        seedDocumentation(id = "d-2", patientId = "p-2", createdAt = 9_000L)
+
+        assertEquals("d-1", documentationDao.getLatestForPatient("p-1")?.documentation?.id)
+        assertEquals("d-2", documentationDao.getLatestForPatient("p-2")?.documentation?.id)
+    }
+
+    @Test
+    fun getLatestForPatient_liefert_null_ohne_dokumentation() = runDbTest {
+        seedPatient()
+
+        assertNull(documentationDao.getLatestForPatient("p-1"))
+        assertNull(documentationDao.getLatestForPatient("unbekannt"))
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/dao/DocumentationRelationsTest.kt

@@ -0,0 +1,229 @@
+package de.medapp.wunddoku.data.dao
+
+import de.medapp.wunddoku.data.entity.relations.DocumentationWithDetails
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.blockStateEntity
+import de.medapp.wunddoku.testutil.checkItemStateEntity
+import de.medapp.wunddoku.testutil.photoEntity
+import de.medapp.wunddoku.testutil.runDbTest
+import de.medapp.wunddoku.testutil.signatureEntity
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * Relationstests (QA-002): [DocumentationWithDetails] (Dokumentation -> Blöcke -> Optionen,
+ * Fotos, Signaturen) sowie Cascade-/Restrict-Verhalten der Foreign Keys.
+ */
+class DocumentationRelationsTest : RoomTestBase() {
+
+    /**
+     * Dokumentation [docId] mit 2 Blöcken ("<prefix>-b1" order 2, "<prefix>-b2" order 1),
+     * 3 Optionen (b1: c1, c2 / b2: c3), 2 Fotos und 2 Signaturen.
+     */
+    private suspend fun seedWithChildren(docId: String, createdAt: Long, prefix: String) {
+        seedDocumentation(id = docId, patientId = "p-1", createdAt = createdAt)
+        blockStateDao.insertAll(
+            listOf(
+                blockStateEntity(id = "$prefix-b1", documentationId = docId, blockDefinitionId = "wundart", order = 2),
+                blockStateEntity(id = "$prefix-b2", documentationId = docId, blockDefinitionId = "groesse", order = 1),
+            )
+        )
+        checkItemStateDao.insertAll(
+            listOf(
+                checkItemStateEntity(id = "$prefix-c1", blockStateId = "$prefix-b1", definitionId = "a", order = 1),
+                checkItemStateEntity(id = "$prefix-c2", blockStateId = "$prefix-b1", definitionId = "b", order = 2),
+                checkItemStateEntity(id = "$prefix-c3", blockStateId = "$prefix-b2", definitionId = "a", order = 1),
+            )
+        )
+        photoDao.insert(photoEntity(id = "$prefix-ph1", documentationId = docId, orderIndex = 0))
+        photoDao.insert(photoEntity(id = "$prefix-ph2", documentationId = docId, orderIndex = 1))
+        signatureDao.insert(signatureEntity(id = "$prefix-s1", documentationId = docId, orderIndex = 0))
+        signatureDao.insert(signatureEntity(id = "$prefix-s2", documentationId = docId, orderIndex = 1))
+    }
+
+    private fun DocumentationWithDetails.itemIdsByBlock(): Map<String, Set<String>> =
+        blocks.associate { it.blockState.id to it.checkItems.map { item -> item.id }.toSet() }
+
+    // --- Laden ---------------------------------------------------------------------------
+
+    @Test
+    fun getFullDocumentation_liefert_dokumentation_mit_allen_kindern() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+
+        val full = documentationDao.getFullDocumentation("d-a")!!
+
+        assertEquals("d-a", full.documentation.id)
+        assertEquals(setOf("a-b1", "a-b2"), full.blocks.map { it.blockState.id }.toSet())
+        assertEquals(setOf("a-ph1", "a-ph2"), full.photos.map { it.id }.toSet())
+        assertEquals(setOf("a-s1", "a-s2"), full.signatures.map { it.id }.toSet())
+    }
+
+    @Test
+    fun jede_option_haengt_am_richtigen_block() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+
+        val full = documentationDao.getFullDocumentation("d-a")!!
+
+        assertEquals(
+            mapOf("a-b1" to setOf("a-c1", "a-c2"), "a-b2" to setOf("a-c3")),
+            full.itemIdsByBlock(),
+        )
+    }
+
+    @Test
+    fun relation_enthaelt_die_vollstaendigen_entities_nicht_nur_ids() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+
+        val full = documentationDao.getFullDocumentation("d-a")!!
+
+        assertEquals(documentationDao.getById("d-a"), full.documentation)
+        assertEquals(blockStateDao.getById("a-b1"), full.blocks.single { it.blockState.id == "a-b1" }.blockState)
+        assertEquals(photoDao.getById("a-ph1"), full.photos.single { it.id == "a-ph1" })
+        assertEquals(signatureDao.getById("a-s1"), full.signatures.single { it.id == "a-s1" })
+        assertEquals(
+            checkItemStateDao.getForBlockState("a-b1"),
+            full.blocks.single { it.blockState.id == "a-b1" }.checkItems.sortedBy { it.itemOrder },
+        )
+    }
+
+    @Test
+    fun relation_vermischt_keine_daten_verschiedener_dokumentationen() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+        seedWithChildren("d-b", 2_000L, "b")
+
+        val a = documentationDao.getFullDocumentation("d-a")!!
+        val b = documentationDao.getFullDocumentation("d-b")!!
+
+        assertTrue(a.blocks.all { it.blockState.documentationId == "d-a" })
+        assertTrue(a.photos.all { it.documentationId == "d-a" })
+        assertTrue(a.signatures.all { it.documentationId == "d-a" })
+        assertEquals(setOf("a-c1", "a-c2", "a-c3"), a.itemIdsByBlock().values.flatten().toSet())
+        assertEquals(setOf("b-c1", "b-c2", "b-c3"), b.itemIdsByBlock().values.flatten().toSet())
+    }
+
+    @Test
+    fun dokumentation_ohne_kinder_liefert_leere_listen_statt_null() = runDbTest {
+        seedDocumentation(id = "d-leer")
+
+        val full = documentationDao.getFullDocumentation("d-leer")!!
+
+        assertTrue(full.blocks.isEmpty())
+        assertTrue(full.photos.isEmpty())
+        assertTrue(full.signatures.isEmpty())
+    }
+
+    @Test
+    fun block_ohne_optionen_liefert_leere_optionsliste() = runDbTest {
+        seedDocumentation()
+        blockStateDao.insertAll(listOf(blockStateEntity()))
+
+        val block = documentationDao.getFullDocumentation("d-1")!!.blocks.single()
+
+        assertTrue(block.checkItems.isEmpty())
+    }
+
+    @Test
+    fun getFullDocumentation_liefert_null_fuer_unbekannte_id() = runDbTest {
+        assertNull(documentationDao.getFullDocumentation("unbekannt"))
+    }
+
+    @Test
+    fun getLatestForPatient_laedt_auch_die_kinder_der_neuesten_dokumentation() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+        seedWithChildren("d-b", 2_000L, "b")
+
+        val latest = documentationDao.getLatestForPatient("p-1")!!
+
+        assertEquals("d-b", latest.documentation.id)
+        assertEquals(setOf("b-b1", "b-b2"), latest.blocks.map { it.blockState.id }.toSet())
+        assertEquals(setOf("b-c1", "b-c2", "b-c3"), latest.itemIdsByBlock().values.flatten().toSet())
+        assertEquals(2, latest.photos.size)
+        assertEquals(2, latest.signatures.size)
+    }
+
+    @Test
+    fun grosse_dokumentation_wird_vollstaendig_und_korrekt_zugeordnet_geladen() = runDbTest {
+        seedDocumentation()
+        val blocks = (1..25).map { b ->
+            blockStateEntity(id = "b-$b", blockDefinitionId = "block_$b", title = "Block $b", order = b)
+        }
+        blockStateDao.insertAll(blocks)
+        val items = (1..25).flatMap { b ->
+            (1..20).map { i ->
+                checkItemStateEntity(id = "c-$b-$i", blockStateId = "b-$b", definitionId = "item_$i", order = i)
+            }
+        }
+        checkItemStateDao.insertAll(items)
+
+        val full = documentationDao.getFullDocumentation("d-1")!!
+
+        assertEquals(25, full.blocks.size)
+        assertEquals(500, full.blocks.sumOf { it.checkItems.size })
+        for (block in full.blocks) {
+            assertEquals(20, block.checkItems.size)
+            assertTrue(block.checkItems.all { it.blockStateId == block.blockState.id })
+        }
+    }
+
+    // --- Cascade / Restrict --------------------------------------------------------------
+
+    @Test
+    fun foreign_keys_sind_in_der_testdatenbank_aktiviert() = runDbTest {
+        assertEquals(1, queryInt("PRAGMA foreign_keys"))
+    }
+
+    @Test
+    fun dokumentation_loeschen_entfernt_bloecke_optionen_fotos_und_signaturen_per_cascade() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+
+        documentationDao.delete(documentationDao.getById("d-a")!!)
+
+        assertEquals(0, countRows("documentations"))
+        assertEquals(0, countRows("block_states"))
+        assertEquals(0, countRows("check_item_states"))
+        assertEquals(0, countRows("photos"))
+        assertEquals(0, countRows("signatures"))
+    }
+
+    @Test
+    fun dokumentation_loeschen_laesst_patient_und_andere_dokumentationen_unangetastet() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+        seedWithChildren("d-b", 2_000L, "b")
+
+        documentationDao.delete(documentationDao.getById("d-a")!!)
+
+        assertNotNull(patientDao.getById("p-1"))
+        val remaining = documentationDao.getFullDocumentation("d-b")!!
+        assertEquals(2, remaining.blocks.size)
+        assertEquals(3, remaining.itemIdsByBlock().values.sumOf { it.size })
+        assertEquals(2, remaining.photos.size)
+        assertEquals(2, remaining.signatures.size)
+        assertEquals(2, countRows("block_states"))
+        assertEquals(3, countRows("check_item_states"))
+    }
+
+    @Test
+    fun block_loeschen_entfernt_seine_optionen_per_cascade_aber_nicht_die_anderer_bloecke() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+
+        execSql("DELETE FROM block_states WHERE id = 'a-b1'")
+
+        assertEquals(listOf("a-c3"), checkItemStateDao.getForBlockState("a-b2").map { it.id })
+        assertTrue(checkItemStateDao.getForBlockState("a-b1").isEmpty())
+        assertEquals(1, countRows("check_item_states"))
+    }
+
+    @Test
+    fun patient_mit_dokumentation_kann_nicht_geloescht_werden_und_kinder_bleiben_erhalten() = runDbTest {
+        seedWithChildren("d-a", 1_000L, "a")
+
+        val failed = runCatching { patientDao.delete(patientDao.getById("p-1")!!) }
+
+        assertTrue(failed.isFailure)
+        assertNotNull(documentationDao.getFullDocumentation("d-a"))
+        assertEquals(3, countRows("check_item_states"))
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/dao/PatientDaoTest.kt

@@ -0,0 +1,232 @@
+package de.medapp.wunddoku.data.dao
+
+import android.database.sqlite.SQLiteConstraintException
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.awaitMatching
+import de.medapp.wunddoku.testutil.expectThrows
+import de.medapp.wunddoku.testutil.patientEntity
+import de.medapp.wunddoku.testutil.runDbTest
+import kotlinx.coroutines.async
+import kotlinx.coroutines.flow.first
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/** DAO-Tests für [PatientDao]. */
+class PatientDaoTest : RoomTestBase() {
+
+    // --- insert / getById ----------------------------------------------------------------
+
+    @Test
+    fun insert_und_getById_liefern_alle_felder_zurueck() = runDbTest {
+        val entity = patientEntity(phone2 = "0987 654321", phone3 = "0555 123")
+
+        patientDao.insert(entity)
+
+        assertEquals(entity, patientDao.getById("p-1"))
+    }
+
+    @Test
+    fun optionale_telefonnummern_bleiben_null() = runDbTest {
+        patientDao.insert(patientEntity(phone2 = null, phone3 = null))
+
+        val loaded = patientDao.getById("p-1")!!
+
+        assertNull(loaded.phone2)
+        assertNull(loaded.phone3)
+    }
+
+    @Test
+    fun umlaute_und_sonderzeichen_bleiben_unveraendert() = runDbTest {
+        val entity = patientEntity(
+            firstName = "Jörg-Åke", lastName = "O'Brien-Müller", street = "Straße \"des\" 17. Juni 1/2", city = "Köln-Ehrenfeld",
+        )
+
+        patientDao.insert(entity)
+
+        assertEquals(entity, patientDao.getById("p-1"))
+    }
+
+    @Test
+    fun getById_liefert_null_fuer_unbekannte_id() = runDbTest {
+        assertNull(patientDao.getById("unbekannt"))
+    }
+
+    @Test
+    fun insert_mit_vorhandener_id_wirft_und_laesst_den_bestehenden_datensatz_unveraendert() = runDbTest {
+        val original = patientEntity(lastName = "Original")
+        patientDao.insert(original)
+
+        expectThrows<SQLiteConstraintException> { patientDao.insert(patientEntity(lastName = "Duplikat")) }
+
+        assertEquals(original, patientDao.getById("p-1"))
+    }
+
+    @Test
+    fun doppelte_stammdaten_mit_unterschiedlicher_id_sind_auf_db_ebene_erlaubt() = runDbTest {
+        // Duplikatschutz liegt bewusst in der Anwendung (findExisting), nicht in einem UNIQUE-Index.
+        patientDao.insert(patientEntity(id = "p-1"))
+        patientDao.insert(patientEntity(id = "p-2"))
+
+        assertEquals(2, countRows("patients"))
+    }
+
+    // --- update / delete -----------------------------------------------------------------
+
+    @Test
+    fun update_ueberschreibt_die_felder_des_datensatzes() = runDbTest {
+        patientDao.insert(patientEntity())
+        val changed = patientEntity(lastName = "Musterfrau", city = "Neustadt", phone2 = "0111", updatedAt = 2_000L)
+
+        patientDao.update(changed)
+
+        assertEquals(changed, patientDao.getById("p-1"))
+    }
+
+    @Test
+    fun update_einer_unbekannten_id_legt_keinen_datensatz_an() = runDbTest {
+        patientDao.update(patientEntity(id = "geist"))
+
+        assertNull(patientDao.getById("geist"))
+        assertEquals(0, countRows("patients"))
+    }
+
+    @Test
+    fun delete_entfernt_nur_den_uebergebenen_patienten() = runDbTest {
+        patientDao.insert(patientEntity(id = "p-1"))
+        patientDao.insert(patientEntity(id = "p-2"))
+
+        patientDao.delete(patientEntity(id = "p-1"))
+
+        assertNull(patientDao.getById("p-1"))
+        assertNotNull(patientDao.getById("p-2"))
+    }
+
+    @Test
+    fun delete_eines_unbekannten_patienten_ist_wirkungslos() = runDbTest {
+        patientDao.insert(patientEntity())
+
+        patientDao.delete(patientEntity(id = "unbekannt"))
+
+        assertEquals(1, countRows("patients"))
+    }
+
+    @Test
+    fun delete_wird_durch_vorhandene_dokumentation_verhindert_restrict() = runDbTest {
+        seedDocumentation()
+
+        expectThrows<SQLiteConstraintException> { patientDao.delete(patientEntity()) }
+
+        assertNotNull(patientDao.getById("p-1"))
+        assertEquals(1, countRows("documentations"))
+    }
+
+    // --- findExisting --------------------------------------------------------------------
+
+    @Test
+    fun findExisting_trifft_bei_gleichem_vornamen_nachnamen_und_geburtsdatum() = runDbTest {
+        patientDao.insert(patientEntity())
+
+        assertEquals("p-1", patientDao.findExisting("Max", "Mustermann", "1980-03-14")?.id)
+    }
+
+    @Test
+    fun findExisting_trifft_nicht_bei_abweichendem_feld() = runDbTest {
+        patientDao.insert(patientEntity())
+
+        assertNull(patientDao.findExisting("Moritz", "Mustermann", "1980-03-14"))
+        assertNull(patientDao.findExisting("Max", "Musterfrau", "1980-03-14"))
+        assertNull(patientDao.findExisting("Max", "Mustermann", "1980-03-15"))
+    }
+
+    @Test
+    fun findExisting_ist_ein_exakter_abgleich_und_unterscheidet_gross_und_kleinschreibung() = runDbTest {
+        // Dokumentiert das aktuelle Verhalten (SQL "="): "max" findet "Max" NICHT.
+        patientDao.insert(patientEntity())
+
+        assertNull(patientDao.findExisting("max", "mustermann", "1980-03-14"))
+    }
+
+    @Test
+    fun findExisting_liefert_bei_mehreren_treffern_genau_einen() = runDbTest {
+        patientDao.insert(patientEntity(id = "p-1"))
+        patientDao.insert(patientEntity(id = "p-2"))
+
+        val found = patientDao.findExisting("Max", "Mustermann", "1980-03-14")
+
+        assertTrue(found?.id == "p-1" || found?.id == "p-2")
+    }
+
+    // --- hasDocumentations ---------------------------------------------------------------
+
+    @Test
+    fun hasDocumentations_ist_false_ohne_und_true_mit_dokumentation() = runDbTest {
+        seedPatient("p-1")
+        seedPatient("p-2", lastName = "Musterfrau")
+        seedDocumentation(id = "d-1", patientId = "p-1")
+
+        assertTrue(patientDao.hasDocumentations("p-1"))
+        assertFalse(patientDao.hasDocumentations("p-2"))
+        assertFalse(patientDao.hasDocumentations("unbekannt"))
+    }
+
+    // --- observeAllWithLastDocumentation -------------------------------------------------
+
+    @Test
+    fun observeAllWithLastDocumentation_sortiert_nach_nachname_dann_vorname() = runDbTest {
+        seedPatient("p-1", firstName = "Max", lastName = "Müller")
+        seedPatient("p-2", firstName = "Anna", lastName = "Müller")
+        seedPatient("p-3", firstName = "Zoe", lastName = "Adler")
+
+        val result = patientDao.observeAllWithLastDocumentation().first()
+
+        assertEquals(listOf("p-3", "p-2", "p-1"), result.map { it.patient.id })
+    }
+
+    @Test
+    fun lastDocumentationAt_ist_das_maximale_erstelldatum_unabhaengig_von_der_einfuegereihenfolge() = runDbTest {
+        seedPatient("p-1")
+        seedDocumentation(id = "d-1", patientId = "p-1", createdAt = 3_000L)
+        seedDocumentation(id = "d-2", patientId = "p-1", createdAt = 1_000L)
+        seedDocumentation(id = "d-3", patientId = "p-1", createdAt = 2_000L)
+
+        val result = patientDao.observeAllWithLastDocumentation().first().single()
+
+        assertEquals(3_000L, result.lastDocumentationAt)
+    }
+
+    @Test
+    fun lastDocumentationAt_ist_null_ohne_dokumentation_und_beruecksichtigt_nur_eigene_dokumentationen() = runDbTest {
+        seedPatient("p-1")
+        seedPatient("p-2", firstName = "Erika", lastName = "Musterfrau")
+        seedDocumentation(id = "d-1", patientId = "p-1", createdAt = 5_000L)
+
+        val byId = patientDao.observeAllWithLastDocumentation().first().associateBy { it.patient.id }
+
+        assertEquals(5_000L, byId.getValue("p-1").lastDocumentationAt)
+        assertNull(byId.getValue("p-2").lastDocumentationAt)
+    }
+
+    @Test
+    fun observeAllWithLastDocumentation_liefert_leere_liste_ohne_patienten() = runDbTest {
+        assertTrue(patientDao.observeAllWithLastDocumentation().first().isEmpty())
+    }
+
+    @Test
+    fun observeAllWithLastDocumentation_aktualisiert_sich_bei_aenderungen() = runDbTest {
+        seedPatient("p-1")
+        val waiting = async {
+            patientDao.observeAllWithLastDocumentation().awaitMatching { list ->
+                list.size == 2 && list.any { it.patient.id == "p-1" && it.lastDocumentationAt == 9_000L }
+            }
+        }
+
+        seedPatient("p-2", firstName = "Erika", lastName = "Musterfrau")
+        seedDocumentation(id = "d-1", patientId = "p-1", createdAt = 9_000L)
+
+        assertEquals(2, waiting.await().size)
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/dao/PhotoAndSignatureDaoTest.kt

@@ -0,0 +1,168 @@
+package de.medapp.wunddoku.data.dao
+
+import android.database.sqlite.SQLiteConstraintException
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.expectThrows
+import de.medapp.wunddoku.testutil.photoEntity
+import de.medapp.wunddoku.testutil.runDbTest
+import de.medapp.wunddoku.testutil.signatureEntity
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/** DAO-Tests für [PhotoDao] und [SignatureDao] (beide nach demselben Muster aufgebaut). */
+class PhotoAndSignatureDaoTest : RoomTestBase() {
+
+    // --- PhotoDao ------------------------------------------------------------------------
+
+    @Test
+    fun photo_insert_und_getById_liefern_alle_felder() = runDbTest {
+        seedDocumentation()
+        val photo = photoEntity(fileName = "wunde_2026-08-23.jpg", orderIndex = 2, createdAt = 5_000L)
+
+        photoDao.insert(photo)
+
+        assertEquals(photo, photoDao.getById("ph-1"))
+        assertNull(photoDao.getById("unbekannt"))
+    }
+
+    @Test
+    fun photo_getForDocumentation_sortiert_nach_orderIndex_und_filtert_nach_dokumentation() = runDbTest {
+        seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+        photoDao.insert(photoEntity(id = "ph-3", documentationId = "d-1", orderIndex = 2))
+        photoDao.insert(photoEntity(id = "ph-1", documentationId = "d-1", orderIndex = 0))
+        photoDao.insert(photoEntity(id = "ph-2", documentationId = "d-1", orderIndex = 1))
+        photoDao.insert(photoEntity(id = "ph-x", documentationId = "d-2", orderIndex = 0))
+
+        assertEquals(listOf("ph-1", "ph-2", "ph-3"), photoDao.getForDocumentation("d-1").map { it.id })
+        assertEquals(listOf("ph-x"), photoDao.getForDocumentation("d-2").map { it.id })
+        assertTrue(photoDao.getForDocumentation("unbekannt").isEmpty())
+    }
+
+    @Test
+    fun photo_getMaxOrderIndex_ist_minus_eins_ohne_fotos_sonst_der_hoechste_wert() = runDbTest {
+        seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+        assertEquals(-1, photoDao.getMaxOrderIndex("d-1"))
+
+        photoDao.insert(photoEntity(id = "ph-1", documentationId = "d-1", orderIndex = 0))
+        photoDao.insert(photoEntity(id = "ph-2", documentationId = "d-1", orderIndex = 4))
+        photoDao.insert(photoEntity(id = "ph-3", documentationId = "d-2", orderIndex = 9))
+
+        assertEquals(4, photoDao.getMaxOrderIndex("d-1"))
+        assertEquals(9, photoDao.getMaxOrderIndex("d-2"))
+        assertEquals(-1, photoDao.getMaxOrderIndex("unbekannt"))
+    }
+
+    @Test
+    fun photo_getMaxOrderIndex_bleibt_nach_dem_loeschen_eines_mittleren_fotos_korrekt() = runDbTest {
+        seedDocumentation()
+        photoDao.insert(photoEntity(id = "ph-1", orderIndex = 0))
+        photoDao.insert(photoEntity(id = "ph-2", orderIndex = 1))
+        photoDao.insert(photoEntity(id = "ph-3", orderIndex = 2))
+
+        photoDao.delete(photoEntity(id = "ph-2", orderIndex = 1))
+
+        assertEquals(2, photoDao.getMaxOrderIndex("d-1"))
+        assertEquals(listOf(0, 2), photoDao.getForDocumentation("d-1").map { it.orderIndex })
+    }
+
+    @Test
+    fun photo_delete_entfernt_nur_das_angegebene_foto() = runDbTest {
+        seedDocumentation()
+        photoDao.insert(photoEntity(id = "ph-1", orderIndex = 0))
+        photoDao.insert(photoEntity(id = "ph-2", orderIndex = 1))
+
+        photoDao.delete(photoEntity(id = "ph-1"))
+
+        assertNull(photoDao.getById("ph-1"))
+        assertEquals("ph-2", photoDao.getById("ph-2")?.id)
+    }
+
+    @Test
+    fun photo_mit_gleichem_orderIndex_ist_erlaubt_kein_unique_index() = runDbTest {
+        seedDocumentation()
+
+        photoDao.insert(photoEntity(id = "ph-1", orderIndex = 0))
+        photoDao.insert(photoEntity(id = "ph-2", orderIndex = 0))
+
+        assertEquals(2, photoDao.getForDocumentation("d-1").size)
+    }
+
+    @Test
+    fun photo_mit_vorhandener_id_oder_unbekannter_dokumentation_wirft() = runDbTest {
+        seedDocumentation()
+        photoDao.insert(photoEntity(id = "ph-1"))
+
+        expectThrows<SQLiteConstraintException> { photoDao.insert(photoEntity(id = "ph-1", fileName = "andere.jpg")) }
+        expectThrows<SQLiteConstraintException> { photoDao.insert(photoEntity(id = "ph-2", documentationId = "gibt-es-nicht")) }
+
+        assertEquals(1, countRows("photos"))
+    }
+
+    // --- SignatureDao --------------------------------------------------------------------
+
+    @Test
+    fun signature_insert_und_getById_liefern_alle_felder() = runDbTest {
+        seedDocumentation()
+        val signature = signatureEntity(signerName = "Dr. Åsa Müller-Öz", fileName = "sig_1.png", orderIndex = 1, createdAt = 7_000L)
+
+        signatureDao.insert(signature)
+
+        assertEquals(signature, signatureDao.getById("s-1"))
+        assertNull(signatureDao.getById("unbekannt"))
+    }
+
+    @Test
+    fun signature_getForDocumentation_sortiert_nach_orderIndex_und_filtert_nach_dokumentation() = runDbTest {
+        seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+        signatureDao.insert(signatureEntity(id = "s-3", documentationId = "d-1", orderIndex = 2))
+        signatureDao.insert(signatureEntity(id = "s-1", documentationId = "d-1", orderIndex = 0))
+        signatureDao.insert(signatureEntity(id = "s-2", documentationId = "d-1", orderIndex = 1))
+        signatureDao.insert(signatureEntity(id = "s-x", documentationId = "d-2", orderIndex = 0))
+
+        assertEquals(listOf("s-1", "s-2", "s-3"), signatureDao.getForDocumentation("d-1").map { it.id })
+        assertEquals(listOf("s-x"), signatureDao.getForDocumentation("d-2").map { it.id })
+        assertTrue(signatureDao.getForDocumentation("unbekannt").isEmpty())
+    }
+
+    @Test
+    fun signature_getMaxOrderIndex_ist_minus_eins_ohne_signaturen_sonst_der_hoechste_wert() = runDbTest {
+        seedDocumentation(id = "d-1")
+        seedDocumentation(id = "d-2")
+        assertEquals(-1, signatureDao.getMaxOrderIndex("d-1"))
+
+        signatureDao.insert(signatureEntity(id = "s-1", documentationId = "d-1", orderIndex = 0))
+        signatureDao.insert(signatureEntity(id = "s-2", documentationId = "d-1", orderIndex = 3))
+        signatureDao.insert(signatureEntity(id = "s-3", documentationId = "d-2", orderIndex = 7))
+
+        assertEquals(3, signatureDao.getMaxOrderIndex("d-1"))
+        assertEquals(7, signatureDao.getMaxOrderIndex("d-2"))
+    }
+
+    @Test
+    fun signature_delete_entfernt_nur_die_angegebene_signatur() = runDbTest {
+        seedDocumentation()
+        signatureDao.insert(signatureEntity(id = "s-1", orderIndex = 0))
+        signatureDao.insert(signatureEntity(id = "s-2", orderIndex = 1))
+
+        signatureDao.delete(signatureEntity(id = "s-1"))
+
+        assertNull(signatureDao.getById("s-1"))
+        assertEquals("s-2", signatureDao.getById("s-2")?.id)
+    }
+
+    @Test
+    fun signature_mit_vorhandener_id_oder_unbekannter_dokumentation_wirft() = runDbTest {
+        seedDocumentation()
+        signatureDao.insert(signatureEntity(id = "s-1"))
+
+        expectThrows<SQLiteConstraintException> { signatureDao.insert(signatureEntity(id = "s-1", signerName = "Anderer")) }
+        expectThrows<SQLiteConstraintException> { signatureDao.insert(signatureEntity(id = "s-2", documentationId = "gibt-es-nicht")) }
+
+        assertEquals(1, countRows("signatures"))
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/dao/SearchQueryTest.kt

@@ -0,0 +1,229 @@
+package de.medapp.wunddoku.data.dao
+
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.awaitMatching
+import de.medapp.wunddoku.testutil.documentationEntity
+import de.medapp.wunddoku.testutil.runDbTest
+import kotlinx.coroutines.async
+import kotlinx.coroutines.flow.first
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * Suchtests (QA-002): [DocumentationDao.search] und [PatientDao.searchWithLastDocumentation].
+ *
+ * Szenario (Erstelldatum in Klammern):
+ *  - p-1 Max Mustermann, 1980-03-14: d-1 (1000), d-2 (3000)
+ *  - p-2 Erika Musterfrau, 1975-12-01: d-3 (2000)
+ *  - p-3 Hans Beispiel, 1990-07-30: d-4 (500)
+ *  - p-4 Zora Zimmer, 2001-01-01: keine Dokumentation
+ */
+class SearchQueryTest : RoomTestBase() {
+
+    private suspend fun seedDoc(id: String, patientId: String, createdAt: Long, first: String, last: String, birth: String) {
+        documentationDao.insert(
+            documentationEntity(
+                id = id, patientId = patientId, createdAt = createdAt,
+                firstNameSnapshot = first, lastNameSnapshot = last, birthDateSnapshot = birth,
+            )
+        )
+    }
+
+    private suspend fun seedScenario() {
+        seedPatient("p-1", "Max", "Mustermann", "1980-03-14")
+        seedPatient("p-2", "Erika", "Musterfrau", "1975-12-01")
+        seedPatient("p-3", "Hans", "Beispiel", "1990-07-30")
+        seedPatient("p-4", "Zora", "Zimmer", "2001-01-01")
+        seedDoc("d-1", "p-1", 1_000L, "Max", "Mustermann", "1980-03-14")
+        seedDoc("d-2", "p-1", 3_000L, "Max", "Mustermann", "1980-03-14")
+        seedDoc("d-3", "p-2", 2_000L, "Erika", "Musterfrau", "1975-12-01")
+        seedDoc("d-4", "p-3", 500L, "Hans", "Beispiel", "1990-07-30")
+    }
+
+    private suspend fun searchDocs(query: String) = documentationDao.search(query).first().map { it.id }
+
+    // --- Dokumentationssuche -------------------------------------------------------------
+
+    @Test
+    fun dokumentationssuche_findet_ueber_den_nachnamen_neueste_zuerst() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("d-2", "d-3", "d-1"), searchDocs("Muster"))
+        assertEquals(listOf("d-2", "d-1"), searchDocs("Mustermann"))
+    }
+
+    @Test
+    fun dokumentationssuche_findet_ueber_den_vornamen_ohne_beachtung_der_gross_und_kleinschreibung() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("d-3"), searchDocs("erika"))
+        assertEquals(listOf("d-3"), searchDocs("ERIKA"))
+    }
+
+    @Test
+    fun dokumentationssuche_findet_ueber_das_geburtsdatum_auch_teilweise() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("d-4"), searchDocs("1990-07"))
+        assertEquals(listOf("d-2", "d-1"), searchDocs("1980"))
+        assertEquals(listOf("d-3"), searchDocs("12-01"))
+    }
+
+    @Test
+    fun dokumentationssuche_ist_ein_teilstring_abgleich() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("d-2", "d-1"), searchDocs("term"))
+    }
+
+    @Test
+    fun dokumentationssuche_ohne_treffer_liefert_leere_liste() = runDbTest {
+        seedScenario()
+
+        assertTrue(searchDocs("Zzz").isEmpty())
+    }
+
+    @Test
+    fun dokumentationssuche_liefert_keine_dubletten_wenn_mehrere_spalten_treffen() = runDbTest {
+        seedScenario()
+
+        // "e" trifft bei p-2 gleichzeitig Vor- und Nachnamen (Erika / Musterfrau).
+        val ids = searchDocs("e")
+
+        assertEquals(listOf("d-2", "d-3", "d-1", "d-4"), ids)
+        assertEquals(ids.size, ids.toSet().size)
+    }
+
+    @Test
+    fun dokumentationssuche_findet_keine_patienten_ohne_dokumentation() = runDbTest {
+        seedScenario()
+
+        assertTrue(searchDocs("Zora").isEmpty())
+    }
+
+    @Test
+    fun dokumentationssuche_mit_leerem_text_liefert_alle_dokumentationen_der_schutz_davor_liegt_im_repository() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("d-2", "d-3", "d-1", "d-4"), searchDocs(""))
+    }
+
+    @Test
+    fun dokumentationssuche_sucht_gegen_den_aktuellen_namen_und_nicht_gegen_den_snapshot() = runDbTest {
+        seedScenario()
+        patientDao.update(patientDao.getById("p-1")!!.copy(lastName = "Neuname"))
+
+        assertEquals(listOf("d-2", "d-1"), searchDocs("Neuname"))
+        assertTrue(searchDocs("Mustermann").isEmpty())
+        // Die gelieferten Zeilen zeigen weiterhin den eingefrorenen Namen.
+        val hits = documentationDao.search("Neuname").first()
+        assertTrue(hits.all { it.patientLastNameSnapshot == "Mustermann" })
+    }
+
+    @Test
+    fun dokumentationssuche_behandelt_sql_sonderzeichen_als_normalen_text() = runDbTest {
+        seedScenario()
+
+        assertTrue(searchDocs("'; DROP TABLE patients; --").isEmpty())
+        assertTrue(searchDocs("\"").isEmpty())
+        assertTrue(searchDocs("O'Brien").isEmpty())
+        assertEquals(4, countRows("patients"))
+    }
+
+    @Test
+    fun dokumentationssuche_aktualisiert_sich_bei_neuen_dokumentationen_und_namensaenderungen() = runDbTest {
+        seedScenario()
+
+        val afterNewDoc = async { documentationDao.search("Muster").awaitMatching { it.size == 4 } }
+        seedDoc("d-5", "p-1", 4_000L, "Max", "Mustermann", "1980-03-14")
+        assertEquals("d-5", afterNewDoc.await().first().id)
+
+        val afterRename = async { documentationDao.search("Neuname").awaitMatching { it.size == 3 } }
+        patientDao.update(patientDao.getById("p-1")!!.copy(lastName = "Neuname"))
+        assertEquals(listOf("d-5", "d-2", "d-1"), afterRename.await().map { it.id })
+    }
+
+    // --- Patientensuche ------------------------------------------------------------------
+
+    private suspend fun searchPatients(query: String) = patientDao.searchWithLastDocumentation(query).first()
+
+    @Test
+    fun patientensuche_sortiert_treffer_nach_nachname_und_liefert_letztes_dokumentationsdatum() = runDbTest {
+        seedScenario()
+
+        val result = searchPatients("Muster")
+
+        assertEquals(listOf("p-2", "p-1"), result.map { it.patient.id }) // Musterfrau vor Mustermann
+        assertEquals(listOf(2_000L, 3_000L), result.map { it.lastDocumentationAt })
+    }
+
+    @Test
+    fun patientensuche_findet_ueber_vorname_nachname_und_geburtsdatum() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("p-3"), searchPatients("han").map { it.patient.id })
+        assertEquals(listOf("p-3"), searchPatients("beispiel").map { it.patient.id })
+        assertEquals(listOf("p-2"), searchPatients("1975").map { it.patient.id })
+        assertTrue(searchPatients("Zzz").isEmpty())
+    }
+
+    @Test
+    fun patientensuche_findet_auch_patienten_ohne_dokumentation_mit_null_datum() = runDbTest {
+        seedScenario()
+
+        val result = searchPatients("Zora").single()
+
+        assertEquals("p-4", result.patient.id)
+        assertNull(result.lastDocumentationAt)
+    }
+
+    @Test
+    fun patientensuche_liefert_keine_dubletten_trotz_mehrerer_dokumentationen_und_treffer_spalten() = runDbTest {
+        seedScenario()
+
+        val ids = searchPatients("e").map { it.patient.id }
+
+        assertEquals(ids.size, ids.toSet().size)
+        assertEquals(listOf("p-3", "p-2", "p-1", "p-4"), ids) // Beispiel, Musterfrau, Mustermann, Zimmer
+    }
+
+    @Test
+    fun patientensuche_mit_leerem_text_liefert_alle_patienten_sortiert() = runDbTest {
+        seedScenario()
+
+        assertEquals(listOf("p-3", "p-2", "p-1", "p-4"), searchPatients("").map { it.patient.id })
+    }
+
+    @Test
+    fun patientensuche_sortiert_bei_gleichem_nachnamen_nach_vornamen() = runDbTest {
+        seedPatient("p-1", "Max", "Müller", "1980-01-01")
+        seedPatient("p-2", "Anna", "Müller", "1981-01-01")
+
+        assertEquals(listOf("p-2", "p-1"), searchPatients("Müller").map { it.patient.id })
+    }
+
+    @Test
+    fun patientensuche_behandelt_sql_sonderzeichen_als_normalen_text() = runDbTest {
+        seedScenario()
+
+        assertTrue(searchPatients("'; DROP TABLE patients; --").isEmpty())
+        assertEquals(4, countRows("patients"))
+    }
+
+    @Test
+    fun patientensuche_aktualisiert_sich_bei_neuen_patienten_und_dokumentationen() = runDbTest {
+        seedScenario()
+
+        val afterNewPatient = async { patientDao.searchWithLastDocumentation("Muster").awaitMatching { it.size == 3 } }
+        seedPatient("p-5", "Karl", "Musterkind", "2010-05-05")
+        assertEquals(3, afterNewPatient.await().size)
+
+        val afterNewDoc = async {
+            patientDao.searchWithLastDocumentation("Musterkind").awaitMatching { list -> list.singleOrNull()?.lastDocumentationAt == 8_000L }
+        }
+        seedDoc("d-9", "p-5", 8_000L, "Karl", "Musterkind", "2010-05-05")
+        afterNewDoc.await()
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/dao/WoundCarerDaoTest.kt

@@ -0,0 +1,128 @@
+package de.medapp.wunddoku.data.dao
+
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.runDbTest
+import de.medapp.wunddoku.testutil.woundCarerEntity
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/** DAO-Tests für [WoundCarerDao] (Wundversorger-Register). */
+class WoundCarerDaoTest : RoomTestBase() {
+
+    // --- insertOrUpdate ------------------------------------------------------------------
+
+    @Test
+    fun insertOrUpdate_legt_neuen_eintrag_an() = runDbTest {
+        val carer = woundCarerEntity(updatedAt = 5_000L)
+
+        woundCarerDao.insertOrUpdate(carer)
+
+        assertEquals(carer, woundCarerDao.getMostRecentlyUsed())
+    }
+
+    @Test
+    fun insertOrUpdate_ersetzt_vorhandenen_eintrag_mit_gleicher_id_vollstaendig() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna Schmidt", signatureFileName = "alt.png", updatedAt = 1_000L))
+
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna Schmidt-Neu", signatureFileName = "neu.png", updatedAt = 2_000L))
+
+        assertEquals(1, countRows("wound_carers"))
+        val loaded = woundCarerDao.getMostRecentlyUsed()!!
+        assertEquals("Anna Schmidt-Neu", loaded.name)
+        assertEquals("neu.png", loaded.signatureFileName)
+        assertEquals(2_000L, loaded.updatedAt)
+    }
+
+    @Test
+    fun insertOrUpdate_mit_verschiedenen_ids_und_gleichem_namen_legt_zwei_eintraege_an() = runDbTest {
+        // Namens-Eindeutigkeit stellt das Repository (findByName) sicher, nicht die Datenbank.
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna"))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-2", name = "Anna"))
+
+        assertEquals(2, countRows("wound_carers"))
+    }
+
+    // --- findByName ----------------------------------------------------------------------
+
+    @Test
+    fun findByName_ist_ein_exakter_abgleich_ohne_beachtung_der_gross_und_kleinschreibung() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna Schmidt"))
+
+        assertEquals("w-1", woundCarerDao.findByName("Anna Schmidt")?.id)
+        assertEquals("w-1", woundCarerDao.findByName("anna schmidt")?.id)
+        assertEquals("w-1", woundCarerDao.findByName("ANNA SCHMIDT")?.id)
+    }
+
+    @Test
+    fun findByName_trifft_nicht_bei_teilstring_oder_praefix() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(name = "Anna Schmidt"))
+
+        assertNull(woundCarerDao.findByName("Anna"))
+        assertNull(woundCarerDao.findByName("Schmidt"))
+        assertNull(woundCarerDao.findByName("Anna Schmidt "))
+        assertNull(woundCarerDao.findByName("unbekannt"))
+    }
+
+    // --- searchByNamePrefix --------------------------------------------------------------
+
+    @Test
+    fun searchByNamePrefix_liefert_praefix_treffer_ohne_beachtung_der_gross_und_kleinschreibung() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna Schmidt", updatedAt = 1_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-2", name = "Andreas Müller", updatedAt = 2_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-3", name = "Bernd Beispiel", updatedAt = 3_000L))
+
+        assertEquals(listOf("w-2", "w-1"), woundCarerDao.searchByNamePrefix("an", 10).map { it.id })
+        assertEquals(listOf("w-2", "w-1"), woundCarerDao.searchByNamePrefix("AN", 10).map { it.id })
+        assertEquals(listOf("w-3"), woundCarerDao.searchByNamePrefix("Bern", 10).map { it.id })
+    }
+
+    @Test
+    fun searchByNamePrefix_ist_kein_teilstring_abgleich() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(name = "Anna Schmidt"))
+
+        assertTrue(woundCarerDao.searchByNamePrefix("Schmidt", 10).isEmpty())
+        assertTrue(woundCarerDao.searchByNamePrefix("nna", 10).isEmpty())
+    }
+
+    @Test
+    fun searchByNamePrefix_sortiert_nach_letzter_verwendung_absteigend_und_beachtet_das_limit() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna A", updatedAt = 1_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-2", name = "Anna B", updatedAt = 4_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-3", name = "Anna C", updatedAt = 3_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-4", name = "Anna D", updatedAt = 2_000L))
+
+        assertEquals(listOf("w-2", "w-3", "w-4", "w-1"), woundCarerDao.searchByNamePrefix("Anna", 10).map { it.id })
+        assertEquals(listOf("w-2", "w-3"), woundCarerDao.searchByNamePrefix("Anna", 2).map { it.id })
+        assertTrue(woundCarerDao.searchByNamePrefix("Anna", 0).isEmpty())
+    }
+
+    @Test
+    fun searchByNamePrefix_mit_leerem_praefix_liefert_alle_eintraege_der_schutz_davor_liegt_im_repository() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna"))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-2", name = "Bernd", updatedAt = 2_000L))
+
+        assertEquals(2, woundCarerDao.searchByNamePrefix("", 10).size)
+    }
+
+    // --- getMostRecentlyUsed -------------------------------------------------------------
+
+    @Test
+    fun getMostRecentlyUsed_ist_null_bei_leerer_tabelle() = runDbTest {
+        assertNull(woundCarerDao.getMostRecentlyUsed())
+    }
+
+    @Test
+    fun getMostRecentlyUsed_liefert_den_eintrag_mit_dem_hoechsten_updatedAt() = runDbTest {
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna", updatedAt = 1_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-2", name = "Bernd", updatedAt = 3_000L))
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-3", name = "Clara", updatedAt = 2_000L))
+
+        assertEquals("w-2", woundCarerDao.getMostRecentlyUsed()?.id)
+
+        woundCarerDao.insertOrUpdate(woundCarerEntity(id = "w-1", name = "Anna", updatedAt = 9_000L))
+
+        assertEquals("w-1", woundCarerDao.getMostRecentlyUsed()?.id)
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/data/database/DatabaseTransactionTest.kt

@@ -0,0 +1,222 @@
+package de.medapp.wunddoku.data.database
+
+import android.database.sqlite.SQLiteConstraintException
+import androidx.room.withTransaction
+import de.medapp.wunddoku.testutil.RoomTestBase
+import de.medapp.wunddoku.testutil.blockStateEntity
+import de.medapp.wunddoku.testutil.checkItemStateEntity
+import de.medapp.wunddoku.testutil.documentationEntity
+import de.medapp.wunddoku.testutil.expectThrows
+import de.medapp.wunddoku.testutil.photoEntity
+import de.medapp.wunddoku.testutil.runDbTest
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.coroutineScope
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+/**
+ * Transaction-Tests (QA-002): Room-Transaktionen (`db.withTransaction`) müssen Mehrtabellen-
+ * Schreibvorgänge - wie in DocumentationRepository.createEmpty()/continueDocumentation() -
+ * atomar machen.
+ *
+ * Hinweis: In-Memory-Datenbanken haben nur eine Verbindung. Deshalb wird innerhalb einer
+ * Transaktion ausschließlich über DAOs gelesen, nie über Roh-SQL des Test-Threads.
+ */
+class DatabaseTransactionTest : RoomTestBase() {
+
+    // --- Commit --------------------------------------------------------------------------
+
+    @Test
+    fun commit_macht_alle_schreibvorgaenge_sichtbar() = runDbTest {
+        seedPatient()
+
+        db.withTransaction {
+            documentationDao.insert(documentationEntity())
+            blockStateDao.insertAll(listOf(blockStateEntity()))
+            checkItemStateDao.insertAll(listOf(checkItemStateEntity()))
+            photoDao.insert(photoEntity())
+        }
+
+        assertEquals(1, countRows("documentations"))
+        assertEquals(1, countRows("block_states"))
+        assertEquals(1, countRows("check_item_states"))
+        assertEquals(1, countRows("photos"))
+    }
+
+    @Test
+    fun transaktion_gibt_das_ergebnis_des_blocks_zurueck() = runDbTest {
+        val result = db.withTransaction {
+            seedPatient()
+            42
+        }
+
+        assertEquals(42, result)
+        assertNotNull(patientDao.getById("p-1"))
+    }
+
+    @Test
+    fun innerhalb_der_transaktion_sind_die_eigenen_schreibvorgaenge_bereits_lesbar() = runDbTest {
+        seedPatient()
+
+        db.withTransaction {
+            documentationDao.insert(documentationEntity())
+            assertNotNull(documentationDao.getById("d-1"))
+            blockStateDao.insertAll(listOf(blockStateEntity()))
+            assertEquals(1, blockStateDao.getForDocumentation("d-1").size)
+        }
+    }
+
+    // --- Rollback ------------------------------------------------------------------------
+
+    @Test
+    fun exception_im_block_verwirft_alle_schreibvorgaenge_und_wird_weitergereicht() = runDbTest {
+        seedPatient()
+
+        val error = expectThrows<IllegalStateException> {
+            db.withTransaction {
+                documentationDao.insert(documentationEntity())
+                blockStateDao.insertAll(listOf(blockStateEntity()))
+                checkItemStateDao.insertAll(listOf(checkItemStateEntity()))
+                error("Abbruch mitten in der Transaktion")
+            }
+        }
+
+        assertEquals("Abbruch mitten in der Transaktion", error.message)
+        assertNull(documentationDao.getById("d-1"))
+        assertEquals(0, countRows("block_states"))
+        assertEquals(0, countRows("check_item_states"))
+        assertNotNull("Daten vor der Transaktion bleiben bestehen", patientDao.getById("p-1"))
+    }
+
+    @Test
+    fun constraint_verletzung_in_einem_spaeteren_schritt_verwirft_auch_die_frueheren_inserts() = runDbTest {
+        seedPatient()
+
+        expectThrows<SQLiteConstraintException> {
+            db.withTransaction {
+                documentationDao.insert(documentationEntity())
+                photoDao.insert(photoEntity(documentationId = "gibt-es-nicht")) // FK-Verletzung
+            }
+        }
+
+        assertNull(documentationDao.getById("d-1"))
+        assertEquals(0, countRows("photos"))
+    }
+
+    @Test
+    fun insertAll_ist_atomar_ein_fehlerhafter_eintrag_verwirft_die_ganze_liste() = runDbTest {
+        seedDocumentation()
+
+        expectThrows<SQLiteConstraintException> {
+            blockStateDao.insertAll(
+                listOf(
+                    blockStateEntity(id = "b-1", blockDefinitionId = "wundart"),
+                    blockStateEntity(id = "b-2", blockDefinitionId = "groesse"),
+                    blockStateEntity(id = "b-3", blockDefinitionId = "wundart"), // verletzt UNIQUE
+                )
+            )
+        }
+
+        assertEquals(0, countRows("block_states"))
+    }
+
+    @Test
+    fun rollback_nimmt_ein_cascade_loeschen_wieder_zurueck() = runDbTest {
+        val doc = seedDocumentation()
+        blockStateDao.insertAll(listOf(blockStateEntity()))
+        checkItemStateDao.insertAll(listOf(checkItemStateEntity()))
+        photoDao.insert(photoEntity())
+
+        expectThrows<IllegalStateException> {
+            db.withTransaction {
+                documentationDao.delete(doc)
+                assertNull(documentationDao.getById("d-1"))
+                error("Abbruch nach dem Löschen")
+            }
+        }
+
+        assertNotNull(documentationDao.getById("d-1"))
+        assertEquals(1, countRows("block_states"))
+        assertEquals(1, countRows("check_item_states"))
+        assertEquals(1, countRows("photos"))
+    }
+
+    @Test
+    fun datenbank_bleibt_nach_einer_fehlgeschlagenen_transaktion_voll_nutzbar() = runDbTest {
+        seedPatient()
+        expectThrows<IllegalStateException> {
+            db.withTransaction {
+                documentationDao.insert(documentationEntity(id = "d-verloren"))
+                error("Abbruch")
+            }
+        }
+
+        db.withTransaction { documentationDao.insert(documentationEntity(id = "d-ok")) }
+        documentationDao.insert(documentationEntity(id = "d-direkt"))
+
+        assertNull(documentationDao.getById("d-verloren"))
+        assertNotNull(documentationDao.getById("d-ok"))
+        assertNotNull(documentationDao.getById("d-direkt"))
+    }
+
+    // --- Verschachtelung -----------------------------------------------------------------
+
+    @Test
+    fun verschachtelte_transaktionen_commiten_gemeinsam() = runDbTest {
+        seedPatient()
+
+        db.withTransaction {
+            documentationDao.insert(documentationEntity(id = "d-aussen"))
+            db.withTransaction { documentationDao.insert(documentationEntity(id = "d-innen")) }
+        }
+
+        assertEquals(2, countRows("documentations"))
+    }
+
+    @Test
+    fun fehler_in_der_inneren_transaktion_rollt_auch_die_aeussere_zurueck_selbst_wenn_er_gefangen_wird() = runDbTest {
+        // SQLite/Android: Wird eine verschachtelte Transaktion nicht als erfolgreich beendet,
+        // wird die äußere ebenfalls zurückgerollt (SQLiteDatabase.beginTransaction-Doku).
+        seedPatient()
+
+        db.withTransaction {
+            documentationDao.insert(documentationEntity(id = "d-aussen"))
+            try {
+                db.withTransaction {
+                    documentationDao.insert(documentationEntity(id = "d-innen"))
+                    error("Fehler innen")
+                }
+            } catch (e: IllegalStateException) {
+                // bewusst gefangen: "e" ist unbenutzt, der Fehler soll die äußere Transaktion nicht abbrechen
+            }
+        }
+
+        assertEquals(0, countRows("documentations"))
+    }
+
+    // --- Nebenläufigkeit -----------------------------------------------------------------
+
+    @Test
+    fun parallele_transaktionen_werden_serialisiert_und_verlieren_keine_schreibvorgaenge() = runDbTest {
+        seedDocumentation()
+
+        coroutineScope {
+            listOf("a", "b", "c").map { prefix ->
+                async(Dispatchers.Default) {
+                    repeat(20) { i ->
+                        db.withTransaction {
+                            photoDao.insert(photoEntity(id = "$prefix-$i", fileName = "$prefix$i.jpg", orderIndex = i))
+                        }
+                    }
+                }
+            }.awaitAll()
+        }
+
+        assertEquals(60, countRows("photos"))
+        assertEquals(60, photoDao.getForDocumentation("d-1").size)
+    }
+}

app/src/androidTest/java/de/medapp/wunddoku/testutil/EntityFactory.kt

@@ -0,0 +1,154 @@
+package de.medapp.wunddoku.testutil
+
+import de.medapp.wunddoku.data.entity.BlockStateEntity
+import de.medapp.wunddoku.data.entity.CheckItemStateEntity
+import de.medapp.wunddoku.data.entity.DocumentationEntity
+import de.medapp.wunddoku.data.entity.PatientEntity
+import de.medapp.wunddoku.data.entity.PhotoEntity
+import de.medapp.wunddoku.data.entity.SignatureEntity
+import de.medapp.wunddoku.data.entity.WoundCarerEntity
+import de.medapp.wunddoku.domain.model.DocumentationStatus
+
+/** Builder für Room-Entities mit sinnvollen Standardwerten - Tests überschreiben nur, was sie brauchen. */
+
+fun patientEntity(
+    id: String = "p-1",
+    firstName: String = "Max",
+    lastName: String = "Mustermann",
+    birthDate: String = "1980-03-14",
+    street: String = "Musterstraße 1",
+    postalCode: String = "12345",
+    city: String = "Musterstadt",
+    phone1: String = "0123 456789",
+    phone2: String? = null,
+    phone3: String? = null,
+    createdAt: Long = 1_000L,
+    updatedAt: Long = createdAt,
+) = PatientEntity(
+    id = id,
+    firstName = firstName,
+    lastName = lastName,
+    birthDate = birthDate,
+    street = street,
+    postalCode = postalCode,
+    city = city,
+    phone1 = phone1,
+    phone2 = phone2,
+    phone3 = phone3,
+    createdAt = createdAt,
+    updatedAt = updatedAt,
+)
+
+fun documentationEntity(
+    id: String = "d-1",
+    patientId: String = "p-1",
+    status: DocumentationStatus = DocumentationStatus.IN_PROGRESS,
+    createdAt: Long = 1_000L,
+    updatedAt: Long = createdAt,
+    continuedFromDocumentationId: String? = null,
+    pdfLastGeneratedAt: Long? = null,
+    catalogVersion: Int = 4,
+    firstNameSnapshot: String = "Max",
+    lastNameSnapshot: String = "Mustermann",
+    birthDateSnapshot: String = "1980-03-14",
+    streetSnapshot: String = "Musterstraße 1",
+    postalCodeSnapshot: String = "12345",
+    citySnapshot: String = "Musterstadt",
+) = DocumentationEntity(
+    id = id,
+    patientId = patientId,
+    status = status,
+    createdAt = createdAt,
+    updatedAt = updatedAt,
+    continuedFromDocumentationId = continuedFromDocumentationId,
+    pdfLastGeneratedAt = pdfLastGeneratedAt,
+    catalogVersion = catalogVersion,
+    patientFirstNameSnapshot = firstNameSnapshot,
+    patientLastNameSnapshot = lastNameSnapshot,
+    patientBirthDateSnapshot = birthDateSnapshot,
+    patientStreetSnapshot = streetSnapshot,
+    patientPostalCodeSnapshot = postalCodeSnapshot,
+    patientCitySnapshot = citySnapshot,
+)
+
+fun blockStateEntity(
+    id: String = "b-1",
+    documentationId: String = "d-1",
+    blockDefinitionId: String = "wundart",
+    title: String = "Wundart",
+    order: Int = 1,
+    updatedAt: Long = 1_000L,
+) = BlockStateEntity(
+    id = id,
+    documentationId = documentationId,
+    blockDefinitionId = blockDefinitionId,
+    titleSnapshot = title,
+    blockOrder = order,
+    updatedAt = updatedAt,
+)
+
+fun checkItemStateEntity(
+    id: String = "c-1",
+    blockStateId: String = "b-1",
+    definitionId: String = "item_1",
+    label: String = "Eintrag 1",
+    order: Int = 1,
+    checked: Boolean = false,
+    isFreeText: Boolean = false,
+    freeTextValue: String = "",
+    isStaticHint: Boolean = false,
+    inputSpec: String = "",
+) = CheckItemStateEntity(
+    id = id,
+    blockStateId = blockStateId,
+    checkItemDefinitionId = definitionId,
+    labelSnapshot = label,
+    itemOrder = order,
+    checked = checked,
+    isFreeText = isFreeText,
+    freeTextValue = freeTextValue,
+    isStaticHint = isStaticHint,
+    inputSpec = inputSpec,
+)
+
+fun photoEntity(
+    id: String = "ph-1",
+    documentationId: String = "d-1",
+    fileName: String = "foto.jpg",
+    orderIndex: Int = 0,
+    createdAt: Long = 1_000L,
+) = PhotoEntity(
+    id = id,
+    documentationId = documentationId,
+    fileName = fileName,
+    orderIndex = orderIndex,
+    createdAt = createdAt,
+)
+
+fun signatureEntity(
+    id: String = "s-1",
+    documentationId: String = "d-1",
+    signerName: String = "Anna Schmidt",
+    fileName: String = "unterschrift.png",
+    orderIndex: Int = 0,
+    createdAt: Long = 1_000L,
+) = SignatureEntity(
+    id = id,
+    documentationId = documentationId,
+    signerName = signerName,
+    fileName = fileName,
+    orderIndex = orderIndex,
+    createdAt = createdAt,
+)
+
+fun woundCarerEntity(
+    id: String = "w-1",
+    name: String = "Anna Schmidt",
+    signatureFileName: String = "w-sig.png",
+    updatedAt: Long = 1_000L,
+) = WoundCarerEntity(
+    id = id,
+    name = name,
+    signatureFileName = signatureFileName,
+    updatedAt = updatedAt,
+)

app/src/androidTest/java/de/medapp/wunddoku/testutil/RoomTestBase.kt

@@ -0,0 +1,107 @@
+package de.medapp.wunddoku.testutil
+
+import androidx.room.Room
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import de.medapp.wunddoku.data.dao.BlockStateDao
+import de.medapp.wunddoku.data.dao.CheckItemStateDao
+import de.medapp.wunddoku.data.dao.DocumentationDao
+import de.medapp.wunddoku.data.dao.PatientDao
+import de.medapp.wunddoku.data.dao.PhotoDao
+import de.medapp.wunddoku.data.dao.SignatureDao
+import de.medapp.wunddoku.data.dao.WoundCarerDao
+import de.medapp.wunddoku.data.database.AppDatabase
+import de.medapp.wunddoku.data.entity.DocumentationEntity
+import de.medapp.wunddoku.data.entity.PatientEntity
+import de.medapp.wunddoku.domain.model.DocumentationStatus
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.withTimeout
+import org.junit.After
+import org.junit.Before
+import org.junit.runner.RunWith
+
+/**
+ * Basisklasse für alle Room-Tests (QA-002): echte In-Memory-Datenbank mit demselben Schema,
+ * denselben Foreign Keys und denselben Indizes wie in Produktion. Jeder Test bekommt eine
+ * frische, leere Datenbank.
+ */
+@RunWith(AndroidJUnit4::class)
+abstract class RoomTestBase {
+
+    protected lateinit var db: AppDatabase
+
+    protected val patientDao: PatientDao get() = db.patientDao()
+    protected val documentationDao: DocumentationDao get() = db.documentationDao()
+    protected val blockStateDao: BlockStateDao get() = db.blockStateDao()
+    protected val checkItemStateDao: CheckItemStateDao get() = db.checkItemStateDao()
+    protected val photoDao: PhotoDao get() = db.photoDao()
+    protected val signatureDao: SignatureDao get() = db.signatureDao()
+    protected val woundCarerDao: WoundCarerDao get() = db.woundCarerDao()
+
+    @Before
+    fun createDatabase() {
+        db = Room.inMemoryDatabaseBuilder(
+            InstrumentationRegistry.getInstrumentation().targetContext,
+            AppDatabase::class.java,
+        ).build()
+    }
+
+    @After
+    fun closeDatabase() {
+        db.close()
+    }
+
+    // --- Seed-Helfer ---------------------------------------------------------------------
+
+    protected suspend fun seedPatient(
+        id: String = "p-1",
+        firstName: String = "Max",
+        lastName: String = "Mustermann",
+        birthDate: String = "1980-03-14",
+    ): PatientEntity {
+        val entity = patientEntity(id = id, firstName = firstName, lastName = lastName, birthDate = birthDate)
+        patientDao.insert(entity)
+        return entity
+    }
+
+    /** Legt eine Dokumentation an; fehlt der Patient, wird er mit Standarddaten angelegt. */
+    protected suspend fun seedDocumentation(
+        id: String = "d-1",
+        patientId: String = "p-1",
+        createdAt: Long = 1_000L,
+        status: DocumentationStatus = DocumentationStatus.IN_PROGRESS,
+    ): DocumentationEntity {
+        if (patientDao.getById(patientId) == null) seedPatient(id = patientId)
+        val entity = documentationEntity(id = id, patientId = patientId, createdAt = createdAt, status = status)
+        documentationDao.insert(entity)
+        return entity
+    }
+
+    // --- Roh-SQL-Helfer (unabhängig von DAO-Logik prüfen, was wirklich in der DB steht) ----
+
+    protected fun queryInt(sql: String): Int =
+        db.openHelper.readableDatabase.query(sql).use { cursor ->
+            cursor.moveToFirst()
+            cursor.getInt(0)
+        }
+
+    protected fun queryString(sql: String): String =
+        db.openHelper.readableDatabase.query(sql).use { cursor ->
+            cursor.moveToFirst()
+            cursor.getString(0)
+        }
+
+    protected fun countRows(table: String): Int = queryInt("SELECT COUNT(*) FROM $table")
+
+    protected fun execSql(sql: String) {
+        db.openHelper.writableDatabase.execSQL(sql)
+    }
+}
+
+/**
+ * Wartet (mit Timeout), bis ein Flow einen Wert liefert, der [predicate] erfüllt.
+ * Robust für Reaktivitäts-Tests, egal ob Änderung vor oder nach dem ersten Emit passiert.
+ */
+suspend fun <T> Flow<T>.awaitMatching(timeoutMs: Long = 5_000L, predicate: (T) -> Boolean): T =
+    withTimeout(timeoutMs) { first { predicate(it) } }