fix(app-phone): персистентный статус скачивания + докачка с места обрыва + StatusBlock

- DownloadManager: .part-файлы, resume через Range (206/200), status.json (фаза/процент/total), скан диска при старте, guard от повторной качки - DetailsScreen: кнопка «✓ скачано на телефон»/«Продолжить (N%)», чипы из диска - Components: StatusBlock Box→Column (строки статуса перекрывались кнопкой «Удалить»); приоритет бейджа: «✓» done выше «↓ часть» - 8 новых тестов (Range, скан диска, status.json)
2026-08-19 13:46:03 +03:00
parent 6069400b88
commit 724f90a385
4 changed files with 398 additions and 42 deletions
@@ -0,0 +1,118 @@
+package pw.binom.viewmate.phone
+
+import kotlinx.serialization.encodeToString
+import java.io.File
+import java.nio.file.Files
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+
+class DownloadManagerTest {
+
+    private fun tempDir(): File = Files.createTempDirectory("dm-test").toFile()
+
+    private fun newBaseDir(): File {
+        val base = tempDir()
+        base.deleteOnExit()
+        return base
+    }
+
+    @Test
+    fun rangeHeaderFormedFromPartSize() {
+        val noResume = requestFor("https://s3/mirror/video.mkv", 0)
+        assertNull(noResume.header("Range"), "без .part Range-заголовка быть не должно")
+
+        val resume = requestFor("https://s3/mirror/video.mkv", 1_863_946_240)
+        assertEquals("bytes=1863946240-", resume.header("Range"))
+    }
+
+    @Test
+    fun scanFullFileMarksDownloadedAndRemovesPart() {
+        val base = newBaseDir()
+        val dir = File(base, "i1").apply { mkdirs() }
+        File(dir, "video.mkv").writeBytes(ByteArray(10))
+        File(dir, "video.mkv.part").writeBytes(ByteArray(5)) // оставшийся после рестарта
+
+        val result = scanDownloads(base, emptyMap())
+
+        assertEquals(setOf("i1"), result.downloaded)
+        assertTrue(result.progress.isEmpty())
+        assertTrue(!File(dir, "video.mkv.part").exists(), ".part при наличии полного файла удаляется")
+    }
+
+    @Test
+    fun scanPartOnlyMarksDownloadingWithPercent() {
+        val base = newBaseDir()
+        val dir = File(base, "i2").apply { mkdirs() }
+        File(dir, "video.mkv.part").writeBytes(ByteArray(500))
+        val saved = mapOf("i2" to DownloadStatus(totalBytes = 1000))
+
+        val result = scanDownloads(base, saved)
+
+        assertTrue(result.downloaded.isEmpty())
+        assertEquals(
+            DownloadProgress("i2", DownloadPhase.DOWNLOADING, 50, "видео"),
+            result.progress["i2"],
+        )
+    }
+
+    @Test
+    fun scanPartWithoutTotalHasZeroPercent() {
+        val base = newBaseDir()
+        val dir = File(base, "i3").apply { mkdirs() }
+        File(dir, "video.mkv.part").writeBytes(ByteArray(500))
+
+        val result = scanDownloads(base, emptyMap())
+
+        assertEquals(DownloadProgress("i3", DownloadPhase.DOWNLOADING, 0, "видео"), result.progress["i3"])
+    }
+
+    @Test
+    fun statusFileWritesAndReads() {
+        val file = File(tempDir(), "status.json")
+        val store = DownloadStatusStore(file)
+        val statuses = mapOf(
+            "i1" to DownloadStatus(phase = "downloading", stage = "видео", percent = 42, totalBytes = 1_000_000, updatedAt = 1234L),
+            "i2" to DownloadStatus(phase = "done", percent = 100, totalBytes = 500, updatedAt = 5678L),
+        )
+
+        store.write(statuses)
+        val read = store.read()
+
+        assertEquals(statuses, read)
+        assertTrue(file.exists())
+    }
+
+    @Test
+    fun statusFileMissingReadsEmpty() {
+        val store = DownloadStatusStore(File(tempDir(), "status.json"))
+        assertTrue(store.read().isEmpty())
+    }
+
+    @Test
+    fun statusSerializationMatchesSpecKeys() {
+        val text = statusJson.encodeToString(
+            mapOf("i1" to DownloadStatus(phase = "downloading", stage = "видео", percent = 50, totalBytes = 100, updatedAt = 42L)),
+        )
+        assertTrue(text.contains("\"phase\""))
+        assertTrue(text.contains("\"stage\""))
+        assertTrue(text.contains("\"percent\""))
+        assertTrue(text.contains("\"totalBytes\""))
+        assertTrue(text.contains("\"updatedAt\""))
+        assertTrue(text.contains("\"downloading\""))
+        assertTrue(text.contains("\"видео\""))
+    }
+
+    @Test
+    fun scanIgnoresNonPartFilesWithoutFinalVideo() {
+        val base = newBaseDir()
+        val dir = File(base, "i4").apply { mkdirs() }
+        File(dir, "some-random.bin").writeBytes(ByteArray(10))
+
+        val result = scanDownloads(base, emptyMap())
+
+        assertTrue(result.downloaded.isEmpty())
+        assertTrue(result.progress.isEmpty())
+    }
+}