1 files changed, 141 insertions, 0 deletions
diff --git a/apps/web/src/services/storage/migrations/__tests__/v19-to-v20.test.ts b/apps/web/src/services/storage/migrations/__tests__/v19-to-v20.test.ts
new file mode 100644
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+++ b/apps/web/src/services/storage/migrations/__tests__/v19-to-v20.test.ts
@@ -0,0 +1,141 @@
+import { describe, expect, test } from "bun:test";
+import { transformProjectV19ToV20 } from "../transformers/v19-to-v20";
+
+describe("V19 to V20 Migration", () => {
+	test("backfills source audio enabled state on video elements", () => {
+		const result = transformProjectV19ToV20({
+			project: {
+				id: "project-v19-source-audio",
+				version: 19,
+				metadata: {
+					id: "project-v19-source-audio",
+					name: "Project",
+					createdAt: "2024-01-01T00:00:00.000Z",
+					updatedAt: "2024-01-01T00:00:00.000Z",
+				},
+				settings: {
+					fps: 30,
+					canvasSize: { width: 1920, height: 1080 },
+					background: { type: "color", color: "#000000" },
+				},
+				currentSceneId: "scene-main",
+				scenes: [
+					{
+						id: "scene-main",
+						name: "Main",
+						isMain: true,
+						bookmarks: [],
+						createdAt: "2024-01-01T00:00:00.000Z",
+						updatedAt: "2024-01-01T00:00:00.000Z",
+						tracks: [
+							{
+								id: "track-video",
+								type: "video",
+								name: "Video",
+								isMain: true,
+								muted: false,
+								hidden: false,
+								elements: [
+									{
+										id: "video-1",
+										type: "video",
+										name: "Clip",
+										mediaId: "media-1",
+										duration: 5,
+										startTime: 0,
+										trimStart: 0,
+										trimEnd: 0,
+										transform: {
+											position: { x: 0, y: 0 },
+											scale: { x: 1, y: 1 },
+											rotation: 0,
+										},
+										opacity: 1,
+									},
+								],
+							},
+							{
+								id: "track-audio",
+								type: "audio",
+								name: "Audio",
+								muted: false,
+								elements: [
+									{
+										id: "audio-1",
+										type: "audio",
+										sourceType: "upload",
+										mediaId: "media-audio-1",
+										name: "Audio",
+										duration: 5,
+										startTime: 0,
+										trimStart: 0,
+										trimEnd: 0,
+										volume: 0,
+									},
+								],
+							},
+						],
+					},
+				],
+			},
+		});
+
+		expect(result.skipped).toBe(false);
+		expect(result.project.version).toBe(20);
+		expect(
+			((result.project.scenes as Array<Record<string, unknown>>)[0]
+				.tracks as Array<Record<string, unknown>>)[0].elements,
+		).toEqual([
+			expect.objectContaining({
+				id: "video-1",
+				isSourceAudioEnabled: true,
+			}),
+		]);
+		expect(
+			(((result.project.scenes as Array<Record<string, unknown>>)[0]
+				.tracks as Array<Record<string, unknown>>)[1]
+				.elements as Array<Record<string, unknown>>)[0].isSourceAudioEnabled,
+		).toBeUndefined();
+	});
+
+	test("preserves existing explicit source audio state", () => {
+		const result = transformProjectV19ToV20({
+			project: {
+				id: "project-v19-existing-state",
+				version: 19,
+				scenes: [
+					{
+						tracks: [
+							{
+								elements: [
+									{
+										type: "video",
+										isSourceAudioEnabled: false,
+									},
+								],
+							},
+						],
+					},
+				],
+			},
+		});
+
+		expect(
+			(((result.project.scenes as Array<Record<string, unknown>>)[0]
+				.tracks as Array<Record<string, unknown>>)[0]
+				.elements as Array<Record<string, unknown>>)[0].isSourceAudioEnabled,
+		).toBe(false);
+	});
+
+	test("skips projects already on v20", () => {
+		const result = transformProjectV19ToV20({
+			project: {
+				id: "project-v20",
+				version: 20,
+			},
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("already v20");
+	});
+});