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import { beforeEach, describe, expect, test } from "bun:test";
import { EditorCore } from "@/core";
import {
AddMediaAssetCommand,
BatchCommand,
InsertElementCommand,
} from "@/commands";
import { buildDefaultScene } from "@/timeline/scenes";
import { buildElementFromMedia } from "@/timeline";
import { mediaTimeFromSeconds, ZERO_MEDIA_TIME, type MediaTime } from "@/wasm";
import { storageService } from "@/services/storage/service";
const RECORDING_DURATION_SECONDS = 12.5;
const RECORDING_DURATION = mediaTimeFromSeconds({
seconds: RECORDING_DURATION_SECONDS,
});
const PLAYHEAD_TIME = mediaTimeFromSeconds({ seconds: 2 });
function seedEditorWithEmptyScene(): EditorCore {
const editor = EditorCore.getInstance();
const scene = buildDefaultScene({ name: "Main scene", isMain: true });
editor.project.setActiveProject({
project: {
metadata: {
id: "project-1",
name: "Test project",
duration: ZERO_MEDIA_TIME,
createdAt: new Date("2026-01-01T00:00:00Z"),
updatedAt: new Date("2026-01-01T00:00:00Z"),
},
scenes: [scene],
currentSceneId: scene.id,
settings: {
fps: { numerator: 30, denominator: 1 },
canvasSize: { width: 1920, height: 1080 },
background: { type: "color", color: "#000000" },
},
version: 1,
},
});
editor.scenes.setScenes({ scenes: [scene], activeSceneId: scene.id });
editor.media.setAssets({ assets: [] });
return editor;
}
/**
* Mirrors the stop-recording branch of the "voice-over" action handler in
* use-editor-actions.ts: one undoable batch that adds the recorded audio as a
* media asset and inserts it at the playhead with automatic audio placement.
*/
function buildVoiceOverBatch({
projectId,
startTime,
}: {
projectId: string;
startTime: MediaTime;
}): { batch: BatchCommand; assetId: string } {
const file = new File([new Blob(["fake-audio"])], "voice-over.webm", {
type: "audio/webm",
});
const addMediaCommand = new AddMediaAssetCommand({
projectId,
asset: {
file,
name: "Voice over",
type: "audio",
url: "blob:voice-over-test",
duration: RECORDING_DURATION_SECONDS,
},
});
const insertCommand = new InsertElementCommand({
element: buildElementFromMedia({
mediaId: addMediaCommand.getAssetId(),
mediaType: "audio",
name: "Voice over",
duration: RECORDING_DURATION,
startTime,
}),
placement: { mode: "auto", trackType: "audio" },
});
return {
batch: new BatchCommand([addMediaCommand, insertCommand]),
assetId: addMediaCommand.getAssetId(),
};
}
describe("voice-over batch command", () => {
beforeEach(() => {
EditorCore.reset();
// IndexedDB is unavailable under bun:test; the command treats a failed
// save as fatal and rolls back the asset, so stub persistence out.
storageService.saveMediaAsset = () => Promise.resolve();
storageService.deleteMediaAsset = () => Promise.resolve();
});
test("adds an audio asset and inserts it on a new audio track at the playhead", () => {
const editor = seedEditorWithEmptyScene();
const { batch, assetId } = buildVoiceOverBatch({
projectId: "project-1",
startTime: PLAYHEAD_TIME,
});
batch.execute();
const assets = editor.media.getAssets();
expect(assets).toHaveLength(1);
expect(assets[0].id).toBe(assetId);
expect(assets[0].type).toBe("audio");
expect(assets[0].name).toBe("Voice over");
expect(assets[0].duration).toBe(RECORDING_DURATION_SECONDS);
const { tracks } = editor.scenes.getActiveScene();
expect(tracks.audio).toHaveLength(1);
expect(tracks.audio[0].elements).toHaveLength(1);
const element = tracks.audio[0].elements[0];
expect(element.type).toBe("audio");
expect(element.startTime).toBe(PLAYHEAD_TIME);
expect(element.duration).toBe(RECORDING_DURATION);
if (element.type === "audio" && element.sourceType === "upload") {
expect(element.mediaId).toBe(assetId);
} else {
throw new Error("expected an upload audio element");
}
});
test("undo removes both the element and the asset as a single step", () => {
const editor = seedEditorWithEmptyScene();
const { batch } = buildVoiceOverBatch({
projectId: "project-1",
startTime: PLAYHEAD_TIME,
});
batch.execute();
batch.undo();
expect(editor.media.getAssets()).toHaveLength(0);
const { tracks } = editor.scenes.getActiveScene();
expect(
tracks.audio.flatMap((track) => track.elements),
).toHaveLength(0);
});
test("redo re-inserts the element and restores the asset", () => {
const editor = seedEditorWithEmptyScene();
const { batch, assetId } = buildVoiceOverBatch({
projectId: "project-1",
startTime: PLAYHEAD_TIME,
});
batch.execute();
batch.undo();
batch.redo();
expect(editor.media.getAssets().map((asset) => asset.id)).toEqual([
assetId,
]);
const { tracks } = editor.scenes.getActiveScene();
const elements = tracks.audio.flatMap((track) => track.elements);
expect(elements).toHaveLength(1);
expect(elements[0].startTime).toBe(PLAYHEAD_TIME);
});
test("reuses an existing audio track when the slot is free", () => {
const editor = seedEditorWithEmptyScene();
const first = buildVoiceOverBatch({
projectId: "project-1",
startTime: PLAYHEAD_TIME,
});
first.batch.execute();
const secondStart = mediaTimeFromSeconds({
seconds: 2 + RECORDING_DURATION_SECONDS + 1,
});
const second = buildVoiceOverBatch({
projectId: "project-1",
startTime: secondStart,
});
second.batch.execute();
const { tracks } = editor.scenes.getActiveScene();
expect(tracks.audio).toHaveLength(1);
expect(tracks.audio[0].elements).toHaveLength(2);
expect(
tracks.audio[0].elements.map((element) => element.startTime),
).toEqual([PLAYHEAD_TIME, secondStart]);
});
});
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