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import { beforeEach, describe, expect, test } from "bun:test";
import { EditorCore } from "@/core";
import { buildDefaultScene } from "@/timeline/scenes";
import type { VideoElement } from "@/timeline";
import { mediaTimeFromSeconds, ZERO_MEDIA_TIME } from "@/wasm";
import { serializeProject } from "@/services/storage/service";
import { CURRENT_PROJECT_VERSION } from "@/services/storage/migrations";
import {
AUTO_CHECKPOINT_MIN_INTERVAL_MS,
AUTO_CHECKPOINT_RETENTION,
InMemoryVersionStore,
} from "@/versions";
const PROJECT_ID = "project-1";
const VIDEO_DURATION = mediaTimeFromSeconds({ seconds: 10 });
const SPLIT_TIME = mediaTimeFromSeconds({ seconds: 4 });
let nowMs = 1_000_000_000;
function buildVideoElement(): VideoElement {
return {
id: "video-1",
type: "video",
name: "video-1",
startTime: ZERO_MEDIA_TIME,
duration: VIDEO_DURATION,
trimStart: ZERO_MEDIA_TIME,
trimEnd: ZERO_MEDIA_TIME,
mediaId: "media-video-1",
params: {
"transform.positionX": 0,
"transform.positionY": 0,
"transform.scaleX": 1,
"transform.scaleY": 1,
"transform.rotate": 0,
opacity: 1,
},
};
}
function seedEditor(): { editor: EditorCore; store: InMemoryVersionStore } {
const editor = EditorCore.getInstance();
const store = new InMemoryVersionStore();
editor.versions.setStore({ store });
editor.versions.setNow({ now: () => nowMs });
const scene = buildDefaultScene({ name: "Main scene", isMain: true });
scene.tracks.main.elements = [buildVideoElement()];
editor.project.setActiveProject({
project: {
metadata: {
id: PROJECT_ID,
name: "Test project",
duration: VIDEO_DURATION,
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: CURRENT_PROJECT_VERSION,
},
});
editor.scenes.setScenes({ scenes: [scene], activeSceneId: scene.id });
return { editor, store };
}
function splitSeededVideo({ editor }: { editor: EditorCore }): void {
const scene = editor.scenes.getActiveScene();
editor.timeline.splitElements({
elements: [{ trackId: scene.tracks.main.id, elementId: "video-1" }],
splitTime: SPLIT_TIME,
});
}
describe("VersionsManager", () => {
beforeEach(() => {
EditorCore.reset();
});
test("restore round-trips the document through a named checkpoint", async () => {
const { editor } = seedEditor();
const version = await editor.versions.createNamedCheckpoint({
name: "v1",
});
expect(version).not.toBeNull();
if (!version) return;
splitSeededVideo({ editor });
expect(
editor.scenes.getActiveScene().tracks.main.elements,
).toHaveLength(2);
const didRestore = await editor.versions.restoreVersion({
versionId: version.id,
});
expect(didRestore).toBe(true);
const restored = editor.project.getActive();
expect(serializeProject({ project: restored })).toEqual(version.project);
});
test("restore writes a safety auto-checkpoint of the abandoned head", async () => {
const { editor, store } = seedEditor();
const version = await editor.versions.createNamedCheckpoint({
name: "v1",
});
expect(version).not.toBeNull();
if (!version) return;
nowMs += AUTO_CHECKPOINT_MIN_INTERVAL_MS;
splitSeededVideo({ editor });
const didRestore = await editor.versions.restoreVersion({
versionId: version.id,
});
expect(didRestore).toBe(true);
const stored = await store.getAllForProject({ projectId: PROJECT_ID });
const autos = stored.filter((candidate) => candidate.kind === "auto");
expect(autos).toHaveLength(1);
// The safety checkpoint captures the mutated (split) document…
const safetyScene = autos[0].project.scenes[0];
expect(safetyScene.tracks.main.elements).toHaveLength(2);
// …while the live document is back at the checkpointed state.
expect(
editor.scenes.getActiveScene().tracks.main.elements,
).toHaveLength(1);
});
test("auto-checkpoints rotate as a ring buffer and never evict named versions", async () => {
const { editor, store } = seedEditor();
nowMs += AUTO_CHECKPOINT_MIN_INTERVAL_MS;
expect(await editor.versions.writeAutoCheckpoint()).toBe(true);
const [firstAuto] = await store.getAllForProject({
projectId: PROJECT_ID,
});
for (let i = 0; i < AUTO_CHECKPOINT_RETENTION; i++) {
nowMs += AUTO_CHECKPOINT_MIN_INTERVAL_MS;
expect(await editor.versions.writeAutoCheckpoint()).toBe(true);
}
let stored = await store.getAllForProject({ projectId: PROJECT_ID });
let autos = stored.filter((candidate) => candidate.kind === "auto");
expect(autos).toHaveLength(AUTO_CHECKPOINT_RETENTION);
// The 21st write evicted the oldest auto-checkpoint.
expect(autos.some((candidate) => candidate.id === firstAuto.id)).toBe(
false,
);
const named = await editor.versions.createNamedCheckpoint({
name: "keep-me",
});
expect(named).not.toBeNull();
nowMs += AUTO_CHECKPOINT_MIN_INTERVAL_MS;
expect(await editor.versions.writeAutoCheckpoint()).toBe(true);
stored = await store.getAllForProject({ projectId: PROJECT_ID });
autos = stored.filter((candidate) => candidate.kind === "auto");
expect(autos).toHaveLength(AUTO_CHECKPOINT_RETENTION);
expect(
stored.some(
(candidate) => candidate.kind === "named" && candidate.name === "keep-me",
),
).toBe(true);
});
test("auto-checkpoints are throttled to one per interval", async () => {
const { editor, store } = seedEditor();
expect(await editor.versions.writeAutoCheckpoint()).toBe(true);
expect(await editor.versions.writeAutoCheckpoint()).toBe(false);
nowMs += AUTO_CHECKPOINT_MIN_INTERVAL_MS - 1;
expect(await editor.versions.writeAutoCheckpoint()).toBe(false);
nowMs += 1;
expect(await editor.versions.writeAutoCheckpoint()).toBe(true);
const stored = await store.getAllForProject({ projectId: PROJECT_ID });
const autos = stored.filter((candidate) => candidate.kind === "auto");
expect(autos).toHaveLength(2);
});
test("auto-checkpoints cannot be renamed or deleted", async () => {
const { editor } = seedEditor();
expect(await editor.versions.writeAutoCheckpoint()).toBe(true);
const [auto] = editor.versions.getVersions({ projectId: PROJECT_ID });
expect(auto.kind).toBe("auto");
expect(
await editor.versions.renameVersion({
versionId: auto.id,
name: "nope",
}),
).toBe(false);
expect(await editor.versions.deleteVersion({ versionId: auto.id })).toBe(
false,
);
expect(
editor.versions.getVersions({ projectId: PROJECT_ID }),
).toHaveLength(1);
});
test("named checkpoints can be renamed and deleted", async () => {
const { editor } = seedEditor();
const version = await editor.versions.createNamedCheckpoint({
name: "v1",
});
expect(version).not.toBeNull();
if (!version) return;
expect(
await editor.versions.renameVersion({
versionId: version.id,
name: "v1-final",
}),
).toBe(true);
expect(
editor.versions.getVersions({ projectId: PROJECT_ID })[0].name,
).toBe("v1-final");
expect(
await editor.versions.deleteVersion({ versionId: version.id }),
).toBe(true);
expect(
editor.versions.getVersions({ projectId: PROJECT_ID }),
).toHaveLength(0);
});
});
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