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import { describe, expect, test } from "bun:test";
import { upsertElementKeyframe } from "@/lib/animation";
import type { UploadAudioElement, VideoElement } from "@/lib/timeline";
import {
buildSeparatedAudioElement,
doesElementHaveEnabledAudio,
isSourceAudioEnabled,
isSourceAudioSeparated,
} from "..";
describe("audio separation", () => {
test("treats missing source audio state as enabled", () => {
const element = buildVideoElement({});
expect(isSourceAudioEnabled({ element })).toBe(true);
expect(isSourceAudioSeparated({ element })).toBe(false);
});
test("builds a detached audio element from the source clip audio state", () => {
const element = buildVideoElement({
duration: 8,
startTime: 3,
trimStart: 1.5,
trimEnd: 0.5,
sourceDuration: 12,
volume: -6,
muted: true,
retime: { rate: 1.25, maintainPitch: true },
animations: buildAnimations(),
});
const separatedAudioElement = buildSeparatedAudioElement({
sourceElement: element,
});
expect(separatedAudioElement).toMatchObject({
type: "audio",
sourceType: "upload",
mediaId: element.mediaId,
name: element.name,
duration: 8,
startTime: 3,
trimStart: 1.5,
trimEnd: 0.5,
sourceDuration: 12,
volume: -6,
muted: true,
retime: { rate: 1.25, maintainPitch: true },
});
expect(Object.keys(separatedAudioElement.animations?.bindings ?? {})).toEqual([
"volume",
]);
expect(Object.keys(separatedAudioElement.animations?.channels ?? {})).toEqual([
"volume:value",
]);
expect(
separatedAudioElement.animations?.channels["volume:value"]?.keys[0]?.id,
).not.toBe("volume-keyframe");
});
test("skips source audio collection when the source clip is separated", () => {
const mediaAsset = { hasAudio: true };
const videoElement = buildVideoElement({
isSourceAudioEnabled: false,
});
const audioElement = buildAudioElement();
expect(
doesElementHaveEnabledAudio({
element: videoElement,
mediaAsset,
}),
).toBe(false);
expect(
doesElementHaveEnabledAudio({
element: audioElement,
}),
).toBe(true);
});
});
function buildVideoElement(
overrides: Partial<VideoElement>,
): VideoElement {
return {
id: "video-1",
type: "video",
mediaId: "media-1",
name: "Clip",
duration: 5,
startTime: 0,
trimStart: 0,
trimEnd: 0,
volume: 0,
muted: false,
isSourceAudioEnabled: true,
transform: {
scaleX: 1,
scaleY: 1,
position: { x: 0, y: 0 },
rotate: 0,
},
opacity: 1,
...overrides,
};
}
function buildAudioElement(
overrides: Partial<UploadAudioElement> = {},
): UploadAudioElement {
return {
id: "audio-1",
type: "audio",
sourceType: "upload",
mediaId: "audio-media-1",
name: "Detached audio",
duration: 5,
startTime: 0,
trimStart: 0,
trimEnd: 0,
volume: 0,
...overrides,
} satisfies UploadAudioElement;
}
function buildAnimations() {
const withVolume = upsertElementKeyframe({
animations: undefined,
propertyPath: "volume",
time: 2,
value: -12,
interpolation: "linear",
keyframeId: "volume-keyframe",
});
return upsertElementKeyframe({
animations: withVolume,
propertyPath: "opacity",
time: 1,
value: 0.5,
interpolation: "linear",
keyframeId: "opacity-keyframe",
});
}
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