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import { describe, expect, test } from "bun:test";
import { buildScene } from "@/services/renderer/scene-builder";
import { ImageNode } from "@/services/renderer/nodes/image-node";
import type { ImageElement, SceneTracks } from "@/timeline";
import type { MediaAsset } from "@/media/types";
import {
mediaTime,
type MediaTime,
TICKS_PER_SECOND,
ZERO_MEDIA_TIME,
} from "@/wasm";
function imageElement({
id,
mediaId,
startTime,
transitionDuration = 0,
}: {
id: string;
mediaId: string;
startTime: MediaTime;
transitionDuration?: number;
}): ImageElement {
return {
id,
name: id,
type: "image",
mediaId,
startTime,
duration: mediaTime({ ticks: 2 * TICKS_PER_SECOND }),
trimStart: ZERO_MEDIA_TIME,
trimEnd: ZERO_MEDIA_TIME,
params: {
"transform.positionX": 0,
"transform.positionY": 0,
"transform.scaleX": 1,
"transform.scaleY": 1,
"transform.rotate": 0,
opacity: 1,
blendMode: "normal",
"transition.kind": "fade",
"transition.inDuration": transitionDuration,
"transition.outDuration": 0,
},
};
}
function imageAsset(id: string): MediaAsset {
return {
id,
name: id,
type: "image",
file: new File([], `${id}.png`, { type: "image/png" }),
url: `blob:${id}`,
};
}
describe("scene transition boundaries", () => {
test("holds the outgoing slide through the incoming transition", () => {
const first = imageElement({
id: "first",
mediaId: "media-first",
startTime: ZERO_MEDIA_TIME,
});
const second = imageElement({
id: "second",
mediaId: "media-second",
startTime: mediaTime({ ticks: 3 * TICKS_PER_SECOND }),
transitionDuration: 1,
});
const tracks: SceneTracks = {
overlay: [],
main: {
id: "main",
name: "Main Track",
type: "video",
elements: [first, second],
muted: false,
hidden: false,
},
audio: [],
};
const scene = buildScene({
canvasSize: { width: 1920, height: 1080 },
tracks,
mediaAssets: [imageAsset("media-first"), imageAsset("media-second")],
duration: 5 * TICKS_PER_SECOND,
background: { type: "color", color: "transparent" },
});
const imageNodes = scene.children.filter(
(node): node is ImageNode => node instanceof ImageNode,
);
expect(imageNodes).toHaveLength(2);
expect(imageNodes[0].params.contentDuration).toBe(2 * TICKS_PER_SECOND);
expect(imageNodes[0].params.duration).toBe(4 * TICKS_PER_SECOND);
expect(imageNodes[1].params.transition?.inDuration).toBe(TICKS_PER_SECOND);
});
});
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