Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | 36x 36x 36x 25x 25x 28x 53x 25x 25x 36x 31x 6x 6x 6x 25x 25x 31x 31x 25x 82x 36x 28x 36x 36x 36x 36x 36x 13x 36x 35x 35x 36x 36x 14x 14x 11x 11x 11x 11x 36x 36x | import { vi } from "vitest";
/**
* A fake camera stack for the React-layer tests.
*
* jsdom has no `getUserMedia`, no `<video>` playback and no frame callbacks, so
* the scanner's loop would never run at all. These doubles supply exactly the
* pieces the loop touches — and, importantly, let a test *drive* frames rather
* than wait for them, so nothing here depends on timing.
*/
export interface FakeCamera {
/** Every track handed out, so a test can assert none survived. */
readonly tracks: FakeTrack[];
getUserMedia: ReturnType<typeof vi.fn>;
enumerateDevices: ReturnType<typeof vi.fn>;
/** Advance the video element by one presented frame. */
emitFrame(): void;
/** Fire `loadedmetadata`, as a stream announcing its dimensions does. */
emitMetadata(video: HTMLVideoElement, width: number, height: number): void;
restore(): void;
}
export interface FakeTrack {
kind: string;
readyState: string;
stop: ReturnType<typeof vi.fn>;
getSettings: () => MediaTrackSettings;
getCapabilities: () => MediaTrackCapabilities;
applyConstraints: ReturnType<typeof vi.fn>;
}
export interface FakeCameraOptions {
devices?: Array<{ deviceId: string; label?: string }>;
torch?: boolean;
/** Reject with this `DOMException` name instead of granting. */
failWith?: string;
}
export function installFakeCamera(options: FakeCameraOptions = {}): FakeCamera {
const tracks: FakeTrack[] = [];
const frameCallbacks: Array<() => void> = [];
const makeTrack = (deviceId: string): FakeTrack => {
const track: FakeTrack = {
kind: "video",
readyState: "live",
stop: vi.fn(() => {
track.readyState = "ended";
}),
getSettings: () => ({ deviceId }) as MediaTrackSettings,
getCapabilities: () =>
(options.torch ? { torch: true } : {}) as MediaTrackCapabilities,
applyConstraints: vi.fn(async () => {}),
};
tracks.push(track);
return track;
};
const getUserMedia = vi.fn(async (constraints: MediaStreamConstraints) => {
if (options.failWith) {
const error = new Error(options.failWith);
error.name = options.failWith;
throw error;
}
const video = constraints.video;
const requested =
typeof video === "object" && video && "deviceId" in video
? ((video.deviceId as { exact?: string })?.exact ?? "cam-1")
: (options.devices?.[0]?.deviceId ?? "cam-1");
const track = makeTrack(requested);
return {
getTracks: () => [track],
getVideoTracks: () => [track],
} as unknown as MediaStream;
});
const enumerateDevices = vi.fn(async () =>
(options.devices ?? [{ deviceId: "cam-1" }]).map(
(device) =>
({
deviceId: device.deviceId,
label: device.label ?? "",
kind: "videoinput",
groupId: "g",
}) as MediaDeviceInfo,
),
);
vi.stubGlobal("navigator", {
...globalThis.navigator,
mediaDevices: {
getUserMedia,
enumerateDevices,
addEventListener: () => {},
removeEventListener: () => {},
},
});
// `<video>` in jsdom never plays and never reports a size.
const videoProto = globalThis.HTMLVideoElement.prototype;
const originalPlay = videoProto.play;
videoProto.play = vi.fn(async () => {}) as typeof videoProto.play;
Object.defineProperty(videoProto, "readyState", {
configurable: true,
get(this: HTMLVideoElement & { _readyState?: number }) {
return this._readyState ?? 0;
},
});
// The scanner prefers `requestVideoFrameCallback`; wiring it to a queue the
// test drains is what makes these tests deterministic instead of timed.
(videoProto as unknown as { requestVideoFrameCallback: unknown }).requestVideoFrameCallback = vi.fn(
(callback: () => void) => {
frameCallbacks.push(callback);
return frameCallbacks.length;
},
);
(videoProto as unknown as { cancelVideoFrameCallback: unknown }).cancelVideoFrameCallback = vi.fn();
return {
tracks,
getUserMedia,
enumerateDevices,
emitFrame() {
const pending = frameCallbacks.splice(0, frameCallbacks.length);
for (const callback of pending) callback();
},
emitMetadata(video, width, height) {
Object.defineProperty(video, "videoWidth", { configurable: true, value: width });
Object.defineProperty(video, "videoHeight", { configurable: true, value: height });
(video as HTMLVideoElement & { _readyState?: number })._readyState = 4;
video.dispatchEvent(new Event("loadedmetadata"));
},
restore() {
videoProto.play = originalPlay;
vi.unstubAllGlobals();
},
};
}
|