57 lines
2.1 KiB
TypeScript
57 lines
2.1 KiB
TypeScript
import { afterEach, beforeEach, expect, it, vi } from "vitest";
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let processor: AudioWorkletProcessor;
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const port = { onmessage: undefined as ((event: MessageEvent) => void) | undefined, postMessage: vi.fn() };
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beforeEach(async () => {
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vi.resetModules();
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port.postMessage.mockClear();
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vi.stubGlobal("sampleRate", 48000);
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vi.stubGlobal(
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"AudioWorkletProcessor",
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class {
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port = port;
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},
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);
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vi.stubGlobal("registerProcessor", (_name: string, Processor: new () => AudioWorkletProcessor) => {
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processor = new Processor();
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});
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await import("./audio-playback.worklet");
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});
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afterEach(() => {
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vi.unstubAllGlobals();
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});
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function send(data: unknown) {
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port.onmessage?.(new MessageEvent("message", { data }));
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}
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function render(blocks: number) {
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let audible = false;
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for (let index = 0; index < blocks; index++) {
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const output = new Float32Array(128);
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processor.process([], [[output]]);
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audible ||= output.some((value) => value !== 0);
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}
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return audible;
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}
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it("flushes a final chunk shorter than the prebuffer and signals after playback finishes", () => {
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send({ kind: "audio", samples: new Float32Array(160).fill(0.5), sequence: 1 });
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expect(render(1)).toBe(false);
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expect(port.postMessage).not.toHaveBeenCalled();
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send({ kind: "finish", sequence: 1 });
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expect(render(1)).toBe(true);
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expect(port.postMessage).not.toHaveBeenCalled();
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render(12);
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expect(port.postMessage).toHaveBeenCalledExactlyOnceWith({ kind: "drained", sequence: 1 });
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});
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it("discards cleared samples and identifies the latest playback generation", () => {
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send({ kind: "audio", samples: new Float32Array(16000).fill(0.5), sequence: 1 });
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expect(render(1)).toBe(true);
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send({ kind: "clear", sequence: 2 });
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render(2);
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expect(port.postMessage).toHaveBeenLastCalledWith({ kind: "drained", sequence: 2 });
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expect(render(10)).toBe(false);
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send({ kind: "audio", samples: new Float32Array(160).fill(0.25), sequence: 3 });
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send({ kind: "finish", sequence: 3 });
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expect(render(12)).toBe(true);
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expect(port.postMessage).toHaveBeenLastCalledWith({ kind: "drained", sequence: 3 });
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});
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