103 lines
2.9 KiB
TypeScript
103 lines
2.9 KiB
TypeScript
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import { spawn } from "node:child_process";
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import { EventEmitter } from "node:events";
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import { describe, expect, it, vi } from "vitest";
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import { buildMuxFfmpegArgs, runFfmpeg } from "../../src/audio/ffmpegProcess";
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vi.mock("node:child_process", () => ({
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spawn: vi.fn(),
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}));
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const spawnMock = vi.mocked(spawn);
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describe("buildMuxFfmpegArgs", () => {
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it("builds args with multiple inputs and libmp3lame codec", () => {
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const args = buildMuxFfmpegArgs({
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inputs: ["a.ogg", "b.ogg"],
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filter:
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"[0:a]adelay=0|0[pad0];[1:a]adelay=1000|1000[pad1];[pad0][pad1]amix=inputs=2:dropout_transition=0[out]",
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output: "out.mp3",
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codec: "libmp3lame",
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});
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expect(args).toEqual([
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"-y",
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"-i",
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"a.ogg",
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"-i",
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"b.ogg",
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"-filter_complex",
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"[0:a]adelay=0|0[pad0];[1:a]adelay=1000|1000[pad1];[pad0][pad1]amix=inputs=2:dropout_transition=0[out]",
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"-map",
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"[out]",
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"-codec:a",
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"libmp3lame",
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"out.mp3",
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]);
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});
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it("includes audio frequency and channel options when provided", () => {
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const args = buildMuxFfmpegArgs({
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inputs: ["a.ogg"],
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filter:
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"[0:a]adelay=0|0[pad0];[pad0]amix=inputs=1:dropout_transition=0[out]",
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output: "out.wav",
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codec: "pcm_s16le",
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audioFrequency: 44100,
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audioChannels: 2,
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});
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expect(args).toContain("-ar");
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expect(args).toContain("44100");
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expect(args).toContain("-ac");
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expect(args).toContain("2");
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});
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it("does not include -ar or -ac when audioFrequency and audioChannels are not provided", () => {
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const args = buildMuxFfmpegArgs({
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inputs: ["a.ogg"],
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filter:
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"[0:a]adelay=0|0[pad0];[pad0]amix=inputs=1:dropout_transition=0[out]",
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output: "out.mp3",
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codec: "libmp3lame",
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});
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expect(args).not.toContain("-ar");
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expect(args).not.toContain("-ac");
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});
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});
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describe("runFfmpeg", () => {
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it("spawns ffmpeg and resolves on exit code 0", async () => {
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const proc = new EventEmitter();
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spawnMock.mockReturnValue(proc as ReturnType<typeof spawn>);
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const result = runFfmpeg(["-version"]);
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proc.emit("close", 0);
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await expect(result).resolves.toBeUndefined();
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expect(spawnMock).toHaveBeenCalledWith("ffmpeg", ["-version"], {
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stdio: ["ignore", "inherit", "inherit"],
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});
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});
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it("rejects on non-zero exit code", async () => {
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const proc = new EventEmitter();
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spawnMock.mockReturnValue(proc as ReturnType<typeof spawn>);
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const result = runFfmpeg(["-bad"]);
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proc.emit("close", 1);
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await expect(result).rejects.toThrow("ffmpeg exited with code 1");
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});
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it("rejects on spawn error", async () => {
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const proc = new EventEmitter();
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spawnMock.mockReturnValue(proc as ReturnType<typeof spawn>);
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const result = runFfmpeg(["-version"]);
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proc.emit("error", new Error("spawn ffmpeg ENOENT"));
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await expect(result).rejects.toThrow("spawn ffmpeg ENOENT");
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});
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});
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