test: separate test scripts

test/ffmpeg.test.js

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+/* eslint-disable */
+
+const fs = require('fs');
+const prism = require('../');
+const { promisify } = require('util');
+const readFile = promisify(fs.readFile);
+const { roughlyEquals, streamToBuffer } = require('./util');
+
+test('FFmpeg transcoder available', () => {
+  expect(prism.FFmpeg).toBeTruthy();
+});
+
+test('FFmpeg transcoder to PCM is sane', async done => {
+  expect.assertions(1);
+  const output = fs.createReadStream('./test/audio/speech_orig.ogg')
+    .pipe(new prism.FFmpeg({
+      args: [
+        '-analyzeduration', '0',
+        '-loglevel', '0',
+        '-f', 's16le',
+        '-ar', '48000',
+        '-ac', '2',
+      ],
+    }));
+  const chunks = await streamToBuffer(output);
+  const file = await readFile('./test/audio/speech_orig.pcm');
+  expect(roughlyEquals(file, chunks)).toEqual(true);
+  done();
+});

test/opus.test.js

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+/* eslint-disable */
+
+const fs = require('fs');
+const prism = require('../');
+const { promisify } = require('util');
+const readFile = promisify(fs.readFile);
+const { roughlyEquals, streamToBuffer } = require('./util');
+
+test('OggOpus Demuxer available', () => {
+  expect(prism.OggOpusDemuxer).toBeTruthy();
+});
+
+test('WebmOpus Demuxer available', () => {
+  expect(prism.WebmOpusDemuxer).toBeTruthy();
+  expect(prism.WebmOpusDemuxer.TOO_SHORT).toBeTruthy();
+  expect(prism.WebmOpusDemuxer.TAGS).toBeTruthy();
+});
+
+test('Opus encoders/decoders available', () => {
+  expect(prism.opus).toBeTruthy();
+  expect(prism.opus.Encoder).toBeTruthy();
+  expect(prism.opus.Decoder).toBeTruthy();
+});
+
+test('OggOpus demuxer is sane', async done => {
+  expect.assertions(1);
+  const output = fs.createReadStream('./test/audio/speech_orig.ogg').pipe(new prism.OggOpusDemuxer());
+  const chunks = await streamToBuffer(output);
+  const file = await readFile('./test/audio/speech_orig.opusdump');
+  expect(roughlyEquals(file, chunks)).toEqual(true);
+  done();
+});

test/util.js

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+// The output is slightly different on travis because of ffmpeg version, should account for it
+exports.roughlyEquals = function roughlyEquals(x, y) {
+  if (x.length !== y.length) return false;
+  for (let i = 0; i < x.length; i++) {
+    if (Math.abs(x[i] - y[i]) > 1) {
+      return false;
+    }
+  }
+  return true;
+};
+
+exports.streamToBuffer = function streamToBuffer(stream) {
+  return new Promise((resolve, reject) => {
+    let chunks = [];
+    stream.on('data', chunk => chunks.push(chunk));
+    stream.on('error', reject);
+    stream.on('end', () => resolve(Buffer.concat(chunks)));
+  });
+};

test/volumetransform.test.js

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+/* eslint-disable */
+
+const prism = require('../');
+
+test('Volume Transformers available', () => {
+  expect(prism.VolumeTransformer16LE).toBeTruthy();
+  expect(prism.VolumeTransformer16BE).toBeTruthy();
+  expect(prism.VolumeTransformer32LE).toBeTruthy();
+  expect(prism.VolumeTransformer32BE).toBeTruthy();
+});