From e356c173157f398a48c661c04c2e94eb3f5a74ab Mon Sep 17 00:00:00 2001
From: Paul Kaplan <pkaplan@media.mit.edu>
Date: Fri, 4 Aug 2017 13:54:13 -0400
Subject: [PATCH] Add tests for the audio effects
---
test/unit/util/audio-effects.test.js | 59 ++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
create mode 100644 test/unit/util/audio-effects.test.js
diff --git a/test/unit/util/audio-effects.test.js b/test/unit/util/audio-effects.test.js
new file mode 100644
index 000000000..b70ea2f40
--- /dev/null
+++ b/test/unit/util/audio-effects.test.js
@@ -0,0 +1,59 @@
+/* eslint-env jest */
+/* global AudioNode AudioContext WebAudioTestAPI */
+import 'web-audio-test-api';
+WebAudioTestAPI.setState({
+ 'OfflineAudioContext#startRendering': 'promise'
+});
+
+import AudioEffects from '../../../src/lib/audio/audio-effects';
+import RobotEffect from '../../../src/lib/audio/effects/robot-effect';
+import EchoEffect from '../../../src/lib/audio/effects/echo-effect';
+import VolumeEffect from '../../../src/lib/audio/effects/volume-effect';
+
+describe('Audio Effects manager', () => {
+ let audioContext = new AudioContext();
+ let audioBuffer = audioContext.createBuffer(1, 400, 44100);
+
+ test('changes buffer length and playback rate for faster effect', () => {
+ const audioEffects = new AudioEffects(audioBuffer, 'faster');
+ expect(audioEffects.audioContext._.length).toEqual(Math.floor(400 / 1.5));
+ expect(audioEffects.source.playbackRate.value).toEqual(1.5);
+ });
+
+ test('changes buffer length and playback rate for slower effect', () => {
+ const audioEffects = new AudioEffects(audioBuffer, 'slower');
+ expect(audioEffects.audioContext._.length).toEqual(Math.floor(400 / 0.5));
+ expect(audioEffects.source.playbackRate.value).toEqual(0.5);
+ });
+
+ test('changes buffer length for echo effect', () => {
+ const audioEffects = new AudioEffects(audioBuffer, 'echo');
+ expect(audioEffects.audioContext._.length).toBeGreaterThan(400);
+ });
+
+ test.skip('process starts the offline rendering context and returns a promise', () => {
+ // @todo haven't been able to get web audio test api to actually run render
+ });
+});
+
+describe('Effects', () => {
+ let audioContext;
+
+ beforeEach(() => {
+ audioContext = new AudioContext();
+ });
+
+ test('all effects provide an input and output that are connected', () => {
+ const robotEffect = new RobotEffect(audioContext, 0.5);
+ expect(robotEffect.input).toBeInstanceOf(AudioNode);
+ expect(robotEffect.output).toBeInstanceOf(AudioNode);
+
+ const echoEffect = new EchoEffect(audioContext, 0.5);
+ expect(echoEffect.input).toBeInstanceOf(AudioNode);
+ expect(echoEffect.output).toBeInstanceOf(AudioNode);
+
+ const volumeEffect = new VolumeEffect(audioContext, 0.5);
+ expect(volumeEffect.input).toBeInstanceOf(AudioNode);
+ expect(volumeEffect.output).toBeInstanceOf(AudioNode);
+ });
+});
--
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