| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>MediaElementAudioSourceNode constructor</title> |
| <link rel="help" href="https://webaudio.github.io/web-audio-api/#MediaElementAudioSourceNode"> |
| <link rel="help" href="https://webaudio.github.io/web-audio-api/#dom-mediaelementaudiosourcenode-mediaelementaudiosourcenode"> |
| <link rel="help" href="https://webaudio.github.io/web-audio-api/#MediaElementAudioSourceOptions"> |
| <script src="../../imported/w3c/web-platform-tests/resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <script> |
| "use strict"; |
| |
| test(t => { |
| const context = new AudioContext(); |
| t.add_cleanup(() => { context.close(); }); |
| const audio = new Audio(); |
| const node = new MediaElementAudioSourceNode(context, {mediaElement: audio}); |
| |
| assert_true(node instanceof MediaElementAudioSourceNode, |
| "constructed instance is a MediaElementAudioSourceNode"); |
| assert_equals(node.mediaElement, audio, |
| "options.mediaElement is exposed on the node and is the element re-routed by it"); |
| assert_equals(node.context, context, |
| "node is associated with the supplied BaseAudioContext"); |
| }, "MediaElementAudioSourceNode constructor associates the node with the given context and mediaElement"); |
| |
| test(t => { |
| const context = new AudioContext(); |
| t.add_cleanup(() => { context.close(); }); |
| const audio = new Audio(); |
| const node = new MediaElementAudioSourceNode(context, {mediaElement: audio}); |
| |
| assert_equals(node.numberOfInputs, 0, "numberOfInputs"); |
| assert_equals(node.numberOfOutputs, 1, "numberOfOutputs"); |
| assert_equals(node.channelCount, 2, "default channelCount"); |
| assert_equals(node.channelCountMode, "max", "default channelCountMode"); |
| assert_equals(node.channelInterpretation, "speakers", "default channelInterpretation"); |
| }, "MediaElementAudioSourceNode constructor sets default AudioNode parameters via 'initialize the AudioNode'"); |
| |
| test(t => { |
| const context = new AudioContext(); |
| t.add_cleanup(() => { context.close(); }); |
| |
| assert_throws_js(TypeError, |
| () => new MediaElementAudioSourceNode(context), |
| "missing options dictionary"); |
| assert_throws_js(TypeError, |
| () => new MediaElementAudioSourceNode(context, {}), |
| "options dictionary missing required mediaElement member"); |
| assert_throws_js(TypeError, |
| () => new MediaElementAudioSourceNode(context, {mediaElement: null}), |
| "null mediaElement (HTMLMediaElement is non-nullable)"); |
| assert_throws_js(TypeError, |
| () => new MediaElementAudioSourceNode(context, {mediaElement: undefined}), |
| "undefined mediaElement"); |
| }, "MediaElementAudioSourceNode constructor throws TypeError when MediaElementAudioSourceOptions.mediaElement is missing"); |
| |
| test(t => { |
| const context = new AudioContext(); |
| t.add_cleanup(() => { context.close(); }); |
| const audio1 = new Audio(); |
| const audio2 = new Audio(); |
| |
| const factoryNode = context.createMediaElementSource(audio1); |
| const constructorNode = new MediaElementAudioSourceNode(context, {mediaElement: audio2}); |
| |
| assert_true(factoryNode instanceof MediaElementAudioSourceNode); |
| assert_true(constructorNode instanceof MediaElementAudioSourceNode); |
| assert_equals(factoryNode.mediaElement, audio1); |
| assert_equals(constructorNode.mediaElement, audio2); |
| assert_equals(factoryNode.context, context); |
| assert_equals(constructorNode.context, context); |
| assert_equals(factoryNode.numberOfInputs, constructorNode.numberOfInputs); |
| assert_equals(factoryNode.numberOfOutputs, constructorNode.numberOfOutputs); |
| assert_equals(factoryNode.channelCount, constructorNode.channelCount); |
| assert_equals(factoryNode.channelCountMode, constructorNode.channelCountMode); |
| assert_equals(factoryNode.channelInterpretation, constructorNode.channelInterpretation); |
| }, "createMediaElementSource() and the MediaElementAudioSourceNode constructor produce equivalent nodes"); |
| </script> |
| </body> |
| </html> |
