Convert AudioBufferSource start and loop-comprehensive tests to testharness

third_party/WebKit/LayoutTests/webaudio/resources/audiobuffersource-testing.js

 function createTestBuffer(context, sampleFrameLength) {
     var audioBuffer = context.createBuffer(1, sampleFrameLength, context.sampleRate);

[hongchan, 2017/01/20 18:40:21]

var => let (all instances in here)

[Raymond Toy, 2017/01/20 22:17:27]

Done.

     var channelData = audioBuffer.getChannelData(0);
 
     // Create a simple linear ramp starting at zero, with each value in the buffer equal to its index position.
     for (var i = 0; i < sampleFrameLength; ++i)
         channelData[i] = i;
 
     return audioBuffer;
 }
 
-function checkSingleTest(renderedBuffer, i) {
+function checkSingleTest(renderedBuffer, i, should) {
     var renderedData = renderedBuffer.getChannelData(0);
     var offsetFrame = i * testSpacingFrames;
 
     var test = tests[i];
     var expected = test.expected;
-    var success = true;
     var description;
 
     if (test.description) {
         description = test.description;
     } else {
         // No description given, so create a basic one from the given test parameters.
         description = "loop from " + test.loopStartFrame + " -> " + test.loopEndFrame;
         if (test.offsetFrame)
             description += " with offset " + test.offsetFrame;
         if (test.playbackRate && test.playbackRate != 1)
             description += " with playbackRate of " + test.playbackRate;
     }
 
     var framesToTest;
 
     if (test.renderFrames)
         framesToTest = test.renderFrames;
     else if (test.durationFrames)
         framesToTest = test.durationFrames;
 
     // Verify that the output matches
-    for (var j = 0; j < framesToTest; ++j) {
-        if (expected[j] != renderedData[offsetFrame + j]) {
-            // Copy from Float32Array to regular JavaScript array for error message.
-            var renderedArray = new Array();
-            for (var j = 0; j < test.renderFrames; ++j)
-                renderedArray[j] = renderedData[offsetFrame + j];
-
-            var s = description + ": expected: " + expected + " actual: " + renderedArray;
-            success = false;
-            Should(s, success).beEqualTo(true);
-            break;
-        }
-    }
+    var prefix = "Case " + i + ": ";
+    should(renderedData.slice(offsetFrame, offsetFrame + framesToTest),
+        prefix + description)
+      .beEqualToArray(expected);
 
     // Verify that we get all zeroes after the buffer (or duration) has passed.
-    for (var j = framesToTest; j < testSpacingFrames; ++j) {
-        if (renderedData[offsetFrame + j]) {
-            // Copy from Float32Array to regular JavaScript array for error message.
-            var renderedArray = new Array();
-            for (var j = framesToTest; j < testSpacingFrames; ++j)
-                renderedArray[j - framesToTest] = renderedData[offsetFrame + j];
-
-            var s = description + ": expected: all zeroes actual: " + renderedArray;
-            success = false;
-            Should(s, success).beEqualTo(true);
-            break;
-        }
-    }
-
-    Should("", success)
-        .summarize(description, description);
-
-    return success;
+    should(renderedData.slice(offsetFrame + framesToTest, offsetFrame +
+          testSpacingFrames),
+        prefix + description + ": tail")
+      .beConstantValueOf(0);
 }
 
-function checkAllTests(event) {
-    var renderedBuffer = event.renderedBuffer;
+function checkAllTests(renderedBuffer, should) {
     for (var i = 0; i < tests.length; ++i)
-        checkSingleTest(renderedBuffer, i);
-
-    finishJSTest();
+      checkSingleTest(renderedBuffer, i, should);
 }
 
 
 // Create the actual result by modulating playbackRate or detune AudioParam of
 // ABSN. |modTarget| is a string of AudioParam name, |modOffset| is the offset
 // (anchor) point of modulation, and |modRange| is the range of modulation.
 //
 //   createSawtoothWithModulation(context, 'detune', 440, 1200);
 //
 // The above will perform a modulation on detune within the range of
@@ skipping 23 matching lines @@
   // The oscillator output should be amplified accordingly to drive the
   // modulation within the desired range.
   lfo.connect(amp);
   amp.connect(phasor[modTarget]);
 
   phasor.connect(context.destination);
 
   lfo.start();
   phasor.start();
 }