Convert DelayNode tests to testharness

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

 var sampleRate = 44100.0;
 
 var renderLengthSeconds = 4;
 var delayTimeSeconds = 0.5;
 var toneLengthSeconds = 2;
 
 function createToneBuffer(context, frequency, numberOfCycles, sampleRate) {
     var duration = numberOfCycles / frequency;
     var sampleFrameLength = duration * sampleRate;
     
     var audioBuffer = context.createBuffer(1, sampleFrameLength, sampleRate);
 
     var n = audioBuffer.length;
     var data = audioBuffer.getChannelData(0);
 
     for (var i = 0; i < n; ++i)
         data[i] = Math.sin(frequency * 2.0*Math.PI * i / sampleRate);
 
     return audioBuffer;
 }
 
-function checkDelayedResult(toneBuffer) {
-    return function(event) {
-        var renderedBuffer = event.renderedBuffer;
+function checkDelayedResult(renderedBuffer, toneBuffer, should) {
+    var sourceData = toneBuffer.getChannelData(0);
+    var renderedData = renderedBuffer.getChannelData(0);
 
-        var sourceData = toneBuffer.getChannelData(0);
-        var renderedData = renderedBuffer.getChannelData(0);
-    
-        var delayTimeFrames = delayTimeSeconds * sampleRate;
-        var toneLengthFrames = toneLengthSeconds * sampleRate;
+    var delayTimeFrames = delayTimeSeconds * sampleRate;
+    var toneLengthFrames = toneLengthSeconds * sampleRate;
 
-        var success = true;
-    
-        var n = renderedBuffer.length;
-    
-        for (var i = 0; i < n; ++i) {
-            if (i < delayTimeFrames) {
-                // Check that initial portion is 0 (since signal is delayed).
-                if (renderedData[i] != 0) {
-                    testFailed("Initial portion is not 0 at frame " + i);
-                    success = false;
-                    break;
-                }
-            } else if (i >= delayTimeFrames && i < delayTimeFrames + toneLengthFrames) {
-                // Make sure that the tone data is delayed by exactly the expected number of frames.
-                var j = i - delayTimeFrames;
-                if (renderedData[i] != sourceData[j]) {
-                    testFailed("Actual data does not match expected data at frame " + i);
-                    success = false;
-                    break;
-                }
-            } else {
-                // Make sure we have silence after the delayed tone.
-                if (renderedData[i] != 0) {
-                    testFailed("Final portion is not 0 at frame " + i);
-                    success = false;
-                    break;
-                }
-            }    
+    var success = true;
+
+    var n = renderedBuffer.length;
+
+    for (var i = 0; i < n; ++i) {
+        if (i < delayTimeFrames) {
+            // Check that initial portion is 0 (since signal is delayed).
+            if (renderedData[i] != 0) {
+                should(renderedData[i],
+                       "Initial portion expected to be 0 at frame " + i)
+                    .beEqualTo(0);
+                success = false;
+                break;
+            }
+        } else if (i >= delayTimeFrames && i < delayTimeFrames +
+            toneLengthFrames) {
+            // Make sure that the tone data is delayed by exactly the expected number of frames.
+            var j = i - delayTimeFrames;
+            if (renderedData[i] != sourceData[j]) {
+                should(renderedData[i],
+                     "Actual data at frame " + i)
+                  .beEqualTo(sourceData[j]);
+                success = false;
+                break;
+            }
+        } else {
+            // Make sure we have silence after the delayed tone.
+            if (renderedData[i] != 0) {
+                should(renderedData[j],
+                     "Final portion at frame " + i)
+                  .beEqualTo(0);
+                success = false;
+                break;
+            }
         }
+    }
 
-        if (success) {
-            testPassed("Test signal was correctly delayed by " + delayTimeSeconds + " sec.");
-        } else {
-            testFailed("Test signal was not correctly delayed by " + delayTimeSeconds + " sec.");
-        }
-
-        finishJSTest();
-    }
+    should(success, "Delaying test signal by " + delayTimeSeconds + " sec was done")
+        .message("correctly", "incorrectly")
 }