1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/js/helpers.js b/testing/web-platform/tests/webaudio/js/helpers.js
new file mode 100644
index 000000000..9e4ee6fa3
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/js/helpers.js
@@ -0,0 +1,33 @@
+function assert_array_approx_equals(actual, expected, epsilon, description)
+{
+  assert_true(actual.length === expected.length,
+              (description + ": lengths differ, expected " + expected.length + " got " + actual.length))
+
+  for (var i=0; i < actual.length; i++) {
+    assert_approx_equals(actual[i], expected[i], epsilon, (description + ": element " + i))
+  }
+}
+
+/*
+  Returns an array (typed or not), of the passed array with removed trailing and ending
+  zero-valued elements
+ */
+function trimEmptyElements(array) {
+  var start = 0;
+  var end = array.length;
+  
+  while (start < array.length) {
+    if (array[start] !== 0) {
+      break;
+    }
+    start++;
+  }
+
+  while (end > 0) {
+    end--;
+    if (array[end] !== 0) {
+      break;
+    }
+  }
+  return array.subarray(start, end);
+}