1 files changed, 59 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-iirfilternode-interface/test-iirfilternode.html b/testing/web-platform/tests/webaudio/the-audio-api/the-iirfilternode-interface/test-iirfilternode.html
new file mode 100644
index 000000000..61c11ffc5
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-iirfilternode-interface/test-iirfilternode.html
@@ -0,0 +1,59 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Test the IIRFilterNode Interface</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script>
+test(function(t) {
+  var ac = new AudioContext();
+
+  function check_args(arg1, arg2, err, desc) {
+    test(function() {
+      assert_throws(err, function() {
+        ac.createIIRFilter(arg1, arg2)
+      })
+    }, desc)
+  }
+
+  check_args([], [1.0], 'NotSupportedError',
+             'feedforward coefficients can not be empty');
+
+  check_args([1.0], [], 'NotSupportedError',
+             'feedback coefficients can not be empty');
+
+  var coeff = new Float32Array(21)
+  coeff[0] = 1.0;
+
+  check_args(coeff, [1.0], 'NotSupportedError',
+             'more than 20 feedforward coefficients can not be used');
+
+  check_args([1.0], coeff, 'NotSupportedError',
+             'more than 20 feedback coefficients can not be used');
+
+  check_args([0.0, 0.0], [1.0], 'InvalidStateError',
+             'at least one feedforward coefficient must be non-zero');
+
+  check_args([0.5, 0.5], [0.0], 'InvalidStateError',
+             'the first feedback coefficient must be non-zero');
+
+}, "IIRFilterNode coefficients are checked properly");
+
+test(function(t) {
+  var ac = new AudioContext();
+
+  var frequencies = new Float32Array([-1.0, ac.sampleRate*0.5 - 1.0, ac.sampleRate]);
+  var magResults = new Float32Array(3);
+  var phaseResults = new Float32Array(3);
+
+  var filter = ac.createIIRFilter([0.5, 0.5], [1.0]);
+  filter.getFrequencyResponse(frequencies, magResults, phaseResults);
+
+  assert_true(isNaN(magResults[0]), "Invalid input frequency should give NaN magnitude response");
+  assert_true(!isNaN(magResults[1]), "Valid input frequency should not give NaN magnitude response");
+  assert_true(isNaN(magResults[2]), "Invalid input frequency should give NaN magnitude response");
+  assert_true(isNaN(phaseResults[0]), "Invalid input frequency should give NaN phase response");
+  assert_true(!isNaN(phaseResults[1]), "Valid input frequency should not give NaN phase response");
+  assert_true(isNaN(phaseResults[2]), "Invalid input frequency should give NaN phase response");
+
+}, "IIRFilterNode getFrequencyResponse handles invalid frequencies properly");
+</script>