1 files changed, 35 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.html
new file mode 100644
index 0000000000..566a9a30db
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.initial</h1>
+<p class="desc">createImageData(sw, sh) returns transparent black data of the right size</p>
+
+
+<script>
+var t = async_test("createImageData(sw, sh) returns transparent black data of the right size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+    throw reason;
+});
+t.step(function() {
+
+  var canvas = new OffscreenCanvas(100, 50);
+  var ctx = canvas.getContext('2d');
+
+  var imgdata = ctx.createImageData(10, 20);
+  _assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+  _assert(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
+  _assert(imgdata.width > 0, "imgdata.width > 0");
+  var isTransparentBlack = true;
+  for (var i = 0; i < imgdata.data.length; ++i)
+      if (imgdata.data[i] !== 0)
+          isTransparentBlack = false;
+  _assert(isTransparentBlack, "isTransparentBlack");
+  t.done();
+
+});
+</script>