Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/pixel-manipulation/2d.imageData.create2.initial.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.initial
+// Description:createImageData(sw, sh) returns transparent black data of the right size
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("createImageData(sw, sh) returns transparent black data of the right size");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.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();
+
+});
+done();