Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

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

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.readonly
+// Description:ImageData objects properties are read-only
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("ImageData objects properties are read-only");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+var w = imgdata.width;
+var h = imgdata.height;
+var d = imgdata.data;
+imgdata.width = 123;
+imgdata.height = 123;
+imgdata.data = [100,100,100,100];
+_assertSame(imgdata.width, w, "imgdata.width", "w");
+_assertSame(imgdata.height, h, "imgdata.height", "h");
+_assertSame(imgdata.data, d, "imgdata.data", "d");
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[1], 0, "imgdata.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata.data[2], 0, "imgdata.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata.data[3], 0, "imgdata.data[\""+(3)+"\"]", "0");
+
+t.done();
+
+});
+done();