Import wpt@3c8896ae408c8fd594979da7c99970029e7856a7

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/drawing-rectangles-to-the-canvas/2d.clearRect.negative.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.negative
+// Description:clearRect of negative sizes works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("clearRect of negative sizes works");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 50, 25);
+ctx.clearRect(100, 0, -50, 25);
+ctx.clearRect(0, 50, 50, -25);
+ctx.clearRect(100, 50, -50, -25);
+_assertPixel(offscreenCanvas, 25,12, 0,0,0,0, "25,12", "0,0,0,0");
+_assertPixel(offscreenCanvas, 75,12, 0,0,0,0, "75,12", "0,0,0,0");
+_assertPixel(offscreenCanvas, 25,37, 0,0,0,0, "25,37", "0,0,0,0");
+_assertPixel(offscreenCanvas, 75,37, 0,0,0,0, "75,37", "0,0,0,0");
+
+t.done();
+
+});
+done();