| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/2dcontext/resources/canvas-tests.js"></script> |
| <link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas"> |
| <script> |
| |
| test(function() { |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| assert_equals(offscreenCanvas.width, 100); |
| assert_equals(offscreenCanvas.height, 50); |
| |
| offscreenCanvas.width = 50; |
| offscreenCanvas.height = 100; |
| assert_equals(offscreenCanvas.width, 50); |
| assert_equals(offscreenCanvas.height, 100); |
| }, "Test that calling OffscreenCanvas's constructor generates correct width and height."); |
| |
| test(function() { |
| var offscreenCanvas1 = new OffscreenCanvas(1, 1); |
| |
| offscreenCanvas1.width = null; |
| offscreenCanvas1.height = null; |
| assert_equals(offscreenCanvas1.width, 0); |
| assert_equals(offscreenCanvas1.height, 0); |
| |
| assert_throws(new TypeError(), function() { new OffscreenCanvas(-1, -1); }); |
| |
| var offscreenCanvas2 = new OffscreenCanvas(null, null); |
| assert_equals(offscreenCanvas2.width, 0); |
| assert_equals(offscreenCanvas2.height, 0); |
| |
| assert_throws(new TypeError(), function() { offscreenCanvas2.width = -1; }); |
| assert_throws(new TypeError(), function() { offscreenCanvas2.height = -1; }); |
| |
| var obj = {Name: "John Doe", Age: 30}; |
| assert_throws(new TypeError(), function() { offscreenCanvas2.width = obj; }); |
| assert_throws(new TypeError(), function() { offscreenCanvas2.height = obj; }); |
| assert_throws(new TypeError(), function() { new OffscreenCanvas(obj, obj); }); |
| }, "Test that OffscreenCanvas constructor handles invalid arguments correctly"); |
| |
| </script> |
| |
