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Diffstat (limited to 'testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.exceptions-are-no-op.html')
-rw-r--r-- | testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.exceptions-are-no-op.html | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.exceptions-are-no-op.html b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.exceptions-are-no-op.html new file mode 100644 index 0000000000..a047c539cf --- /dev/null +++ b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.exceptions-are-no-op.html @@ -0,0 +1,32 @@ +<!DOCTYPE html> +<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> +<title>OffscreenCanvas test: 2d.layer.exceptions-are-no-op</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="/html/canvas/resources/canvas-tests.js"></script> + +<h1>2d.layer.exceptions-are-no-op</h1> +<p class="desc">Checks that the context state is left unchanged if beginLayer throws.</p> + + +<script> +var t = async_test("Checks that the context state is left unchanged if beginLayer throws."); +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'); + + // Get `beginLayer` to throw while parsing the filter. + assert_throws_js(TypeError, + () => ctx.beginLayer({filter: {name: 'colorMatrix', + values: 'foo'}})); + // `beginLayer` shouldn't have opened the layer, so `endLayer` should throw. + assert_throws_dom("InvalidStateError", () => ctx.endLayer()); + t.done(); + +}); +</script> |