toBlob-cross-realm-callback-report-exception.html (1165B)
1 <!doctype html> 2 <meta charset=utf-8> 3 <title>toBlob() reports the exception from its callback in the callback's global object</title> 4 <script src=/resources/testharness.js></script> 5 <script src=/resources/testharnessreport.js></script> 6 <iframe srcdoc="<canvas></canvas>"></iframe> 7 <iframe></iframe> 8 <iframe></iframe> 9 <script> 10 setup({ allow_uncaught_exception: true }); 11 12 const onerrorCalls = []; 13 window.onerror = () => { onerrorCalls.push("top"); }; 14 frames[0].onerror = () => { onerrorCalls.push("frame0"); }; 15 frames[1].onerror = () => { onerrorCalls.push("frame1"); }; 16 frames[2].onerror = () => { onerrorCalls.push("frame2"); }; 17 18 async_test(t => { 19 window.onload = t.step_func(() => { 20 const canvas = frames[0].document.querySelector("canvas"); 21 canvas.toBlob(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`)); 22 23 // Wait until at least one `onerror` fires. 24 t.step_wait_func(() => onerrorCalls.length != 0); 25 26 // Wait for 25ms more in case one other `onerror` fires. This is inherently 27 // flaky... 28 t.step_timeout(() => { 29 assert_array_equals(onerrorCalls, ["frame1"]); 30 t.done(); 31 }, 25); 32 }); 33 }); 34 </script>