<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=742191 --> <head> <meta charset="utf-8"> <title>Test for invalid argument object</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=742191">Mozilla Bug 742191</a> <p id="display"></p> <pre id="test"> <script type="application/javascript"> /** Test for Bug 742191 **/ function doTest() { var gotTypeError = false; var ctx = document.createElement("canvas").getContext("2d"); try { ctx.drawImage({}, 0, 0); } catch(e) { if (e instanceof TypeError) { gotTypeError = true; } } ok(gotTypeError, "passing an invalid argument should cause a type error!"); } doTest(); </script> </pre> </body> </html>