<!DOCTYPE html>
<head>
  <meta charset=utf-8>
  <title>Test the error message when parsing import maps failed</title>
</head>
<body onload='testLoaded()'>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

<script>
let gotMsg = false;
window.onerror = function(event, src, lineno, colno, error) {
  info("error: " + error.message);
  ok(error instanceof SyntaxError, "error should be SyntaxError.");
  ok(error.message.match(/import map/),
     "error.message should contain 'import map'");
  gotMsg = true;
};
</script>

<!--
An import map with invalid JSON format. A SyntaxError will be thrown when parsing
the import map.
 -->
<script type="importmap" onerror='importMapError()'>
{
  "imports": {{
    "foo": "./foo.js"
  }
}
</script>

<script>
  SimpleTest.waitForExplicitFinish();

  function testLoaded() {
    ok(gotMsg, "Should have thrown a SyntaxError.");
    SimpleTest.finish();
  }
</script>
</body>
