test_fpuhandler.html

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<head>

  <title>Floating-point exception handler test</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

<body onload="runTest()">

  <embed id="plugin1" type="application/x-test" width="400" height="400"></embed>

  <script class="testbody" type="application/javascript">

  SimpleTest.waitForExplicitFinish();

  function doDiv(x, y) {

    var z;

    z = x / y;

    for (let i = 0 + x; i < 1000; ++i)

      z = y / x;

    z = x / y;

    return z;

  function runTest() {

    ok(isNaN(doDiv(0.0, 0.0)), "Undefined division-by-zero doesn't crash");

    try {

      document.getElementById("plugin1").enableFPExceptions();

    } catch (e) {

      ok(true, "No special code to set the FPU bit in the testplugin.");

      SimpleTest.finish();

      return;

    ok(isNaN(doDiv(0.0, 0.0)), "Undefined division-by-zero doesn't crash again.");

    SimpleTest.finish();

  </script>