test_Debugger.Source.prototype.introductionScript.html

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<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=969786

Debugger.Source.prototype.introductionScript and .introductionOffset should

behave when 'eval' is called with no scripted frames active at all.

-->

<head>

  <meta charset="utf-8">

  <title>Debugger.Source.prototype.introductionScript with no caller</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">

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<body>

<pre id="test">

<script>

"use strict";

const {addDebuggerToGlobal} = ChromeUtils.importESModule("resource://gre/modules/jsdebugger.sys.mjs");

addDebuggerToGlobal(globalThis);

window.onload = function() {

  SimpleTest.waitForExplicitFinish();

  let dbg, iframeDO, doc;

  // Create an iframe to debug.

  const iframe = document.createElement("iframe");

  iframe.src = "data:text/html,<div>Hi!</div>";

  iframe.onload = onLoadHandler;

  document.body.appendChild(iframe);

  function onLoadHandler() {

    // Now that the iframe's window has been created, we can add

    // it as a debuggee.

    dbg = new Debugger();

    iframeDO = dbg.addDebuggee(iframe.contentWindow);

    doc = iframe.contentWindow.document;

    const script = doc.createElement("script");

    script.text = "setTimeout(eval.bind(null, 'debugger;'), 0);";

    dbg.onDebuggerStatement = timerHandler;

    doc.body.appendChild(script);

  function timerHandler(frame) {

    // The top stack frame's source should have an undefined

    // introduction script and introduction offset.

    const source = frame.script.source;

    ok(source.introductionScript === undefined,

       "setTimeout eval introductionScript is undefined");

    ok(source.introductionOffset === undefined,

       "setTimeout eval introductionOffset is undefined");

    // Check that the above isn't just some quirk of iframes, or the

    // browser milieu destroying information: an eval script should indeed

    // have proper introduction information.

    const script2 = doc.createElement("script");

    script2.text = "eval('debugger;');";

    iframeDO.makeDebuggeeValue(script2);

    dbg.onDebuggerStatement = evalHandler;

    doc.body.appendChild(script2);

  function evalHandler(frame) {

    // The top stack frame's source should be introduced by the script that

    // called eval.

    const source = frame.script.source;

    const frame2 = frame.older;

    const frame3 = frame2.older;

    ok(source.introductionType === "eval",

       "top frame's source was introduced by 'eval'");

    ok(source.introductionScript === frame2.script,

       "eval frame's introduction script is the older frame's script");

    ok(source.introductionOffset === frame2.offset,

       "eval frame's introduction offset is current offset in older frame");

    // The frame that called eval, in turn, was introduced at the call that

    // inserted the script element into the document.

    ok(frame2.script.source.introductionType === "injectedScript",

       "older frame has no introduction type");

    ok(frame2.script.source.introductionScript === frame3.script,

       "older frame has introduction script");

    ok(frame2.script.source.introductionOffset === frame3.offset,

       "older frame has introduction offset");

    SimpleTest.finish();

};

</script>

</pre>

</body>

</html>