tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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test_getCallerLocation.js (2687B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 "use strict";
      5 
      6 Cu.importGlobalProperties(["ChromeUtils"]);
      7 
      8 const {AddonTestUtils} = ChromeUtils.importESModule("resource://testing-common/AddonTestUtils.sys.mjs");
      9 
     10 add_task(async function() {
     11  const sandbox = Cu.Sandbox("http://example.com/");
     12 
     13  function foo() {
     14    return bar();
     15  }
     16 
     17  function bar() {
     18    return baz();
     19  }
     20 
     21  function baz() {
     22    return ChromeUtils.getCallerLocation(Cu.getObjectPrincipal(sandbox));
     23  }
     24 
     25  Cu.evalInSandbox(`
     26    function it() {
     27      // Use map() to throw a self-hosted frame on the stack, which we
     28      // should filter out.
     29      return [0].map(foo)[0];
     30    }
     31    function thing() {
     32      return it();
     33    }
     34  `, sandbox, undefined, "thing.js");
     35 
     36  Cu.exportFunction(foo, sandbox, {defineAs: "foo"});
     37 
     38  let frame = sandbox.thing();
     39 
     40  equal(frame.source, "thing.js", "Frame source");
     41  equal(frame.line, 5, "Frame line");
     42  equal(frame.column, 18, "Frame column");
     43  equal(frame.functionDisplayName, "it", "Frame function name");
     44  equal(frame.parent, null, "Frame parent");
     45 
     46  equal(String(frame), "it@thing.js:5:18\n", "Stringified frame");
     47 
     48 
     49  // reportError
     50 
     51  let {messages} = await AddonTestUtils.promiseConsoleOutput(() => {
     52    Cu.reportError("Meh", frame);
     53  });
     54 
     55  let [msg] = messages.filter(m => m.message.includes("Meh"));
     56 
     57  equal(msg.stack, frame, "reportError stack frame");
     58  equal(msg.message, '[JavaScript Error: "Meh" {file: "thing.js" line: 5}]\nit@thing.js:5:18\n');
     59 
     60  Assert.throws(() => { Cu.reportError("Meh", {}); },
     61                err => err.result == Cr.NS_ERROR_INVALID_ARG,
     62                "reportError should throw when passed a non-SavedFrame object");
     63 
     64 
     65  // createError
     66 
     67  Assert.throws(() => { ChromeUtils.createError("Meh", {}); },
     68                err => err.result == Cr.NS_ERROR_INVALID_ARG,
     69                "createError should throw when passed a non-SavedFrame object");
     70 
     71  let cloned = Cu.cloneInto(frame, sandbox);
     72  let error = ChromeUtils.createError("Meh", cloned);
     73 
     74  equal(String(cloned), String(frame),
     75        "Cloning a SavedStack preserves its stringification");
     76 
     77  equal(Cu.getGlobalForObject(error), sandbox,
     78        "createError creates errors in the global of the SavedFrame");
     79  equal(error.stack, String(cloned),
     80        "createError creates errors with the correct stack");
     81 
     82  equal(error.message, "Meh", "Error message");
     83  equal(error.fileName, "thing.js", "Error filename");
     84  equal(error.lineNumber, 5, "Error line");
     85  equal(error.columnNumber, 18, "Error column");
     86 });