browser_webconsole_logging_exceptions.js

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

// Check that logging exceptions works as expected

"use strict";

const TEST_URI =

  `data:text/html;charset=utf8,` +

  encodeURI(`<!DOCTYPE html><script>

  const domExceptionOnLine2 = new DOMException("Bar");

  /* console.error will be on line 4 */

  console.error("Foo", domExceptionOnLine2);

</script>`);

add_task(async function () {

  const hud = await openNewTabAndConsole(TEST_URI);

  info("Wait for the error to be logged");

  const msgNode = await waitFor(() => findConsoleAPIMessage(hud, "Foo"));

  ok(!msgNode.classList.contains("open"), `Error logged not expanded`);

  const framesNode = await waitFor(() => msgNode.querySelector(".pane.frames"));

  ok(framesNode, "The DOMException stack is displayed right away");

  const frameNodes = framesNode.querySelectorAll(".frame");

  is(frameNodes.length, 1, "Expected frames are displayed");

is(

    frameNodes[0].querySelector(".line").textContent,

    "2",

    "The stack displayed by default refers to second argument passed to console.error and refers to DOMException callsite"

);

  info(

    "Check that the console.error stack is refering to console.error() callsite"

);

  await checkMessageStack(hud, "Foo", [4]);

});