/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at . */
// Tests the Javascript Tracing feature via the Web Console :trace command.
"use strict";
const TEST_URI = `data:text/html;charset=utf-8,
Testing trace command
`;
add_task(async function () {
await pushPref("devtools.debugger.features.javascript-tracing", true);
const hud = await openNewTabAndConsole(TEST_URI);
ok(hud, "web console opened");
info("Test unsupported param error message");
let msg = await evaluateExpressionInConsole(
hud,
":trace --unsupported-param",
"console-api"
);
is(
msg.textContent.trim(),
":trace command doesn't support 'unsupported-param' argument."
);
info("Test the help argument");
msg = await evaluateExpressionInConsole(hud, ":trace --help", "console-api");
ok(msg.textContent.includes("Toggles the JavaScript tracer"));
info("Test toggling the tracer ON");
// Pass `console-api` specific classname as the command results aren't logged as "result".
// Instead the frontend log a message as a console API message.
msg = await evaluateExpressionInConsole(
hud,
":trace --logMethod console --prefix foo --values --on-next-interaction",
"console-api"
);
is(msg.textContent.trim(), "Started tracing to Web Console");
info("Trigger some code before the user interaction");
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
content.wrappedJSObject.someNoise();
});
info("Simulate a user interaction by trigerring a key event on the page");
await BrowserTestUtils.synthesizeKey("a", {}, gBrowser.selectedBrowser);
info("Trigger some code to log some traces");
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
content.wrappedJSObject.main("arg", 2);
});
// Assert that we also see the custom prefix, as well as function arguments
await waitFor(
() => !!findTracerMessages(hud, `foo: interpreter⟶λ main("arg", 2)`).length
);
is(
findTracerMessages(hud, `someNoise`).length,
0,
"The code running before the key press should not be traced"
);
// But now that the tracer is active, we will be able to log this call to someNoise
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
content.wrappedJSObject.someNoise();
});
await waitFor(
() => !!findTracerMessages(hud, `foo: interpreter⟶λ someNoise()`).length
);
info("Test toggling the tracer OFF");
msg = await evaluateExpressionInConsole(hud, ":trace", "console-api");
is(msg.textContent.trim(), "Stopped tracing");
info("Clear past traces");
hud.ui.clearOutput();
await waitFor(
() => !findTracerMessages(hud, `foo: interpreter⟶λ main("arg", 2)`).length
);
ok("Console was cleared");
info("Trigger some code again");
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
content.wrappedJSObject.main();
});
// Let some time for traces to appear
await wait(1000);
ok(
!findTracerMessages(hud, `foo: interpreter⟶λ main("arg", 2)`).length,
"We really stopped recording traces, and no trace appear in the console"
);
});