mozilla-central/devtools/client/webconsole/test/browser/browser_webconsole_lenient_this_warning.js (file symbol)

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Test Info: Warnings

/* Any copyright is dedicated to the Public Domain.
"use strict";
// Check that calling the LenientThis warning is only called when expected.
const TEST_URI = `data:text/html;charset=utf8,<!DOCTYPE html>${encodeURI(`
<h1>LenientThis warning</h1>
<script>
const el = document.createElement('div');
globalThis.htmlDivElementProto = Object.getPrototypeOf(el);
function triggerLenientThisWarning(){
Object.getOwnPropertyDescriptor(
Object.getPrototypeOf(globalThis.htmlDivElementProto),
'onmouseenter'
).get.call()
}
</script>`)}`;
add_task(async function () {
const hud = await openNewTabAndConsole(TEST_URI);
const expectedWarningMessageText =
"Ignoring get or set of property that has [LenientThis] ";
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
const global = content.wrappedJSObject;
global.console.log(global.htmlDivElementProto);
});
info("Wait for a bit so any warning message could be displayed");
await wait(1000);
await waitFor(() => findConsoleAPIMessage(hud, "HTMLDivElementPrototype"));
ok(
!findWarningMessage(hud, expectedWarningMessageText, ".warn"),
"Displaying the HTMLDivElementPrototype does not trigger the LenientThis warning"
);
info(
"Call a LenientThis getter with the wrong `this` to trigger a warning message"
);
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
content.wrappedJSObject.triggerLenientThisWarning();
});
await waitFor(() =>
findWarningMessage(hud, expectedWarningMessageText, ".warn")
);
ok(
true,
"Calling the LenientThis getter with an unexpected `this` did triggered the warning"
);
info(
"Clear the console and call the LenientThis getter with an unexpected `this` again"
);
await clearOutput(hud);
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
content.wrappedJSObject.triggerLenientThisWarning();
});
info("Wait for a bit so any warning message could be displayed");
await wait(1000);
ok(
!findWarningMessage(hud, expectedWarningMessageText, ".warn"),
"Calling the LenientThis getter a second time did not trigger the warning again"
);
});