firefox-main/toolkit/components/extensions/test/mochitest/test_ext_runtime_sendMessage_response_warning.html (file symbol)

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Test Info:

<!DOCTYPE HTML>
<html>
<head>
<title>Test sendResponse() is ignored warning from a content script runtime.onMessage listener</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
<script type="text/javascript" src="head.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<script>
"use strict";
function expectedWarning(extension) {
return new RegExp(
RegExp.escape(
"sendResponse() has no effect because the runtime.onMessage handler " +
`has already returned a Promise. (extension: ${extension.id})`
)
);
}
add_task(async function test_content_script_sendResponse_warning() {
let extension = ExtensionTestUtils.loadExtension({
manifest: {
content_scripts: [
{
matches: ["*://mochi.test/*/file_sample.html"],
js: ["content_script.js"],
},
],
},
background() {
browser.runtime.onMessage.addListener(async (msg, sender) => {
browser.test.assertEq("ready", msg, "content script is ready");
let response = await browser.tabs.sendMessage(
sender.tab.id,
"pinging content script"
);
browser.test.assertEq(
undefined,
response,
"sendResponse() from content script listener is ignored when that listener returns a Promise"
);
browser.test.sendMessage("done");
});
},
files: {
"content_script.js"() {
browser.runtime.onMessage.addListener(
async (msg, sender, sendResponse) => {
sendResponse("Hi from content script");
}
);
browser.runtime.sendMessage("ready");
},
},
});
await extension.startup();
consoleMonitor.start([{ message: expectedWarning(extension) }]);
let win = window.open("file_sample.html");
await extension.awaitMessage("done");
win.close();
await extension.unload();
await consoleMonitor.finished();
});
</script>
</body>
</html>