Source code
Revision control
Copy as Markdown
Other Tools
// We don't have the test harness in this context, so we roll our own
// which communicates with our initiator which is actually running the tests.
function assert(condition, message) {
if (!condition) {
throw new Error("Assertion failed: " + message);
}
}
// Run a test after activation.
document.addEventListener("prerenderingchange", async (_) => {
// history.length is racy on activation. Wait *100ms* as a workaround.
// See crbug.com/1222893.
await new Promise((resolve) => {
window.setTimeout(resolve, 100);
});
const urlParams = new URLSearchParams(window.location.search);
const testName = urlParams.get("testName");
const uid = urlParams.get("uid");
const testChannel = new PrerenderChannel(
`test-channel-${testName}`, uid
);
try {
const activationTestFn = testName + "Activation";
const testFn = window[activationTestFn];
if (!testFn) {
testChannel.postMessage("Missing test: " + testName);
return;
}
testFn();
testChannel.postMessage("Passed");
} catch (e) {
testChannel.postMessage(
"Failed: " + e.name + ": " + e.message,
);
} finally {
testChannel.close();
}
})
if (document.prerendering) {
window.onload = async () => {
const urlParams = new URLSearchParams(window.location.search);
const testName = urlParams.get("testName");
const uid = urlParams.get("uid");
const prerenderChannel = new PrerenderChannel(
`prerender-channel-${testName}`, uid
);
// The document load event is not finished at this point, so navigations
// would be done with replacement. This interferes with our tests. We wait
// for the next task before navigating to avoid this.
await new Promise((resolve) => {
window.setTimeout(resolve);
});
try {
let testFn = window[testName];
if (!testFn) {
prerenderChannel.postMessage("Missing test: " + testName);
return;
}
await testFn();
prerenderChannel.postMessage("Passed");
} catch (e) {
prerenderChannel.postMessage(
"Failed: " + e.name + ": " + e.message,
);
} finally {
prerenderChannel.close();
}
};
}