function waitForMessage(bc) {
return new Promise(resolve => {
bc.addEventListener("message", ({ data }) => { resolve(data); }, { once: true });
});
}
async function runTest() {
await SimpleTest.enableLegacyUnpartitionedStorage();
let bc = new BroadcastChannel("bug1850335");
// Load the first page.
let waitForPage1 = waitForMessage(bc);
window.open("file_bug1850335_1.html", "_blank", "noopener");
let { persisted, value: initial } = await waitForPage1;
ok(!persisted, "Loaded first page");
is(initial, "", "Initial value is empty string");
// Set the value of the input element in the first page.
let waitForValue = waitForMessage(bc);
bc.postMessage({ cmd: "setValue", arg: "ok" });
let { value: expected }= await waitForValue;
is(expected, "ok", "Loaded first page");
// Load the second page (same origin with the first page).
let waitForPage2 = waitForMessage(bc);
bc.postMessage({ cmd: "load", arg: "file_bug1850335_2.html" });
({ persisted } = await waitForPage2);
ok(!persisted, "Loaded second page (same-origin)");
// Load the third page (cross origin with the first and second pages). The
// third page will immediately do |history.back()| to go back to the
// second page.
waitForPage2 = waitForMessage(bc);
const crossOrigin = new URL("file_bug1850335_3.html", `https://example.com${location.pathname}`);
bc.postMessage({ cmd: "load", arg: crossOrigin.href });
({ persisted } = await waitForPage2);
ok(!persisted, "Second page should not be in the BFCache");
// Go back to the first page.
waitForPage1 = waitForMessage(bc);
bc.postMessage({ cmd: "back" });
let { persisted: fromBFCache, value: result } = await waitForPage1;
ok(fromBFCache, "Page came from BFCache");
is(result, expected, "Value wasn't cleared");
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