61 lines
2.2 KiB
JavaScript
61 lines
2.2 KiB
JavaScript
async function loadIframeAndReturnContentWindow() {
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// Create and attach an iframe.
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const iframe = document.createElement('iframe');
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const iframeLoadPromise = new Promise((resolve, reject) => {
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iframe.onload = resolve;
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iframe.onerror = reject;
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});
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document.body.append(iframe);
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await iframeLoadPromise;
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return iframe.contentWindow;
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}
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// This is a regression test to ensure there is no crash inside `takeUntil()`
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// once `notifier` detaches its document, before `source` is subscribed to.
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promise_test(async () => {
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// Hang this off of the main document's global, so the child can easily reach
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// it.
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window.results = [];
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const contentWin = await loadIframeAndReturnContentWindow();
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contentWin.eval(`
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const parentResults = parent.results;
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const source = new Observable(() => parentResults.push('source subscribed'));
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const notifier = new Observable(() => {
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parentResults.push('notifier subscribed');
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// Detach this child document.
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window.frameElement.remove();
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parentResults.push('notifier has detached document');
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});
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source.takeUntil(notifier).subscribe();
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`);
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assert_array_equals(results, ["notifier subscribed", "notifier has detached document"]);
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}, "takeUntil(): notifier Observable detaches document before source " +
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"Observable would be subscribed to");
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promise_test(async () => {
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window.results = [];
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const contentWin = await loadIframeAndReturnContentWindow();
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contentWin.eval(`
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let completeSubscriber, errorSubscriber, notifierSubscriber;
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const sourceComplete = new Observable(subscriber => completeSubscriber = subscriber);
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const sourceError = new Observable(subscriber => errorSubscriber = subscriber);
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const notifier = new Observable(subscriber => notifierSubscriber = subscriber);
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sourceComplete.takeUntil(notifier).subscribe();
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sourceError.takeUntil(notifier).subscribe();
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// Detach this child document.
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window.frameElement.remove();
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completeSubscriber.complete();
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errorSubscriber.error('error');
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notifierSubscriber.error('error');
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`);
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}, "takeUntil(): Source and notifier internal observers do not crash in a " +
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"detached document");
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