[observable-takeUntil.any.html]
  [takeUntil subscribes to source Observable and mirrors it uninterrupted]
    expected: FAIL

  [takeUntil subscribes to notifier]
    expected: FAIL

  [takeUntil: notifier next() unsubscribes from notifier & source observable]
    expected: FAIL

  [takeUntil()'s AbortSignal unsubscribes from notifier & source observable]
    expected: FAIL

  [takeUntil: source never subscribed to when notifier synchronously emits a value]
    expected: FAIL

  [takeUntil: source never subscribed to when notifier synchronously emits error]
    expected: FAIL

  [takeUntil: source is uninterrupted when notifier completes, even synchronously]
    expected: FAIL

  [takeUntil() mirrors the source Observable until its first next() value]
    expected: FAIL

  [takeUntil: notifier calls `Subscriber#error()` twice; second goes to global error handler]
    expected: FAIL

  [takeUntil: notifier next() unsubscribes from notifier]
    expected: FAIL

  [takeUntil: notifier error() unsubscribes from notifier]
    expected: FAIL

  [takeUntil: notifier throw Error unsubscribes from notifier]
    expected: FAIL


[observable-takeUntil.any.worker.html]
  [takeUntil subscribes to source Observable and mirrors it uninterrupted]
    expected: FAIL

  [takeUntil subscribes to notifier]
    expected: FAIL

  [takeUntil: notifier next() unsubscribes from notifier & source observable]
    expected: FAIL

  [takeUntil()'s AbortSignal unsubscribes from notifier & source observable]
    expected: FAIL

  [takeUntil: source never subscribed to when notifier synchronously emits a value]
    expected: FAIL

  [takeUntil: source never subscribed to when notifier synchronously emits error]
    expected: FAIL

  [takeUntil: source is uninterrupted when notifier completes, even synchronously]
    expected: FAIL

  [takeUntil() mirrors the source Observable until its first next() value]
    expected: FAIL

  [takeUntil: notifier calls `Subscriber#error()` twice; second goes to global error handler]
    expected: FAIL

  [takeUntil: notifier next() unsubscribes from notifier]
    expected: FAIL

  [takeUntil: notifier error() unsubscribes from notifier]
    expected: FAIL

  [takeUntil: notifier throw Error unsubscribes from notifier]
    expected: FAIL