How to compare two Streams in Java 8

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static void assertStreamEquals(Stream<?> s1, Stream<?> s2) {
    Iterator<?> iter1 = s1.iterator(), iter2 = s2.iterator();
    while(iter1.hasNext() && iter2.hasNext())
        assertEquals(iter1.next(), iter2.next());
    assert !iter1.hasNext() && !iter2.hasNext();
}

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