# | Line 349 | Line 349 | public class CopyOnWriteArraySetTest ext | |
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349 | assertEquals(y, x); | |
350 | } | |
351 | ||
352 | + | /** |
353 | + | * addAll is idempotent |
354 | + | */ |
355 | + | public void testAddAll_idempotent() throws Exception { |
356 | + | Set x = populatedSet(SIZE); |
357 | + | Set y = new CopyOnWriteArraySet(x); |
358 | + | y.addAll(x); |
359 | + | assertEquals(x, y); |
360 | + | assertEquals(y, x); |
361 | + | } |
362 | + | |
363 | } |
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