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root/jsr166/jsr166/src/test/jtreg/util/HashMap/WhiteBoxResizeTest.java

Comparing jsr166/src/test/jtreg/util/HashMap/WhiteBoxResizeTest.java (file contents):
Revision 1.1 by jsr166, Tue Dec 18 20:21:24 2018 UTC vs.
Revision 1.2 by jsr166, Wed Dec 19 14:48:32 2018 UTC

#	Line 27 | Line 27 | import java.lang.invoke.MethodHandles;
27		import java.lang.invoke.MethodType;
28		import java.lang.invoke.VarHandle;
29		import java.util.HashMap;
30	+	import java.util.LinkedHashMap;
31	+	import java.util.List;
32		import java.util.Map;
33	+	import java.util.concurrent.ThreadLocalRandom;
34	+	import java.util.function.Supplier;
35		import java.util.stream.IntStream;
36
37		import static java.util.stream.Collectors.toMap;
#	Line 42 | Line 46 | import static org.testng.Assert.assertNu
46		* @run testng WhiteBoxResizeTest
47		*/
48		public class WhiteBoxResizeTest {
49	+	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
50		final MethodHandle TABLE_SIZE_FOR;
51		final VarHandle THRESHOLD;
52		final VarHandle TABLE;
#	Line 91 | Line 96 | public class WhiteBoxResizeTest {
96		}
97
98		@Test
99	<	public void capacityTest() {
100	<	HashMap<Integer, Integer> map = new HashMap<>();
99	>	public void capacityTestDefaultConstructor() {
100	>	capacityTestDefaultConstructor(new HashMap<>());
101	>	capacityTestDefaultConstructor(new LinkedHashMap<>());
102	>	}
103	>
104	>	void capacityTestDefaultConstructor(HashMap<Integer, Integer> map) {
105		assertNull(table(map));
106
107		map.put(1, 1);
108	<	assertEquals(capacity(map), 16);
108	>	assertEquals(capacity(map), 16); // default initial capacity
109
110		map.putAll(IntStream.range(0, 64).boxed().collect(toMap(i -> i, i -> i)));
111		assertEquals(capacity(map), 128);
112		}
113	+
114	+	@Test
115	+	public void capacityTestInitialCapacity() {
116	+	int initialCapacity = rnd.nextInt(1, 256);
117	+	List<Supplier<HashMap<Integer, Integer>>> suppliers = List.of(
118	+	() -> new HashMap<>(initialCapacity),
119	+	() -> new HashMap<>(initialCapacity, 0.75f),
120	+	() -> new LinkedHashMap<>(initialCapacity),
121	+	() -> new LinkedHashMap<>(initialCapacity, 0.75f));
122	+
123	+	for (Supplier<HashMap<Integer, Integer>> supplier : suppliers) {
124	+	HashMap<Integer, Integer> map = supplier.get();
125	+	assertNull(table(map));
126	+
127	+	map.put(1, 1);
128	+	assertEquals(capacity(map), tableSizeFor(initialCapacity));
129	+	}
130	+	}
131		}

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