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root/jsr166/jsr166/src/test/tck/ThreadLocalRandomTest.java

Comparing jsr166/src/test/tck/ThreadLocalRandomTest.java (file contents):
Revision 1.21 by jsr166, Sat Apr 25 04:55:31 2015 UTC vs.
Revision 1.24 by jsr166, Sat Dec 10 12:39:15 2016 UTC

#	Line 52 | Line 52 | public class ThreadLocalRandomTest exten
52		}
53
54		/**
55	+	* Repeated calls to next (only accessible via reflection) produce
56	+	* at least two distinct results, and repeated calls produce all
57	+	* possible values.
58	+	*/
59	+	public void testNext() throws ReflectiveOperationException {
60	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
61	+	final java.lang.reflect.Method m;
62	+	try {
63	+	m = ThreadLocalRandom.class.getDeclaredMethod(
64	+	"next", new Class[] { int.class });
65	+	m.setAccessible(true);
66	+	} catch (SecurityException acceptable) {
67	+	// Security manager may deny access
68	+	return;
69	+	} catch (Exception ex) {
70	+	// jdk9 module system may deny access
71	+	if (ex.getClass().getSimpleName()
72	+	.equals("InaccessibleObjectException"))
73	+	return;
74	+	throw ex;
75	+	}
76	+
77	+	int i;
78	+	{
79	+	int val = new java.util.Random().nextInt(4);
80	+	for (i = 0; i < NCALLS; i++) {
81	+	int q = (int) m.invoke(rnd, new Object[] { 2 });
82	+	if (val == q) break;
83	+	}
84	+	assertTrue(i < NCALLS);
85	+	}
86	+
87	+	{
88	+	int r = (int) m.invoke(rnd, new Object[] { 3 });
89	+	for (i = 0; i < NCALLS; i++) {
90	+	int q = (int) m.invoke(rnd, new Object[] { 3 });
91	+	assertTrue(q < (1<<3));
92	+	if (r != q) break;
93	+	}
94	+	assertTrue(i < NCALLS);
95	+	}
96	+	}
97	+
98	+	/**
99		* Repeated calls to nextInt produce at least two distinct results
100		*/
101		public void testNextInt() {

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