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

Comparing jsr166/src/test/tck/SystemTest.java (file contents):
Revision 1.5 by dl, Sat Dec 27 19:26:44 2003 UTC vs.
Revision 1.6 by dl, Thu Jan 15 14:51:33 2004 UTC

#	Line 17 | Line 17 | public class SystemTest extends JSR166Te
17		return new TestSuite(SystemTest.class);
18		}
19
20	+	/**
21	+	* Worst case rounding for millisecs; set for 60 cycle millis clock.
22	+	* This value might need to be changed os JVMs with coarser
23	+	*  System.currentTimeMillis clocks.
24	+	*/
25	+	static final long MILLIS_ROUND = 17;
26	+
27		/**
28		* Nanos between readings of millis is no longer than millis (plus
29	<	* one milli to allow for rounding).
29	>	* possible rounding).
30		* This shows only that nano timing not (much) worse than milli.
31		*/
32		public void testNanoTime1() {
#	Line 33 | Line 40 | public class SystemTest extends JSR166Te
40		long m2 = System.currentTimeMillis();
41		long millis = m2 - m1;
42		long nanos = n2 - n1;
36	–
43		assertTrue(nanos >= 0);
44	<	assertTrue(nanos < (millis+1) * 1000000);
44	>	long nanosAsMillis = nanos / 1000000;
45	>	assertTrue(nanosAsMillis <= millis + MILLIS_ROUND);
46		}
47		catch(InterruptedException ie) {
48		unexpectedException();
#	Line 43 | Line 50 | public class SystemTest extends JSR166Te
50		}
51
52		/**
53	<	* Millis between readings of nanos is no longer than nanos
53	>	* Millis between readings of nanos is less than nanos, adjusting
54	>	* for rounding.
55		* This shows only that nano timing not (much) worse than milli.
56		*/
57		public void testNanoTime2() {
#	Line 59 | Line 67 | public class SystemTest extends JSR166Te
67		long nanos = n2 - n1;
68
69		assertTrue(nanos >= 0);
70	<	assertTrue(millis * 1000000 <= nanos);
70	>	long nanosAsMillis = nanos / 1000000;
71	>	assertTrue(millis <= nanosAsMillis + MILLIS_ROUND);
72		}
73		catch(InterruptedException ie) {
74		unexpectedException();

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