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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.DAYS; |
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import static java.util.concurrent.TimeUnit.HOURS; |
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import static java.util.concurrent.TimeUnit.MICROSECONDS; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.MINUTES; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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|
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.TimeUnit; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class TimeUnitTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(TimeUnitTest.class); |
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} |
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|
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void testConversion(TimeUnit x, TimeUnit y, long n, long expected) { |
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assertEquals(expected, x.convert(n, y)); |
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switch (x) { |
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case NANOSECONDS: assertEquals(expected, y.toNanos(n)); break; |
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case MICROSECONDS: assertEquals(expected, y.toMicros(n)); break; |
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case MILLISECONDS: assertEquals(expected, y.toMillis(n)); break; |
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case SECONDS: assertEquals(expected, y.toSeconds(n)); break; |
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case MINUTES: assertEquals(expected, y.toMinutes(n)); break; |
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case HOURS: assertEquals(expected, y.toHours(n)); break; |
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case DAYS: assertEquals(expected, y.toDays(n)); break; |
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default: throw new AssertionError(); |
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} |
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|
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if (n > 0) testConversion(x, y, -n, -expected); |
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} |
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|
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void testConversion(TimeUnit x, TimeUnit y) { |
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long ratio = x.toNanos(1)/y.toNanos(1); |
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assertTrue(ratio > 0); |
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long[] ns = { 0, 1, 2, Long.MAX_VALUE/ratio, Long.MIN_VALUE/ratio }; |
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for (long n : ns) { |
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testConversion(y, x, n, n * ratio); |
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long[] ks = { n * ratio, n * ratio + 1, n * ratio - 1 }; |
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for (long k : ks) { |
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testConversion(x, y, k, k / ratio); |
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} |
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} |
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} |
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|
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/** |
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* Conversion methods correctly convert sample values |
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*/ |
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public void testConversions() { |
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// Sanity check |
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assertEquals(1, NANOSECONDS.toNanos(1)); |
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assertEquals(1000L * NANOSECONDS.toNanos(1), MICROSECONDS.toNanos(1)); |
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assertEquals(1000L * MICROSECONDS.toNanos(1), MILLISECONDS.toNanos(1)); |
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assertEquals(1000L * MILLISECONDS.toNanos(1), SECONDS.toNanos(1)); |
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assertEquals(60L * SECONDS.toNanos(1), MINUTES.toNanos(1)); |
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assertEquals(60L * MINUTES.toNanos(1), HOURS.toNanos(1)); |
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assertEquals(24L * HOURS.toNanos(1), DAYS.toNanos(1)); |
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|
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for (TimeUnit x : TimeUnit.values()) { |
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assertEquals(x.toNanos(1), NANOSECONDS.convert(1, x)); |
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} |
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|
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for (TimeUnit x : TimeUnit.values()) |
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for (TimeUnit y : TimeUnit.values()) |
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if (x.toNanos(1) >= y.toNanos(1)) |
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testConversion(x, y); |
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} |
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|
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/** |
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* convert saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testConvertSaturate() { |
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assertEquals(Long.MAX_VALUE, |
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NANOSECONDS.convert(Long.MAX_VALUE / 2, SECONDS)); |
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assertEquals(Long.MIN_VALUE, |
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, SECONDS)); |
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assertEquals(Long.MAX_VALUE, |
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NANOSECONDS.convert(Long.MAX_VALUE / 2, MINUTES)); |
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assertEquals(Long.MIN_VALUE, |
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, MINUTES)); |
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assertEquals(Long.MAX_VALUE, |
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NANOSECONDS.convert(Long.MAX_VALUE / 2, HOURS)); |
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assertEquals(Long.MIN_VALUE, |
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, HOURS)); |
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assertEquals(Long.MAX_VALUE, |
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NANOSECONDS.convert(Long.MAX_VALUE / 2, DAYS)); |
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assertEquals(Long.MIN_VALUE, |
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NANOSECONDS.convert(-Long.MAX_VALUE / 4, DAYS)); |
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|
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for (TimeUnit x : TimeUnit.values()) |
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for (TimeUnit y : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / y.toNanos(1); |
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if (ratio >= 1) { |
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assertEquals(ratio, y.convert(1, x)); |
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assertEquals(1, x.convert(ratio, y)); |
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long max = Long.MAX_VALUE/ratio; |
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assertEquals(max * ratio, y.convert(max, x)); |
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assertEquals(-max * ratio, y.convert(-max, x)); |
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assertEquals(max, x.convert(max * ratio, y)); |
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assertEquals(-max, x.convert(-max * ratio, y)); |
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if (max < Long.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, y.convert(max + 1, x)); |
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assertEquals(Long.MIN_VALUE, y.convert(-max - 1, x)); |
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assertEquals(Long.MIN_VALUE, y.convert(Long.MIN_VALUE + 1, x)); |
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} |
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assertEquals(Long.MAX_VALUE, y.convert(Long.MAX_VALUE, x)); |
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assertEquals(Long.MIN_VALUE, y.convert(Long.MIN_VALUE, x)); |
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} |
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} |
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} |
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|
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/** |
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* toNanos saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testToNanosSaturate() { |
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assertEquals(Long.MAX_VALUE, |
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MILLISECONDS.toNanos(Long.MAX_VALUE / 2)); |
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assertEquals(Long.MIN_VALUE, |
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MILLISECONDS.toNanos(-Long.MAX_VALUE / 3)); |
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|
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for (TimeUnit x : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / NANOSECONDS.toNanos(1); |
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if (ratio >= 1) { |
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long max = Long.MAX_VALUE/ratio; |
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for (long z : new long[] {0, 1, -1, max, -max}) |
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assertEquals(z * ratio, x.toNanos(z)); |
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if (max < Long.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toNanos(max + 1)); |
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assertEquals(Long.MIN_VALUE, x.toNanos(-max - 1)); |
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assertEquals(Long.MIN_VALUE, x.toNanos(Long.MIN_VALUE + 1)); |
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} |
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assertEquals(Long.MAX_VALUE, x.toNanos(Long.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toNanos(Long.MIN_VALUE)); |
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if (max < Integer.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toNanos(Integer.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toNanos(Integer.MIN_VALUE)); |
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} |
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} |
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} |
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} |
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|
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/** |
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* toMicros saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testToMicrosSaturate() { |
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for (TimeUnit x : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / MICROSECONDS.toNanos(1); |
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if (ratio >= 1) { |
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long max = Long.MAX_VALUE/ratio; |
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for (long z : new long[] {0, 1, -1, max, -max}) |
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assertEquals(z * ratio, x.toMicros(z)); |
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if (max < Long.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toMicros(max + 1)); |
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assertEquals(Long.MIN_VALUE, x.toMicros(-max - 1)); |
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assertEquals(Long.MIN_VALUE, x.toMicros(Long.MIN_VALUE + 1)); |
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} |
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assertEquals(Long.MAX_VALUE, x.toMicros(Long.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toMicros(Long.MIN_VALUE)); |
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if (max < Integer.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toMicros(Integer.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toMicros(Integer.MIN_VALUE)); |
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} |
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} |
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} |
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} |
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|
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/** |
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* toMillis saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testToMillisSaturate() { |
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for (TimeUnit x : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / MILLISECONDS.toNanos(1); |
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if (ratio >= 1) { |
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long max = Long.MAX_VALUE/ratio; |
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for (long z : new long[] {0, 1, -1, max, -max}) |
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assertEquals(z * ratio, x.toMillis(z)); |
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if (max < Long.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toMillis(max + 1)); |
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assertEquals(Long.MIN_VALUE, x.toMillis(-max - 1)); |
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assertEquals(Long.MIN_VALUE, x.toMillis(Long.MIN_VALUE + 1)); |
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} |
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assertEquals(Long.MAX_VALUE, x.toMillis(Long.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toMillis(Long.MIN_VALUE)); |
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if (max < Integer.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toMillis(Integer.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toMillis(Integer.MIN_VALUE)); |
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} |
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} |
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} |
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} |
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|
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/** |
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* toSeconds saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testToSecondsSaturate() { |
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for (TimeUnit x : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / SECONDS.toNanos(1); |
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if (ratio >= 1) { |
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long max = Long.MAX_VALUE/ratio; |
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for (long z : new long[] {0, 1, -1, max, -max}) |
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assertEquals(z * ratio, x.toSeconds(z)); |
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if (max < Long.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toSeconds(max + 1)); |
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assertEquals(Long.MIN_VALUE, x.toSeconds(-max - 1)); |
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assertEquals(Long.MIN_VALUE, x.toSeconds(Long.MIN_VALUE + 1)); |
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} |
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assertEquals(Long.MAX_VALUE, x.toSeconds(Long.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toSeconds(Long.MIN_VALUE)); |
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if (max < Integer.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toSeconds(Integer.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toSeconds(Integer.MIN_VALUE)); |
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} |
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} |
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} |
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} |
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|
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/** |
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* toMinutes saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testToMinutesSaturate() { |
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for (TimeUnit x : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / MINUTES.toNanos(1); |
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if (ratio > 1) { |
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long max = Long.MAX_VALUE/ratio; |
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for (long z : new long[] {0, 1, -1, max, -max}) |
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assertEquals(z * ratio, x.toMinutes(z)); |
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assertEquals(Long.MAX_VALUE, x.toMinutes(max + 1)); |
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assertEquals(Long.MIN_VALUE, x.toMinutes(-max - 1)); |
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assertEquals(Long.MAX_VALUE, x.toMinutes(Long.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toMinutes(Long.MIN_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toMinutes(Long.MIN_VALUE + 1)); |
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} |
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} |
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} |
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|
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/** |
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* toHours saturates positive too-large values to Long.MAX_VALUE |
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* and negative to LONG.MIN_VALUE |
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*/ |
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public void testToHoursSaturate() { |
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for (TimeUnit x : TimeUnit.values()) { |
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long ratio = x.toNanos(1) / HOURS.toNanos(1); |
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if (ratio >= 1) { |
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long max = Long.MAX_VALUE/ratio; |
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for (long z : new long[] {0, 1, -1, max, -max}) |
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assertEquals(z * ratio, x.toHours(z)); |
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if (max < Long.MAX_VALUE) { |
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assertEquals(Long.MAX_VALUE, x.toHours(max + 1)); |
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assertEquals(Long.MIN_VALUE, x.toHours(-max - 1)); |
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assertEquals(Long.MIN_VALUE, x.toHours(Long.MIN_VALUE + 1)); |
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} |
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assertEquals(Long.MAX_VALUE, x.toHours(Long.MAX_VALUE)); |
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assertEquals(Long.MIN_VALUE, x.toHours(Long.MIN_VALUE)); |
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} |
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} |
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} |
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|
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/** |
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* toString returns name of unit |
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*/ |
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public void testToString() { |
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assertEquals("NANOSECONDS", NANOSECONDS.toString()); |
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assertEquals("MICROSECONDS", MICROSECONDS.toString()); |
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assertEquals("MILLISECONDS", MILLISECONDS.toString()); |
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assertEquals("SECONDS", SECONDS.toString()); |
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assertEquals("MINUTES", MINUTES.toString()); |
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assertEquals("HOURS", HOURS.toString()); |
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assertEquals("DAYS", DAYS.toString()); |
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} |
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|
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/** |
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* name returns name of unit |
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*/ |
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public void testName() { |
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for (TimeUnit x : TimeUnit.values()) |
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assertEquals(x.toString(), x.name()); |
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} |
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|
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/** |
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* Timed wait without holding lock throws |
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* IllegalMonitorStateException |
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*/ |
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public void testTimedWait_IllegalMonitorException() { |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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Object o = new Object(); |
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try { |
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MILLISECONDS.timedWait(o, LONGER_DELAY_MS); |
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threadShouldThrow(); |
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} catch (IllegalMonitorStateException success) {} |
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}}); |
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|
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awaitTermination(t); |
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} |
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|
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/** |
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* timedWait throws InterruptedException when interrupted |
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*/ |
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public void testTimedWait_Interruptible() { |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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Object o = new Object(); |
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|
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Thread.currentThread().interrupt(); |
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try { |
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synchronized (o) { |
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MILLISECONDS.timedWait(o, LONGER_DELAY_MS); |
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} |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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pleaseInterrupt.countDown(); |
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try { |
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synchronized (o) { |
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MILLISECONDS.timedWait(o, LONGER_DELAY_MS); |
| 339 |
} |
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shouldThrow(); |
| 341 |
} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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}}); |
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|
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await(pleaseInterrupt); |
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
| 347 |
t.interrupt(); |
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awaitTermination(t); |
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} |
| 350 |
|
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/** |
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* timedJoin throws InterruptedException when interrupted |
| 353 |
*/ |
| 354 |
public void testTimedJoin_Interruptible() { |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
| 356 |
final Thread s = newStartedThread(new CheckedInterruptedRunnable() { |
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public void realRun() throws InterruptedException { |
| 358 |
Thread.sleep(LONGER_DELAY_MS); |
| 359 |
}}); |
| 360 |
final Thread t = newStartedThread(new CheckedRunnable() { |
| 361 |
public void realRun() throws InterruptedException { |
| 362 |
Thread.currentThread().interrupt(); |
| 363 |
try { |
| 364 |
MILLISECONDS.timedJoin(s, LONGER_DELAY_MS); |
| 365 |
shouldThrow(); |
| 366 |
} catch (InterruptedException success) {} |
| 367 |
assertFalse(Thread.interrupted()); |
| 368 |
|
| 369 |
pleaseInterrupt.countDown(); |
| 370 |
try { |
| 371 |
MILLISECONDS.timedJoin(s, LONGER_DELAY_MS); |
| 372 |
shouldThrow(); |
| 373 |
} catch (InterruptedException success) {} |
| 374 |
assertFalse(Thread.interrupted()); |
| 375 |
}}); |
| 376 |
|
| 377 |
await(pleaseInterrupt); |
| 378 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
| 379 |
t.interrupt(); |
| 380 |
awaitTermination(t); |
| 381 |
s.interrupt(); |
| 382 |
awaitTermination(s); |
| 383 |
} |
| 384 |
|
| 385 |
/** |
| 386 |
* timeUnit.sleep throws InterruptedException when interrupted |
| 387 |
*/ |
| 388 |
public void testTimedSleep_Interruptible() { |
| 389 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
| 390 |
Thread t = newStartedThread(new CheckedRunnable() { |
| 391 |
public void realRun() throws InterruptedException { |
| 392 |
Thread.currentThread().interrupt(); |
| 393 |
try { |
| 394 |
MILLISECONDS.sleep(LONGER_DELAY_MS); |
| 395 |
shouldThrow(); |
| 396 |
} catch (InterruptedException success) {} |
| 397 |
assertFalse(Thread.interrupted()); |
| 398 |
|
| 399 |
pleaseInterrupt.countDown(); |
| 400 |
try { |
| 401 |
MILLISECONDS.sleep(LONGER_DELAY_MS); |
| 402 |
shouldThrow(); |
| 403 |
} catch (InterruptedException success) {} |
| 404 |
assertFalse(Thread.interrupted()); |
| 405 |
}}); |
| 406 |
|
| 407 |
await(pleaseInterrupt); |
| 408 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
| 409 |
t.interrupt(); |
| 410 |
awaitTermination(t); |
| 411 |
} |
| 412 |
|
| 413 |
/** |
| 414 |
* timeUnit.sleep(x) for x <= 0 does not sleep at all. |
| 415 |
*/ |
| 416 |
public void testTimedSleep_nonPositive() throws InterruptedException { |
| 417 |
boolean interrupt = randomBoolean(); |
| 418 |
if (interrupt) Thread.currentThread().interrupt(); |
| 419 |
randomTimeUnit().sleep(0L); |
| 420 |
randomTimeUnit().sleep(-1L); |
| 421 |
randomTimeUnit().sleep(Long.MIN_VALUE); |
| 422 |
if (interrupt) assertTrue(Thread.interrupted()); |
| 423 |
} |
| 424 |
|
| 425 |
/** |
| 426 |
* a deserialized/reserialized unit is the same instance |
| 427 |
*/ |
| 428 |
public void testSerialization() throws Exception { |
| 429 |
for (TimeUnit x : TimeUnit.values()) |
| 430 |
assertSame(x, serialClone(x)); |
| 431 |
} |
| 432 |
|
| 433 |
} |
