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Fix sporadic assertion failure in SingleThreadEventLoopTest

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Motivation:

SingleThreadEventLoopTest.testScheduleTaskAtFixedRate() fails often due to:

- too little tolerance
- incorrect assertion (it compares only with the previous timestamp)

Modifications:

- Increase the timestamp difference tolerance from 10ms to 20ms
- Improve the timestamp assertion so that the comparison is performed against the first recorded timestamp
- Misc: Fix broken Javadoc tag

Result:

More build stability
This commit is contained in:
Trustin Lee 2015-06-01 14:44:49 +09:00
parent c7b164b409
commit 5f59591a72
1 changed files with 18 additions and 11 deletions
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29
transport/src/test/java/io/netty/channel/SingleThreadEventLoopTest.java
View File

@ -39,7 +39,7 @@ import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
public class SingleThreadEventLoopTest {
@ -146,7 +146,8 @@ public class SingleThreadEventLoopTest {
endTime.set(System.nanoTime());
}
}, 500, TimeUnit.MILLISECONDS).get();
assertTrue(endTime.get() - startTime >= TimeUnit.MILLISECONDS.toNanos(500));
assertThat(endTime.get() - startTime,
is(greaterThanOrEqualTo(TimeUnit.MILLISECONDS.toNanos(500))));
}
@Test
@ -177,15 +178,19 @@ public class SingleThreadEventLoopTest {
assertEquals(5, timestamps.size());
// Check if the task was run without a lag.
Long previousTimestamp = null;
Long firstTimestamp = null;
int cnt = 0;
for (Long t: timestamps) {
if (previousTimestamp == null) {
previousTimestamp = t;
if (firstTimestamp == null) {
firstTimestamp = t;
continue;
}
assertTrue(t.longValue() - previousTimestamp.longValue() >= TimeUnit.MILLISECONDS.toNanos(90));
previousTimestamp = t;
long timepoint = t - firstTimestamp;
assertThat(timepoint, is(greaterThanOrEqualTo(TimeUnit.MILLISECONDS.toNanos(100 * cnt + 80))));
assertThat(timepoint, is(lessThan(TimeUnit.MILLISECONDS.toNanos(100 * (cnt + 1) + 20))));
cnt ++;
}
}
@ -230,9 +235,9 @@ public class SingleThreadEventLoopTest {
long diff = t.longValue() - previousTimestamp.longValue();
if (i == 0) {
assertTrue(diff >= TimeUnit.MILLISECONDS.toNanos(400));
assertThat(diff, is(greaterThanOrEqualTo(TimeUnit.MILLISECONDS.toNanos(400))));
} else {
assertTrue(diff <= TimeUnit.MILLISECONDS.toNanos(10));
assertThat(diff, is(lessThanOrEqualTo(TimeUnit.MILLISECONDS.toNanos(10))));
}
previousTimestamp = t;
i ++;
@ -274,7 +279,8 @@ public class SingleThreadEventLoopTest {
continue;
}
assertTrue(t.longValue() - previousTimestamp.longValue() >= TimeUnit.MILLISECONDS.toNanos(150));
assertThat(t.longValue() - previousTimestamp.longValue(),
is(greaterThanOrEqualTo(TimeUnit.MILLISECONDS.toNanos(150))));
previousTimestamp = t;
}
}
@ -408,7 +414,8 @@ public class SingleThreadEventLoopTest {
loopA.awaitTermination(Integer.MAX_VALUE, TimeUnit.SECONDS);
}
assertTrue(System.nanoTime() - startTime >= TimeUnit.SECONDS.toNanos(1));
assertThat(System.nanoTime() - startTime,
is(greaterThanOrEqualTo(TimeUnit.SECONDS.toNanos(1))));
}
@Test(timeout = 5000)