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[JENKINS-15156] Add regression test

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tsartarzan committed Feb 3, 2013
1 parent 41fc8a1 commit dbd6b530e7c1a7008dceff4ecc816eda9fc24ef1
Showing with 46 additions and 0 deletions.
  1. +46 −0 test/src/test/java/hudson/model/AbstractProjectTest.java
@@ -47,6 +47,9 @@
import java.io.File;
import java.util.concurrent.Future;
import org.apache.commons.io.FileUtils;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.util.ArrayList;

/**
* @author Kohsuke Kawaguchi
@@ -280,4 +283,47 @@ public void testSymlinkForPostBuildFailure() throws Exception {
assertSymlinkForBuild(lastSuccessful, 1);
assertSymlinkForBuild(lastStable, 1);
}

// Force garbage collection of ref's referent. Taken from NetBeans code.
public static void forceGc(final Reference<?> ref) {
ArrayList<byte[]> alloc = new ArrayList<byte[]>();
int size = 100000;
System.out.print("forcing garbage collection...");
for (int i = 0; i < 50; i++) {
if (ref.get() == null) {
System.out.println("succeeded");
return;
}
try {
System.gc();
System.runFinalization();
} catch (OutOfMemoryError error) {
// OK
}
try {
alloc.add(new byte[size]);
size = (int)(((double)size) * 1.3);
} catch (OutOfMemoryError error) {
size = size / 2;
}
try {
if (i % 3 == 0) {
Thread.sleep(321);
}
} catch (InterruptedException t) {
// ignore
}
}
System.out.println("failed");
}

@Bug(15156)
public void testGetBuildAfterGc() throws Exception {
FreeStyleProject job = createFreeStyleProject();
job.scheduleBuild2(0, new Cause.UserCause()).get();
// If this fails to garbage-collect, the test run will not have any value, but it will
// at least not fail.
forceGc(new WeakReference(job.getLastBuild()));
assertTrue(job.getLastBuild() != null);
}
}

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