fix: Flakiness in ServerScopeTest#runScope

Author: olivergondza

plugin/src/test/java/jenkins/plugins/openstack/compute/JCloudsCleanupThreadTest.java

@@ -41,9 +41,7 @@
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.when;
 
 /**
@@ -240,7 +238,7 @@ public void doNotTerminateNodeThatIsBeingProvisioned() throws Exception {
         assertThat(j.jenkins.getNodes(), Matchers.iterableWithSize(1));
     }
 
-    private static class BuildBlocker extends TestBuilder {
+    public static class BuildBlocker extends TestBuilder {
         private final OneShotEvent enter = new OneShotEvent();
         private final OneShotEvent exit = new OneShotEvent();
 
@@ -250,5 +248,13 @@ public boolean perform(AbstractBuild<?, ?> build, Launcher launcher, BuildListen
             exit.block();
             return true;
         }
+
+        public void awaitStarted() throws InterruptedException {
+            enter.block();
+        }
+
+        public void signalDone() {
+            exit.signal();
+        }
     }
 }

plugin/src/test/java/jenkins/plugins/openstack/compute/ServerScopeTest.java

@@ -9,7 +9,6 @@
 import jenkins.util.Timer;
 import org.junit.Rule;
 import org.junit.Test;
-import org.jvnet.hudson.test.SleepBuilder;
 import org.jvnet.hudson.test.WithoutJenkins;
 import org.openstack4j.model.compute.Server;
 
@@ -113,20 +112,31 @@ public void avoidRunningOutOfScopeDuringProvisioning() throws Exception {
     @Test
     public void runScope() throws Exception {
         FreeStyleProject asdf = j.createFreeStyleProject("asdf");
-        asdf.getBuildersList().add(new SleepBuilder(1000000));
+        JCloudsCleanupThreadTest.BuildBlocker bb = new JCloudsCleanupThreadTest.BuildBlocker();
+        asdf.getBuildersList().add(bb);
         FreeStyleBuild build = asdf.scheduleBuild2(0).waitForStart();
 
-        ServerScope.Build alive = new ServerScope.Build(build);
-        assertFalse(alive.isOutOfScope(mockServer));
-        assertEquals("run:asdf:1", alive.getValue());
-
-        ServerScope.Build rotated = new ServerScope.Build("asdf:42");
-        assertTrue(rotated.isOutOfScope(mockServer));
-        assertEquals("run:asdf:42", rotated.getValue());
+        bb.awaitStarted();
+        try {
+
+            ServerScope.Build alive = new ServerScope.Build(build);
+            assertFalse(alive.isOutOfScope(mockServer));
+            assertEquals("run:asdf:1", alive.getValue());
+
+            ServerScope.Build rotated = new ServerScope.Build("asdf:42");
+            assertTrue(rotated.isOutOfScope(mockServer));
+            assertEquals("run:asdf:42", rotated.getValue());
+
+            ServerScope.Build jobGone = new ServerScope.Build("nonono:1");
+            assertTrue(jobGone.isOutOfScope(mockServer));
+            assertEquals("run:nonono:1", jobGone.getValue());
+        } finally {
+            // Make sure the build terminates before ending the test.
+            // Active build is causing test harness to fail when deleting log files
+            bb.signalDone();
+            j.waitForCompletion(build);
+        }
 
-        ServerScope.Build jobGone = new ServerScope.Build("nonono:1");
-        assertTrue(jobGone.isOutOfScope(mockServer));
-        assertEquals("run:nonono:1", jobGone.getValue());
     }
 
     @Test @WithoutJenkins