added unit test for GitGcTask

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/GitGcTask.java

@@ -31,6 +31,7 @@
 
 package sonia.scm.repository;
 
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Stopwatch;
 import com.google.inject.Inject;
 import java.io.File;
@@ -123,7 +124,7 @@ public class GitGcTask implements Runnable {
     File file = repositoryHandler.getDirectory(repository);
     Git git = null;
     try {
-      git = Git.open(file);
+      git = open(file);
       GarbageCollectCommand gcc = git.gc();
       // print statistics before execution, because it looks like
       // jgit returns the statistics after gc has finished
@@ -146,4 +147,18 @@ public class GitGcTask implements Runnable {
     }
   }
   
+  /**
+   * Opens the git repository. This method is only visible for testing purposes.
+   * 
+   * @param file repository directory
+   * 
+   * @return git for repository
+   * 
+   * @throws IOException 
+   */
+  @VisibleForTesting
+  protected Git open(File file) throws IOException {
+    return Git.open(file);
+  }
+
 }

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/GitGcTaskTest.java

@@ -0,0 +1,128 @@
+/***
+ * Copyright (c) 2015, Sebastian Sdorra
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * https://bitbucket.org/sdorra/scm-manager
+ * 
+ */
+
+package sonia.scm.repository;
+
+import com.google.common.collect.Lists;
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Properties;
+import org.eclipse.jgit.api.GarbageCollectCommand;
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.junit.Test;
+import static org.mockito.Mockito.*;
+import org.junit.Before;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * Unit tests for {@link GitGcTask}.
+ * 
+ * @author Sebastian Sdorra <sebastian.sdorra@triology.de>
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class GitGcTaskTest
+{
+
+  @Mock
+  private RepositoryManager manager;
+  
+  @Mock
+  private RepositoryDirectoryHandler handler;
+  
+  @Mock
+  private GarbageCollectCommand gcc;
+  
+  @Mock
+  private Git git;
+
+  private GitGcTask task;
+  
+  /**
+   * Setup mocks for tests.
+   * 
+   * @throws GitAPIException 
+   */
+  @Before
+  public void setUp() throws GitAPIException
+  {
+    when(git.gc()).thenReturn(gcc);
+    when(gcc.getStatistics()).thenReturn(new Properties());
+    when(gcc.call()).thenReturn(new Properties());
+    when(manager.getHandler(GitRepositoryHandler.TYPE_NAME)).thenReturn(handler);
+    task = new GitGcTask(manager){
+      
+      @Override
+      protected Git open(File file) throws IOException
+      {
+        return git;
+      }
+      
+    };
+  }
+
+  /**
+   * Tests {@link GitGcTask#run()}.
+   * 
+   * @throws GitAPIException 
+   */
+  @Test
+  public void testRun() throws GitAPIException
+  {
+    // prepare repositories for task
+    Repository unhealthy = mock(Repository.class);
+    when(unhealthy.getType()).thenReturn("git");
+    when(unhealthy.isHealthy()).thenReturn(Boolean.FALSE);
+    
+    Repository invalid = mock(Repository.class);
+    when(unhealthy.getType()).thenReturn("git");
+    when(unhealthy.isValid()).thenReturn(Boolean.FALSE);
+    
+    List<Repository> repositories = Lists.newArrayList(
+        RepositoryTestData.create42Puzzle("git"),
+        RepositoryTestData.createHeartOfGold("hg"),
+        unhealthy,
+        invalid
+    );
+    when(manager.getAll()).thenReturn(repositories);
+    
+    // run
+    task.run();
+    
+    // gc command should only be called once
+    verify(gcc).getStatistics();
+    verify(gcc).call();
+  }
+
+}