HDFS-12599. Remove Mockito dependency from DataNodeTestUtils. Contributed by Ted Yu.

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/DataNodeTestUtils.java

@@ -29,7 +29,6 @@ import org.apache.hadoop.conf.ReconfigurationException;
 import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
-import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
 import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
 import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi;
 import org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetTestUtil;
@@ -37,16 +36,16 @@ import org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
 import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol;
 import org.apache.hadoop.test.GenericTestUtils;
-import org.mockito.Mockito;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import com.google.common.base.Supplier;
 
 import static org.hamcrest.core.Is.is;
 import static org.junit.Assert.assertThat;
-import static org.mockito.Matchers.any;
-import static org.mockito.Mockito.doAnswer;
+
+/**
+ * DO NOT ADD MOCKITO IMPORTS HERE Or Downstream projects may not
+ * be able to start mini dfs cluster. THANKS.
+ */
 
 /**
  * Utility class for accessing package-private DataNode information during tests.
@@ -196,27 +195,6 @@ public class DataNodeTestUtils {
     }
   }
 
-  /**
-   * This method is used to mock the data node block pinning API.
-   *
-   * @param dn datanode
-   * @param pinned true if the block is pinned, false otherwise
-   * @throws IOException
-   */
-  public static void mockDatanodeBlkPinning(final DataNode dn,
-      final boolean pinned) throws IOException {
-    final FsDatasetSpi<? extends FsVolumeSpi> data = dn.data;
-    dn.data = Mockito.spy(data);
-
-    doAnswer(new Answer<Object>() {
-      public Object answer(InvocationOnMock invocation) throws IOException {
-        // Bypass the argument to FsDatasetImpl#getPinning to show that
-        // the block is pinned.
-        return pinned;
-      }
-    }).when(dn.data).getPinning(any(ExtendedBlock.class));
-  }
-
   /**
    * Reconfigure a DataNode by setting a new list of volumes.
    *

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/InternalDataNodeTestUtils.java

@@ -32,7 +32,10 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState;
+import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
 import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB;
+import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
+import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi;
 import org.apache.hadoop.hdfs.server.namenode.NameNode;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
@@ -49,6 +52,9 @@ import org.mockito.stubbing.Answer;
 
 import com.google.common.base.Preconditions;
 
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.doAnswer;
+
 /**
  * An internal-facing only collection of test utilities for the DataNode. This
  * is to ensure that test-scope dependencies aren't inadvertently leaked
@@ -64,6 +70,27 @@ public class InternalDataNodeTestUtils {
     return dn.getDNRegistrationForBP(bpid);
   }
 
+  /**
+   * This method is used to mock the data node block pinning API.
+   *
+   * @param dn datanode
+   * @param pinned true if the block is pinned, false otherwise
+   * @throws IOException
+   */
+  public static void mockDatanodeBlkPinning(final DataNode dn,
+      final boolean pinned) throws IOException {
+    final FsDatasetSpi<? extends FsVolumeSpi> data = dn.data;
+    dn.data = Mockito.spy(data);
+
+    doAnswer(new Answer<Object>() {
+      public Object answer(InvocationOnMock invocation) throws IOException {
+        // Bypass the argument to FsDatasetImpl#getPinning to show that
+        // the block is pinned.
+        return pinned;
+      }
+    }).when(dn.data).getPinning(any(ExtendedBlock.class));
+  }
+
   /**
    * Insert a Mockito spy object between the given DataNode and
    * the given NameNode. This can be used to delay or wait for

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockReplacement.java

@@ -252,7 +252,7 @@ public class TestBlockReplacement {
       for (int i = 0; i < cluster.getDataNodes().size(); i++) {
         DataNode dn = cluster.getDataNodes().get(i);
         LOG.info("Simulate block pinning in datanode " + dn);
-        DataNodeTestUtils.mockDatanodeBlkPinning(dn, true);
+        InternalDataNodeTestUtils.mockDatanodeBlkPinning(dn, true);
       }
 
       // Block movement to a different datanode should fail as the block is

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/mover/TestMover.java

@@ -76,7 +76,7 @@ import org.apache.hadoop.hdfs.server.balancer.ExitStatus;
 import org.apache.hadoop.hdfs.server.balancer.NameNodeConnector;
 import org.apache.hadoop.hdfs.server.balancer.TestBalancer;
 import org.apache.hadoop.hdfs.server.datanode.DataNode;
-import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
+import org.apache.hadoop.hdfs.server.datanode.InternalDataNodeTestUtils;
 import org.apache.hadoop.hdfs.server.mover.Mover.MLocation;
 import org.apache.hadoop.hdfs.server.namenode.ha.HATestUtil;
 import org.apache.hadoop.http.HttpConfig;
@@ -758,7 +758,7 @@ public class TestMover {
       for (int i = 0; i < cluster.getDataNodes().size(); i++) {
         DataNode dn = cluster.getDataNodes().get(i);
         LOG.info("Simulate block pinning in datanode {}", dn);
-        DataNodeTestUtils.mockDatanodeBlkPinning(dn, true);
+        InternalDataNodeTestUtils.mockDatanodeBlkPinning(dn, true);
       }
 
       // move file blocks to ONE_SSD policy
@@ -896,7 +896,7 @@ public class TestMover {
       if (dn.getDatanodeId().getDatanodeUuid()
           .equals(datanodeInfo.getDatanodeUuid())) {
         LOG.info("Simulate block pinning in datanode {}", datanodeInfo);
-        DataNodeTestUtils.mockDatanodeBlkPinning(dn, true);
+        InternalDataNodeTestUtils.mockDatanodeBlkPinning(dn, true);
         break;
       }
     }