HDFS-12505. Extend TestFileStatusWithECPolicy with a random EC policy. Contributed by Takanobu Asanuma.

(cherry picked from commit 84c1095586)

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileStatusWithECPolicy.java

@@ -34,7 +34,10 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.Timeout;
 
-public class TestFileStatusWithECPolicy {
+/**
+ * This test ensures the statuses of EC files with the default policy.
+ */
+public class TestFileStatusWithDefaultECPolicy {
   private MiniDFSCluster cluster;
   private DistributedFileSystem fs;
   private DFSClient client;
@@ -50,8 +53,7 @@ public class TestFileStatusWithECPolicy {
     cluster.waitActive();
     fs = cluster.getFileSystem();
     client = fs.getClient();
-    fs.enableErasureCodingPolicy(
-        StripedFileTestUtil.getDefaultECPolicy().getName());
+    fs.enableErasureCodingPolicy(getEcPolicy().getName());
   }
 
   @After
@@ -62,6 +64,10 @@ public class TestFileStatusWithECPolicy {
     }
   }
 
+  public ErasureCodingPolicy getEcPolicy() {
+    return StripedFileTestUtil.getDefaultECPolicy();
+  }
+
   @Test
   public void testFileStatusWithECPolicy() throws Exception {
     // test directory doesn't have an EC policy
@@ -76,8 +82,7 @@ public class TestFileStatusWithECPolicy {
     ContractTestUtils.assertNotErasureCoded(fs, file);
     fs.delete(file, true);
 
-    final ErasureCodingPolicy ecPolicy1 =
-        StripedFileTestUtil.getDefaultECPolicy();
+    final ErasureCodingPolicy ecPolicy1 = getEcPolicy();
     // set EC policy on dir
     fs.setErasureCodingPolicy(dir, ecPolicy1.getName());
     ContractTestUtils.assertErasureCoded(fs, dir);

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileStatusWithRandomECPolicy.java

@@ -0,0 +1,49 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs;
+
+import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This test extends TestFileStatusWithDefaultECPolicy to use a random
+ * (non-default) EC policy.
+ */
+public class TestFileStatusWithRandomECPolicy extends
+    TestFileStatusWithDefaultECPolicy {
+  private static final Logger LOG = LoggerFactory.getLogger(
+      TestFileStatusWithRandomECPolicy.class);
+
+  private ErasureCodingPolicy ecPolicy;
+
+  public TestFileStatusWithRandomECPolicy() {
+    // If you want to debug this test with a specific ec policy, please use
+    // SystemErasureCodingPolicies class.
+    // e.g. ecPolicy = SystemErasureCodingPolicies.getByID(RS_3_2_POLICY_ID);
+    ecPolicy = StripedFileTestUtil.getRandomNonDefaultECPolicy();
+    LOG.info("run {} with {}.",
+        TestFileStatusWithRandomECPolicy.class
+            .getSuperclass().getSimpleName(), ecPolicy.getName());
+  }
+
+  @Override
+  public ErasureCodingPolicy getEcPolicy() {
+    return ecPolicy;
+  }
+}