HADOOP-3086. Adds the testcase missed during commit of hadoop-3040. Contributed by Amareshwari Sriramadasu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@640766 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -352,6 +352,9 @@ Trunk (unreleased changes)
     HADOOP-3080. Removes flush calls from JobHistory.
     (Amareshwari Sriramadasu via ddas) 
 
+    HADOOP-3086. Adds the testcase missed during commit of hadoop-3040.
+    (Amareshwari Sriramadasu via ddas)
+
 Release 0.16.2 - Unreleased
 
   BUG FIXES

src/contrib/streaming/src/test/org/apache/hadoop/streaming/TestStreamingKeyValue.java

@@ -0,0 +1,116 @@
+/**
+ * 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.streaming;
+
+import junit.framework.TestCase;
+import java.io.*;
+
+/**
+ * This class tests hadoopStreaming in MapReduce local mode.
+ * This testcase looks at different cases of tab position in input. 
+ */
+public class TestStreamingKeyValue extends TestCase
+{
+  protected File INPUT_FILE = new File("input.txt");
+  protected File OUTPUT_DIR = new File("stream_out");
+  // First line of input has 'key' 'tab' 'value'
+  // Second line of input starts with a tab character. 
+  // So, it has empty key and the whole line as value.
+  // Third line of input does not have any tab character.
+  // So, the whole line is the key and value is empty.
+  protected String input = 
+    "roses are \tred\t\n\tviolets are blue\nbunnies are pink\n";
+  protected String outputExpect = 
+    "\tviolets are blue\nbunnies are pink\t\nroses are \tred\t\n";
+
+  private StreamJob job;
+
+  public TestStreamingKeyValue() throws IOException
+  {
+    UtilTest utilTest = new UtilTest(getClass().getName());
+    utilTest.checkUserDir();
+    utilTest.redirectIfAntJunit();
+  }
+
+  protected void createInput() throws IOException
+  {
+    DataOutputStream out = new DataOutputStream(
+       new FileOutputStream(INPUT_FILE.getAbsoluteFile()));
+    out.write(input.getBytes("UTF-8"));
+    out.close();
+  }
+
+  protected String[] genArgs() {
+    return new String[] {
+      "-input", INPUT_FILE.getAbsolutePath(),
+      "-output", OUTPUT_DIR.getAbsolutePath(),
+      "-mapper", "cat",
+      "-jobconf", "keep.failed.task.files=true",
+      "-jobconf", "stream.non.zero.exit.is.failure=true",
+      "-jobconf", "stream.tmpdir="+System.getProperty("test.build.data","/tmp")
+    };
+  }
+  
+  public void testCommandLine()
+  {
+    String outFileName = "part-00000";
+    File outFile = null;
+    try {
+      try {
+        OUTPUT_DIR.getAbsoluteFile().delete();
+      } catch (Exception e) {
+      }
+
+      createInput();
+      boolean mayExit = false;
+
+      // During tests, the default Configuration will use a local mapred
+      // So don't specify -config or -cluster
+      job = new StreamJob(genArgs(), mayExit);      
+      job.go();
+      outFile = new File(OUTPUT_DIR, outFileName).getAbsoluteFile();
+      String output = StreamUtil.slurp(outFile);
+      System.err.println("outEx1=" + outputExpect);
+      System.err.println("  out1=" + output);
+      assertEquals(outputExpect, output);
+    } catch(Exception e) {
+      failTrace(e);
+    } finally {
+      outFile.delete();
+      File outFileCRC = new File(OUTPUT_DIR,
+                          "." + outFileName + ".crc").getAbsoluteFile();
+      INPUT_FILE.delete();
+      outFileCRC.delete();
+      OUTPUT_DIR.getAbsoluteFile().delete();
+    }
+  }
+
+  private void failTrace(Exception e)
+  {
+    StringWriter sw = new StringWriter();
+    e.printStackTrace(new PrintWriter(sw));
+    fail(sw.toString());
+  }
+
+  public static void main(String[]args) throws Exception
+  {
+    new TestStreamingKeyValue().testCommandLine();
+  }
+
+}