HADOOP-11282. Skip NFS TestShellBasedIdMapping tests that are irrelevant on Windows. Contributed by Chris Nauroth.

(cherry picked from commit 68db5b3736287ef218acc861368c6b95b72fa2f4)
(cherry picked from commit 3ef876712c389391784068fe05f724d84957bbec)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -675,6 +675,9 @@ Release 2.6.0 - UNRELEASED
     HADOOP-11280. TestWinUtils#testChmod fails after removal of
     NO_PROPAGATE_INHERIT_ACE. (cnauroth)
 
+    HADOOP-11282. Skip NFS TestShellBasedIdMapping tests that are irrelevant on
+    Windows. (cnauroth)
+
 Release 2.5.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/TestShellBasedIdMapping.java

@@ -19,6 +19,7 @@ package org.apache.hadoop.security;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeTrue;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -27,6 +28,7 @@ import java.io.OutputStream;
 import java.util.Map;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.util.Shell;
 import org.apache.hadoop.security.ShellBasedIdMapping.PassThroughMap;
 import org.apache.hadoop.security.ShellBasedIdMapping.StaticMapping;
 import org.junit.Test;
@@ -73,6 +75,7 @@ public class TestShellBasedIdMapping {
   
   @Test
   public void testStaticMapping() throws IOException {
+    assumeTrue(!Shell.WINDOWS);
     Map<Integer, Integer> uidStaticMap = new PassThroughMap<Integer>();
     Map<Integer, Integer> gidStaticMap = new PassThroughMap<Integer>();
     
@@ -113,6 +116,7 @@ public class TestShellBasedIdMapping {
 
   @Test
   public void testDuplicates() throws IOException {
+    assumeTrue(!Shell.WINDOWS);
     String GET_ALL_USERS_CMD = "echo \"root:x:0:0:root:/root:/bin/bash\n"
         + "hdfs:x:11501:10787:Grid Distributed File System:/home/hdfs:/bin/bash\n"
         + "hdfs:x:11502:10788:Grid Distributed File System:/home/hdfs:/bin/bash\n"
@@ -152,6 +156,7 @@ public class TestShellBasedIdMapping {
 
   @Test
   public void testIdOutOfIntegerRange() throws IOException {
+    assumeTrue(!Shell.WINDOWS);
     String GET_ALL_USERS_CMD = "echo \""
         + "nfsnobody:x:4294967294:4294967294:Anonymous NFS User:/var/lib/nfs:/sbin/nologin\n"
         + "nfsnobody1:x:4294967295:4294967295:Anonymous NFS User:/var/lib/nfs1:/sbin/nologin\n"