UT improvement : Check that symlinks resources are preserved during git clone

src/test/java/org/codehaus/plexus/util/DirectoryScannerTest.java

@@ -20,17 +20,22 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeTrue;
 
 import java.io.File;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TestName;
 
 /**
  * Base class for testcases doing tests with files.
@@ -40,6 +45,9 @@
 public class DirectoryScannerTest
     extends FileBasedTestCase
 {
+    @Rule
+    public TestName name = new TestName();
+
     private static String testDir = getTestDirectory().getPath();
 
     @Test
@@ -118,6 +126,47 @@ private void createTestFiles()
         this.createFile( new File( testDir + "/scanner4.dat" ), 0 );
         this.createFile( new File( testDir + "/scanner5.dat" ), 0 );
     }
+
+    /**
+     * Check if 'src/test/resources/symlinks/src/sym*' test files (start with 'sym') exist and are symlinks.<br>
+     * On some OS (like Windows 10), the 'git clone' requires to be executed with admin permissions and the
+     * 'core.symlinks=true' git option.
+     * 
+     * @return true If files here and symlinks, false otherwise
+     */
+    private boolean checkTestFilesSymlinks()
+    {
+        File symlinksDirectory = new File( "src/test/resources/symlinks/src" );
+        try
+        {
+            List<String> symlinks =
+                FileUtils.getFileAndDirectoryNames( symlinksDirectory, "sym*", null, true, true, true, true );
+            if ( symlinks.isEmpty() )
+            {
+                throw new IOException( "Symlinks files/directories are not present" );
+            }
+            for ( String symLink : symlinks )
+            {
+                if ( !Files.isSymbolicLink( Paths.get( symLink ) ) )
+                {
+                    throw new IOException( String.format( "Path is not a symlink: %s", symLink ) );
+                }
+            }
+            return true;
+        }
+        catch ( IOException e )
+        {
+            System.err.println( String.format( "The unit test '%s.%s' will be skipped, reason: %s",
+                                               this.getClass().getSimpleName(), name.getMethodName(),
+                                               e.getMessage() ) );
+            System.out.println( String.format( "This test requires symlinks files in '%s' directory.",
+                                               symlinksDirectory.getPath() ) );
+            System.out.println( "On some OS (like Windows 10), files are present only if the clone/checkout is done"
+                + " in administrator mode, and correct (symlinks and not flat file/directory)"
+                + " if symlinks option are used (for git: git clone -c core.symlinks=true [url])" );
+            return false;
+        }
+    }
 
     @Test
     public void testGeneral()
@@ -158,6 +207,8 @@ public void testIncludesExcludesWithWhiteSpaces()
     @Test
     public void testFollowSymlinksFalse()
     {
+        assumeTrue( checkTestFilesSymlinks() );
+
         DirectoryScanner ds = new DirectoryScanner();
         ds.setBasedir( new File( "src/test/resources/symlinks/src/" ) );
         ds.setFollowSymlinks( false );
@@ -190,6 +241,8 @@ private void assertAlwaysIncluded( List<String> included )
     @Test
     public void testFollowSymlinks()
     {
+        assumeTrue( checkTestFilesSymlinks() );
+
         DirectoryScanner ds = new DirectoryScanner();
         ds.setBasedir( new File( "src/test/resources/symlinks/src/" ) );
         ds.setFollowSymlinks( true );
@@ -428,11 +481,7 @@ public void testRegexWithSlashInsideCharacterClass()
     public void testIsSymbolicLink()
         throws IOException
     {
-        // TODO: Uncomment when PR #25 merged
-        // if ( !checkTestFilesSymlinks() )
-        // {
-        // return;
-        // }
+        assumeTrue( checkTestFilesSymlinks() );
 
         final File directory = new File( "src/test/resources/symlinks/src" );
         DirectoryScanner ds = new DirectoryScanner();
@@ -446,11 +495,7 @@ public void testIsSymbolicLink()
     public void testIsParentSymbolicLink()
         throws IOException
     {
-        // TODO: Uncomment when PR #25 merged
-        // if ( !checkTestFilesSymlinks() )
-        // {
-        // return;
-        // }
+        assumeTrue( checkTestFilesSymlinks() );
 
         final File directory = new File( "src/test/resources/symlinks/src" );
         DirectoryScanner ds = new DirectoryScanner();