InterIndexDiffFilterTest: Open TreeWalk in try-with-resource

Change-Id: Ie0046771b1ab1c9784d9a3bb597a9d76c6c3017d
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/treewalk/filter/InterIndexDiffFilterTest.java

@@ -76,11 +76,12 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 	public void testEmpty() throws IOException {
 		DirCache dc1 = DirCache.newInCore();
 		DirCache dc2 = DirCache.newInCore();
-		TreeWalk tw = new TreeWalk(db);
+		try (TreeWalk tw = new TreeWalk(db)) {
 			tw.addTree(new DirCacheIterator(dc1));
 			tw.addTree(new DirCacheIterator(dc2));
 			assertFalse(tw.next());
 		}
+	}
 
 	static final class AddEdit extends PathEdit {
 
@@ -124,7 +125,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		editor.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("a"), 1, false));
 		editor.finish();
 
-		TreeWalk tw = new TreeWalk(db);
+		try (TreeWalk tw = new TreeWalk(db)) {
 			tw.setRecursive(true);
 			tw.addTree(new DirCacheIterator(dc1));
 			tw.addTree(new DirCacheIterator(dc2));
@@ -133,6 +134,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 			assertEquals("a/a", tw.getPathString());
 			assertFalse(tw.next());
 		}
+	}
 
 	@Test
 	public void testTwoSame() throws IOException {
@@ -145,7 +147,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		ed2.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("a"), 1, false));
 		ed2.finish();
 
-		TreeWalk tw = new TreeWalk(db);
+		try (TreeWalk tw = new TreeWalk(db)) {
 			tw.setRecursive(true);
 			tw.addTree(new DirCacheIterator(dc1));
 			tw.addTree(new DirCacheIterator(dc2));
@@ -153,6 +155,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 
 			assertFalse(tw.next());
 		}
+	}
 
 	@Test
 	public void testTwoSameDifferByAssumeValid() throws IOException {
@@ -165,7 +168,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		ed2.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("a"), 1, true));
 		ed2.finish();
 
-		TreeWalk tw = new TreeWalk(db);
+		try (TreeWalk tw = new TreeWalk(db)) {
 			tw.setRecursive(true);
 			tw.addTree(new DirCacheIterator(dc1));
 			tw.addTree(new DirCacheIterator(dc2));
@@ -175,6 +178,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 			assertEquals("a/a", tw.getPathString());
 			assertFalse(tw.next());
 		}
+	}
 
 	@Test
 	public void testTwoSameSameAssumeValidDifferentContent()
@@ -188,7 +192,7 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		ed2.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("b"), 1, true));
 		ed2.finish();
 
-		TreeWalk tw = new TreeWalk(db);
+		try (TreeWalk tw = new TreeWalk(db)) {
 			tw.setRecursive(true);
 			tw.addTree(new DirCacheIterator(dc1));
 			tw.addTree(new DirCacheIterator(dc2));
@@ -197,3 +201,4 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 			assertFalse(tw.next());
 		}
 	}
+}