DirCacheCheckoutTest: Open Git and TreeWalk in try-with-resource

Change-Id: Icc8eda841e6a437e1acf3438525014e7c46d5eb2
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/DirCacheCheckoutTest.java

@@ -140,7 +140,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 	@Test
 	public void testResetHard() throws IOException, NoFilepatternException,
 			GitAPIException {
-		Git git = new Git(db);
+		try (Git git = new Git(db)) {
 			writeTrashFile("f", "f()");
 			writeTrashFile("D/g", "g()");
 			git.add().addFilepattern(".").call();
@@ -187,6 +187,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 			assertWorkDir(mkmap("f", "f()\nmaster", "D/g", "g()\ng2()", "E/h",
 					"h()", "untracked", "untracked"));
 		}
+	}
 
 	/**
 	 * Reset hard from unclean condition.
@@ -200,7 +201,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 	@Test
 	public void testResetHardFromIndexEntryWithoutFileToTreeWithoutFile()
 			throws Exception {
-		Git git = new Git(db);
+		try (Git git = new Git(db)) {
 			writeTrashFile("x", "x");
 			git.add().addFilepattern("x").call();
 			RevCommit id1 = git.commit().setMessage("c1").call();
@@ -216,6 +217,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 			git.reset().setMode(ResetType.HARD).setRef(id1.getName()).call();
 			assertIndex(mkmap("x", "x"));
 		}
+	}
 
 	/**
 	 * Test first checkout in a repo
@@ -224,8 +226,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 	 */
 	@Test
 	public void testInitialCheckout() throws Exception {
-		Git git = new Git(db);
-
+		try (Git git = new Git(db)) {
 			TestRepository<Repository> db_t = new TestRepository<Repository>(db);
 			BranchBuilder master = db_t.branch("master");
 			master.commit().add("f", "1").message("m0").create();
@@ -233,6 +234,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 			git.checkout().setName("master").call();
 			assertTrue(new File(db.getWorkTree(), "f").exists());
 		}
+	}
 
 	private DirCacheCheckout resetHard(RevCommit commit)
 			throws NoWorkTreeException,
@@ -1612,7 +1614,7 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 	public void assertWorkDir(Map<String, String> i)
 			throws CorruptObjectException,
 			IOException {
-		TreeWalk walk = new TreeWalk(db);
+		try (TreeWalk walk = new TreeWalk(db)) {
 			walk.setRecursive(false);
 			walk.addTree(new FileTreeIterator(db));
 			String expectedValue;
@@ -1654,4 +1656,5 @@ public class DirCacheCheckoutTest extends RepositoryTestCase {
 			}
 			assertEquals("WorkDir has not the right size.", i.size(), nrFiles);
 		}
+	}
 }