Add CheckoutCommand

Add the ability to checkout a branch to the working tree.

Bug: 330860
Change-Id: Ie06b9e799a9e1be384da0b8996efa7209b32eac3
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

1 files changed, 123 insertions, 0 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CheckoutCommandTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CheckoutCommandTest.java
new file mode 100644
index 0000000000..295a284c02
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CheckoutCommandTest.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2010, Chris Aniszczyk <caniszczyk@gmail.com>
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.eclipse.jgit.api;
+
+import java.io.IOException;
+
+import org.eclipse.jgit.api.errors.InvalidRefNameException;
+import org.eclipse.jgit.api.errors.JGitInternalException;
+import org.eclipse.jgit.api.errors.RefAlreadyExistsException;
+import org.eclipse.jgit.api.errors.RefNotFoundException;
+import org.eclipse.jgit.lib.Constants;
+import org.eclipse.jgit.lib.RefUpdate;
+import org.eclipse.jgit.lib.RepositoryTestCase;
+import org.eclipse.jgit.revwalk.RevCommit;
+
+public class CheckoutCommandTest extends RepositoryTestCase {
+	private Git git;
+
+	RevCommit initialCommit;
+
+	RevCommit secondCommit;
+
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+		git = new Git(db);
+		// commit something
+		writeTrashFile("Test.txt", "Hello world");
+		git.add().addFilepattern("Test.txt").call();
+		initialCommit = git.commit().setMessage("Initial commit").call();
+
+		// create a master branch and switch to it
+		git.branchCreate().setName("test").call();
+		RefUpdate rup = db.updateRef(Constants.HEAD);
+		rup.link("refs/heads/test");
+
+		// commit something on the test branch
+		writeTrashFile("Test.txt", "Some change");
+		git.add().addFilepattern("Test.txt").call();
+		secondCommit = git.commit().setMessage("Second commit").call();
+	}
+
+	public void testSimpleCheckout() {
+		try {
+			git.checkout().setName("test").call();
+		} catch (Exception e) {
+			fail(e.getMessage());
+		}
+	}
+
+	public void testCheckout() {
+		try {
+			git.checkout().setName("test").call();
+			assertEquals("[Test.txt, mode:100644, content:Some change]",
+					indexState(CONTENT));
+			git.checkout().setName("master").call();
+			assertEquals("[Test.txt, mode:100644, content:Hello world]",
+					indexState(CONTENT));
+		} catch (Exception e) {
+			fail(e.getMessage());
+		}
+	}
+
+	public void testCreateBranchOnCheckout() throws IOException {
+		try {
+			git.checkout().setCreateBranch(true).setName("test2").call();
+		} catch (Exception e) {
+			fail(e.getMessage());
+		}
+		assertNotNull(db.getRef("test2"));
+	}
+
+	public void testCheckoutToNonExistingBranch() throws JGitInternalException,
+			RefAlreadyExistsException, InvalidRefNameException {
+		try {
+			git.checkout().setName("badbranch").call();
+			fail("Should have failed");
+		} catch (RefNotFoundException e) {
+			// except to hit here
+		}
+	}
+
+}