Add a test for org.eclipse.jgit.pgm.Tag

The test checks if an error is thrown when trying to create the same tag
for the second time.

Change-Id: I4ed2f6c997587f0ea23bd26a32fb64a2d48a980e
Signed-off-by: Chris Aniszczyk <zx@twitter.com>

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/TagTest.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2012, Tomasz Zarna <tomasz.zarna@tasktop.com> and others.
+ * 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.pgm;
+
+import static org.junit.Assert.assertEquals;
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.junit.Before;
+import org.junit.Test;
+
+public class TagTest extends CLIRepositoryTestCase {
+	private Git git;
+
+	@Override
+	@Before
+	public void setUp() throws Exception {
+		super.setUp();
+		git = new Git(db);
+		git.commit().setMessage("initial commit").call();
+	}
+
+	@Test
+	public void testTagTwice() throws Exception {
+		git.tag().setName("test").call();
+		writeTrashFile("file", "content");
+		git.add().addFilepattern("file").call();
+		git.commit().setMessage("commit").call();
+
+		assertEquals("fatal: tag 'test' already exists",
+				execute("git tag test")[0]);
+	}
+}

org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/CLIText.properties

@@ -150,6 +150,7 @@ statusNewFile=new file:
 statusRemoved=deleted:
 switchedToNewBranch=Switched to a new branch ''{0}''
 switchedToBranch=Switched to branch ''{0}''
+tagAlreadyExists=tag ''{0}'' already exists
 tagLabel=tag
 taggerInfo=Tagger: {0} <{1}>
 timeInMilliSeconds={0} ms

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/CLIText.java

@@ -211,6 +211,7 @@ public static String formatLine(String line) {
 	/***/ public String statusRemoved;
 	/***/ public String switchedToNewBranch;
 	/***/ public String switchedToBranch;
+	/***/ public String tagAlreadyExists;
 	/***/ public String tagLabel;
 	/***/ public String taggerInfo;
 	/***/ public String timeInMilliSeconds;

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Tag.java

@@ -48,11 +48,13 @@
 
 package org.eclipse.jgit.pgm;
 
+import java.text.MessageFormat;
 import java.util.List;
 
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ListTagCommand;
 import org.eclipse.jgit.api.TagCommand;
+import org.eclipse.jgit.api.errors.RefAlreadyExistsException;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.Repository;
@@ -85,8 +87,12 @@ protected void run() throws Exception {
 				RevWalk walk = new RevWalk(db);
 				command.setObjectId(walk.parseAny(object));
 			}
-
-			command.call();
+			try {
+				command.call();
+			} catch (RefAlreadyExistsException e) {
+				throw die(MessageFormat.format(CLIText.get().tagAlreadyExists,
+						tagName));
+			}
 		} else {
 			ListTagCommand command = git.tagList();
 			List<Ref> list = command.call();

org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties

@@ -451,6 +451,7 @@ submoduleParentRemoteUrlInvalid=Cannot remove segment from remote url ''{0}''
 submodulesNotSupported=Submodules are not supported
 symlinkCannotBeWrittenAsTheLinkTarget=Symlink "{0}" cannot be written as the link target cannot be read from within Java.
 systemConfigFileInvalid=Systen wide config file {0} is invalid {1}
+tagAlreadyExists=tag ''{0}'' already exists
 tagNameInvalid=tag name {0} is invalid
 tagOnRepoWithoutHEADCurrentlyNotSupported=Tag on repository without HEAD currently not supported
 theFactoryMustNotBeNull=The factory must not be null

org.eclipse.jgit/src/org/eclipse/jgit/api/TagCommand.java

@@ -50,6 +50,7 @@
 import org.eclipse.jgit.api.errors.InvalidTagNameException;
 import org.eclipse.jgit.api.errors.JGitInternalException;
 import org.eclipse.jgit.api.errors.NoHeadException;
+import org.eclipse.jgit.api.errors.RefAlreadyExistsException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
@@ -151,6 +152,11 @@ public Ref call() throws GitAPIException, ConcurrentRefUpdateException,
 						throw new ConcurrentRefUpdateException(
 								JGitText.get().couldNotLockHEAD,
 								tagRef.getRef(), updateResult);
+					case REJECTED:
+						throw new RefAlreadyExistsException(
+								MessageFormat.format(
+										JGitText.get().tagAlreadyExists,
+										newTag.toString()));
 					default:
 						throw new JGitInternalException(MessageFormat.format(
 								JGitText.get().updatingRefFailed, refName,

org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java

@@ -511,6 +511,7 @@ public static JGitText get() {
 	/***/ public String submoduleParentRemoteUrlInvalid;
 	/***/ public String symlinkCannotBeWrittenAsTheLinkTarget;
 	/***/ public String systemConfigFileInvalid;
+	/***/ public String tagAlreadyExists;
 	/***/ public String tagNameInvalid;
 	/***/ public String tagOnRepoWithoutHEADCurrentlyNotSupported;
 	/***/ public String theFactoryMustNotBeNull;