Add CleanCommandTest and fix CleanCommand

Bug: 334767
Change-Id: I0a836451ceb668f943b1f353dc65420157810b23
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CleanCommandTest.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2011, Abhishek Bhatnagar <abhatnag@redhat.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 static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.Set;
+import java.util.TreeSet;
+
+import org.eclipse.jgit.errors.NoWorkTreeException;
+import org.eclipse.jgit.lib.RepositoryTestCase;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Tests for CleanCommand
+ */
+public class CleanCommandTest extends RepositoryTestCase {
+	private Git git;
+
+	@Before
+	public void setUp() throws Exception {
+		super.setUp();
+		git = new Git(db);
+
+		// create test files
+		writeTrashFile("File1.txt", "Hello world");
+		writeTrashFile("File2.txt", "Delete Me");
+		writeTrashFile("File3.txt", "Delete Me");
+
+		// add and commit first file
+		git.add().addFilepattern("File1.txt").call();
+		git.commit().setMessage("Initial commit").call();
+	}
+
+	@Test
+	public void testClean() throws NoWorkTreeException, IOException {
+		// create status
+		StatusCommand command = git.status();
+		Status status = command.call();
+		Set<String> files = status.getUntracked();
+		assertTrue(files.size() > 0);
+
+		// run clean
+		Set<String> cleanedFiles = git.clean().call();
+
+		status = git.status().call();
+		files = status.getUntracked();
+
+		assertTrue(files.size() == 0);
+		assertTrue(cleanedFiles.contains("File2.txt"));
+		assertTrue(cleanedFiles.contains("File3.txt"));
+	}
+
+	@Test
+	public void testCleanWithPaths() throws NoWorkTreeException, IOException {
+		// create status
+		StatusCommand command = git.status();
+		Status status = command.call();
+		Set<String> files = status.getUntracked();
+		assertTrue(files.size() > 0);
+
+		// run clean with setPaths
+		Set<String> paths = new TreeSet<String>();
+		paths.add("File3.txt");
+		Set<String> cleanedFiles = git.clean().setPaths(paths).call();
+
+		status = git.status().call();
+		files = status.getUntracked();
+		assertTrue(files.size() == 1);
+		assertTrue(cleanedFiles.contains("File3.txt"));
+		assertTrue(!cleanedFiles.contains("File2.txt"));
+	}
+
+}

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

@@ -47,6 +47,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.Set;
+import java.util.TreeSet;
 
 import org.eclipse.jgit.api.errors.JGitInternalException;
 import org.eclipse.jgit.lib.Repository;
@@ -79,15 +80,15 @@ public class CleanCommand extends GitCommand<Set<String>> {
 	 * @return a set of strings representing each file cleaned.
 	 */
 	public Set<String> call() {
-		Set<String> files = Collections.emptySet();
+		Set<String> files = new TreeSet<String>();
 		try {
 			StatusCommand command = new StatusCommand(repo);
 			Status status = command.call();
-			files = status.getUntracked();
-
-			for (String file : files) {
-				if (paths.isEmpty() || paths.contains(file))
+			for (String file : status.getUntracked()) {
+				if (paths.isEmpty() || paths.contains(file)) {
 					FileUtils.delete(new File(repo.getWorkTree(), file));
+					files.add(file);
+				}
 			}
 		} catch (IOException e) {
 			throw new JGitInternalException(e.getMessage(), e);