Add diff formatter that generates a list of style ranges

This class will be used for a general purpose diff
viewer available as a tab in the commit viewer.

Bug: 343000
Change-Id: Ic2eb3e178f5a049154bd5744da3010fa791a9933
Signed-off-by: Kevin Sawicki <kevin@github.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/org.eclipse.egit.ui.test/src/org/eclipse/egit/ui/test/commit/DiffStyleRangeFormatterTest.java b/org.eclipse.egit.ui.test/src/org/eclipse/egit/ui/test/commit/DiffStyleRangeFormatterTest.java
new file mode 100644
index 0000000000..64cc3ba8d2
--- /dev/null
+++ b/org.eclipse.egit.ui.test/src/org/eclipse/egit/ui/test/commit/DiffStyleRangeFormatterTest.java
@@ -0,0 +1,79 @@
+/*******************************************************************************
+ *  Copyright (c) 2011 GitHub Inc.
+ *  All rights reserved. This program and the accompanying materials
+ *  are made available under the terms of the Eclipse Public License v1.0
+ *  which accompanies this distribution, and is available at
+ *  http://www.eclipse.org/legal/epl-v10.html
+ *
+ *  Contributors:
+ *    Kevin Sawicki (GitHub Inc.) - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.egit.ui.test.commit;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+
+import org.eclipse.egit.core.Activator;
+import org.eclipse.egit.ui.common.LocalRepositoryTestCase;
+import org.eclipse.egit.ui.internal.commit.DiffStyleRangeFormatter;
+import org.eclipse.egit.ui.internal.commit.DiffStyleRangeFormatter.DiffStyleRange;
+import org.eclipse.jface.text.Document;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jgit.lib.Constants;
+import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.revwalk.RevCommit;
+import org.eclipse.jgit.revwalk.RevWalk;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+/**
+ * Unit tests for {@link DiffStyleRangeFormatter}
+ */
+public class DiffStyleRangeFormatterTest extends LocalRepositoryTestCase {
+
+	private static Repository repository;
+
+	private static RevCommit commit;
+
+	@BeforeClass
+	public static void setup() throws Exception {
+		File repoFile = createProjectAndCommitToRepository();
+		assertNotNull(repoFile);
+		repository = Activator.getDefault().getRepositoryCache()
+				.lookupRepository(repoFile);
+		assertNotNull(repository);
+
+		RevWalk walk = new RevWalk(repository);
+		try {
+			commit = walk.parseCommit(repository.resolve(Constants.HEAD));
+			assertNotNull(commit);
+			walk.parseBody(commit.getParent(0));
+		} finally {
+			walk.release();
+		}
+	}
+
+	@Test
+	public void testRanges() throws Exception {
+		IDocument document = new Document();
+		DiffStyleRangeFormatter formatter = new DiffStyleRangeFormatter(
+				document);
+		formatter.setRepository(repository);
+		formatter.format(commit.getTree(), commit.getParent(0).getTree());
+		assertTrue(document.getLength() > 0);
+		DiffStyleRange[] ranges = formatter.getRanges();
+		assertNotNull(ranges);
+		assertTrue(ranges.length > 0);
+		for (DiffStyleRange range : ranges) {
+			assertNotNull(range);
+			assertNotNull(range.diffType);
+			assertTrue(range.start >= 0);
+			assertTrue(range.length >= 0);
+			assertTrue(range.start < document.getLength());
+		}
+
+	}
+
+}