/*
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    * and other copyright owners as documented in the project's IP log.
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    * This program and the accompanying materials are made available
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    * available at http://www.eclipse.org/org/documents/edl-v10.php
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  package org.eclipse.jgit.api;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  
  import java.io.File;
  
  import org.eclipse.jgit.api.MergeCommand.FastForwardMode;
  import org.eclipse.jgit.api.ResetCommand.ResetType;
  import org.eclipse.jgit.blame.BlameResult;
  import org.eclipse.jgit.diff.RawTextComparator;
  import org.eclipse.jgit.junit.RepositoryTestCase;
  import org.eclipse.jgit.lib.ConfigConstants;
  import org.eclipse.jgit.lib.CoreConfig.AutoCRLF;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.eclipse.jgit.storage.file.FileBasedConfig;
  import org.junit.Test;
  
  /**
   * Unit tests of {@link BlameCommand}
   */
  public class BlameCommandTest extends RepositoryTestCase {
  
  	private static String join(String... lines) {
  		StringBuilder joined = new StringBuilder();
  		for (String line : lines)
  			joined.append(line).append('\n');
  		return joined.toString();
  	}
  
  	@Test
  	public void testSingleRevision() throws Exception {
  		Git git = new Git(db);
  
  		String[] content = new String[] { "first", "second", "third" };
  
  		writeTrashFile("file.txt", join(content));
  		git.add().addFilepattern("file.txt").call();
  		RevCommit commit = git.commit().setMessage("create file").call();
  
  		BlameCommand command = new BlameCommand(db);
  		command.setFilePath("file.txt");
  		BlameResult lines = command.call();
  		assertNotNull(lines);
  		assertEquals(3, lines.getResultContents().size());
  
  		for (int i = 0; i < 3; i++) {
  			assertEquals(commit, lines.getSourceCommit(i));
  			assertEquals(i, lines.getSourceLine(i));
  		}
  	}
  
  	@Test
  	public void testTwoRevisions() throws Exception {
  		Git git = new Git(db);
  
  		String[] content1 = new String[] { "first", "second" };
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit1 = git.commit().setMessage("create file").call();
 
 		String[] content2 = new String[] { "first", "second", "third" };
 		writeTrashFile("file.txt", join(content2));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit2 = git.commit().setMessage("create file").call();
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 		assertEquals(3, lines.getResultContents().size());
 
 		assertEquals(commit1, lines.getSourceCommit(0));
 		assertEquals(0, lines.getSourceLine(0));
 
 		assertEquals(commit1, lines.getSourceCommit(1));
 		assertEquals(1, lines.getSourceLine(1));
 
 		assertEquals(commit2, lines.getSourceCommit(2));
 		assertEquals(2, lines.getSourceLine(2));
 	}
 
 	@Test
 	public void testRename() throws Exception {
 		testRename("file1.txt", "file2.txt");
 	}
 
 	@Test
 	public void testRenameInSubDir() throws Exception {
 		testRename("subdir/file1.txt", "subdir/file2.txt");
 	}
 
 	@Test
 	public void testMoveToOtherDir() throws Exception {
 		testRename("subdir/file1.txt", "otherdir/file1.txt");
 	}
 
 	private void testRename(final String sourcePath, final String destPath)
 			throws Exception {
 		Git git = new Git(db);
 
 		String[] content1 = new String[] { "a", "b", "c" };
 		writeTrashFile(sourcePath, join(content1));
 		git.add().addFilepattern(sourcePath).call();
 		RevCommit commit1 = git.commit().setMessage("create file").call();
 
 		writeTrashFile(destPath, join(content1));
 		git.add().addFilepattern(destPath).call();
 		git.rm().addFilepattern(sourcePath).call();
 		git.commit().setMessage("moving file").call();
 
 		String[] content2 = new String[] { "a", "b", "c2" };
 		writeTrashFile(destPath, join(content2));
 		git.add().addFilepattern(destPath).call();
 		RevCommit commit3 = git.commit().setMessage("editing file").call();
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFollowFileRenames(true);
 		command.setFilePath(destPath);
 		BlameResult lines = command.call();
 
 		assertEquals(commit1, lines.getSourceCommit(0));
 		assertEquals(0, lines.getSourceLine(0));
 		assertEquals(sourcePath, lines.getSourcePath(0));
 
 		assertEquals(commit1, lines.getSourceCommit(1));
 		assertEquals(1, lines.getSourceLine(1));
 		assertEquals(sourcePath, lines.getSourcePath(1));
 
 		assertEquals(commit3, lines.getSourceCommit(2));
 		assertEquals(2, lines.getSourceLine(2));
 		assertEquals(destPath, lines.getSourcePath(2));
 	}
 
 	@Test
 	public void testTwoRenames() throws Exception {
 		Git git = new Git(db);
 
 		// Commit 1: Add file.txt
 		String[] content1 = new String[] { "a" };
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit1 = git.commit().setMessage("create file").call();
 
 		// Commit 2: Rename to file1.txt
 		writeTrashFile("file1.txt", join(content1));
 		git.add().addFilepattern("file1.txt").call();
 		git.rm().addFilepattern("file.txt").call();
 		git.commit().setMessage("moving file").call();
 
 		// Commit 3: Edit file1.txt
 		String[] content2 = new String[] { "a", "b" };
 		writeTrashFile("file1.txt", join(content2));
 		git.add().addFilepattern("file1.txt").call();
 		RevCommit commit3 = git.commit().setMessage("editing file").call();
 
 		// Commit 4: Rename to file2.txt
 		writeTrashFile("file2.txt", join(content2));
 		git.add().addFilepattern("file2.txt").call();
 		git.rm().addFilepattern("file1.txt").call();
 		git.commit().setMessage("moving file again").call();
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFollowFileRenames(true);
 		command.setFilePath("file2.txt");
 		BlameResult lines = command.call();
 
 		assertEquals(commit1, lines.getSourceCommit(0));
 		assertEquals(0, lines.getSourceLine(0));
 		assertEquals("file.txt", lines.getSourcePath(0));
 
 		assertEquals(commit3, lines.getSourceCommit(1));
 		assertEquals(1, lines.getSourceLine(1));
 		assertEquals("file1.txt", lines.getSourcePath(1));
 	}
 
 	@Test
 	public void testDeleteTrailingLines() throws Exception {
 		Git git = new Git(db);
 
 		String[] content1 = new String[] { "a", "b", "c", "d" };
 		String[] content2 = new String[] { "a", "b" };
 
 		writeTrashFile("file.txt", join(content2));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit1 = git.commit().setMessage("create file").call();
 
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("edit file").call();
 
 		writeTrashFile("file.txt", join(content2));
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("edit file").call();
 
 		BlameCommand command = new BlameCommand(db);
 
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 		assertEquals(content2.length, lines.getResultContents().size());
 
 		assertEquals(commit1, lines.getSourceCommit(0));
 		assertEquals(commit1, lines.getSourceCommit(1));
 
 		assertEquals(0, lines.getSourceLine(0));
 		assertEquals(1, lines.getSourceLine(1));
 	}
 
 	@Test
 	public void testDeleteMiddleLines() throws Exception {
 		Git git = new Git(db);
 
 		String[] content1 = new String[] { "a", "b", "c", "d", "e" };
 		String[] content2 = new String[] { "a", "c", "e" };
 
 		writeTrashFile("file.txt", join(content2));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit1 = git.commit().setMessage("edit file").call();
 
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("edit file").call();
 
 		writeTrashFile("file.txt", join(content2));
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("edit file").call();
 
 		BlameCommand command = new BlameCommand(db);
 
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 		assertEquals(content2.length, lines.getResultContents().size());
 
 		assertEquals(commit1, lines.getSourceCommit(0));
 		assertEquals(0, lines.getSourceLine(0));
 
 		assertEquals(commit1, lines.getSourceCommit(1));
 		assertEquals(1, lines.getSourceLine(1));
 
 		assertEquals(commit1, lines.getSourceCommit(2));
 		assertEquals(2, lines.getSourceLine(2));
 	}
 
 	@Test
 	public void testEditAllLines() throws Exception {
 		Git git = new Git(db);
 
 		String[] content1 = new String[] { "a", "1" };
 		String[] content2 = new String[] { "b", "2" };
 
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("edit file").call();
 
 		writeTrashFile("file.txt", join(content2));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit2 = git.commit().setMessage("create file").call();
 
 		BlameCommand command = new BlameCommand(db);
 
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 		assertEquals(content2.length, lines.getResultContents().size());
 		assertEquals(commit2, lines.getSourceCommit(0));
 		assertEquals(commit2, lines.getSourceCommit(1));
 	}
 
 	@Test
 	public void testMiddleClearAllLines() throws Exception {
 		Git git = new Git(db);
 
 		String[] content1 = new String[] { "a", "b", "c" };
 
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("edit file").call();
 
 		writeTrashFile("file.txt", "");
 		git.add().addFilepattern("file.txt").call();
 		git.commit().setMessage("create file").call();
 
 		writeTrashFile("file.txt", join(content1));
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit3 = git.commit().setMessage("edit file").call();
 
 		BlameCommand command = new BlameCommand(db);
 
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 		assertEquals(content1.length, lines.getResultContents().size());
 		assertEquals(commit3, lines.getSourceCommit(0));
 		assertEquals(commit3, lines.getSourceCommit(1));
 		assertEquals(commit3, lines.getSourceCommit(2));
 	}
 
 	@Test
 	public void testCoreAutoCrlf1() throws Exception {
 		testCoreAutoCrlf(AutoCRLF.INPUT, AutoCRLF.FALSE);
 	}
 
 	@Test
 	public void testCoreAutoCrlf2() throws Exception {
 		testCoreAutoCrlf(AutoCRLF.FALSE, AutoCRLF.FALSE);
 	}
 
 	@Test
 	public void testCoreAutoCrlf3() throws Exception {
 		testCoreAutoCrlf(AutoCRLF.INPUT, AutoCRLF.INPUT);
 	}
 
 	@Test
 	public void testCoreAutoCrlf4() throws Exception {
 		testCoreAutoCrlf(AutoCRLF.FALSE, AutoCRLF.INPUT);
 	}
 
 	@Test
 	public void testCoreAutoCrlf5() throws Exception {
 		testCoreAutoCrlf(AutoCRLF.INPUT, AutoCRLF.TRUE);
 	}
 
 	private void testCoreAutoCrlf(AutoCRLF modeForCommitting,
 			AutoCRLF modeForReset) throws Exception {
 		Git git = new Git(db);
 		FileBasedConfig config = db.getConfig();
 		config.setEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
 				ConfigConstants.CONFIG_KEY_AUTOCRLF, modeForCommitting);
 		config.save();
 
 		String joinedCrlf = "a\r\nb\r\nc\r\n";
 		File trashFile = writeTrashFile("file.txt", joinedCrlf);
 		git.add().addFilepattern("file.txt").call();
 		RevCommit commit = git.commit().setMessage("create file").call();
 
 		// re-create file from the repo
 		trashFile.delete();
 		config.setEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
 				ConfigConstants.CONFIG_KEY_AUTOCRLF, modeForReset);
 		config.save();
 		git.reset().setMode(ResetType.HARD).call();
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 
 		assertEquals(3, lines.getResultContents().size());
 		assertEquals(commit, lines.getSourceCommit(0));
 		assertEquals(commit, lines.getSourceCommit(1));
 		assertEquals(commit, lines.getSourceCommit(2));
 	}
 
 	@Test
 	public void testConflictingMerge1() throws Exception {
 		Git git = new Git(db);
 
 		RevCommit base = commitFile("file.txt", join("0", "1", "2", "3", "4"),
 				"master");
 
 		git.checkout().setName("side").setCreateBranch(true)
 				.setStartPoint(base).call();
 		RevCommit side = commitFile("file.txt",
 				join("0", "1 side", "2", "3 on side", "4"), "side");
 
 		commitFile("file.txt", join("0", "1", "2"), "master");
 
 		checkoutBranch("refs/heads/master");
 		git.merge().include(side).call();
 
 		// The merge results in a conflict, which we resolve using mostly the
 		// side branch contents. Especially the "4" survives.
 		RevCommit merge = commitFile("file.txt",
 				join("0", "1 side", "2", "3 resolved", "4"), "master");
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 
 		assertEquals(5, lines.getResultContents().size());
 		assertEquals(base, lines.getSourceCommit(0));
 		assertEquals(side, lines.getSourceCommit(1));
 		assertEquals(base, lines.getSourceCommit(2));
 		assertEquals(merge, lines.getSourceCommit(3));
 		assertEquals(base, lines.getSourceCommit(4));
 	}
 
 	// this test inverts the order of the master and side commit and is
 	// otherwise identical to testConflictingMerge1
 	@Test
 	public void testConflictingMerge2() throws Exception {
 		Git git = new Git(db);
 
 		RevCommit base = commitFile("file.txt", join("0", "1", "2", "3", "4"),
 				"master");
 
 		commitFile("file.txt", join("0", "1", "2"), "master");
 
 		git.checkout().setName("side").setCreateBranch(true)
 				.setStartPoint(base).call();
 		RevCommit side = commitFile("file.txt",
 				join("0", "1 side", "2", "3 on side", "4"), "side");
 
 		checkoutBranch("refs/heads/master");
 		git.merge().include(side).call();
 
 		// The merge results in a conflict, which we resolve using mostly the
 		// side branch contents. Especially the "4" survives.
 		RevCommit merge = commitFile("file.txt",
 				join("0", "1 side", "2", "3 resolved", "4"), "master");
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFilePath("file.txt");
 		BlameResult lines = command.call();
 
 		assertEquals(5, lines.getResultContents().size());
 		assertEquals(base, lines.getSourceCommit(0));
 		assertEquals(side, lines.getSourceCommit(1));
 		assertEquals(base, lines.getSourceCommit(2));
 		assertEquals(merge, lines.getSourceCommit(3));
 		assertEquals(base, lines.getSourceCommit(4));
 	}
 
 	@Test
 	public void testWhitespaceMerge() throws Exception {
 		Git git = new Git(db);
 		RevCommit base = commitFile("file.txt", join("0", "1", "2"), "master");
 		RevCommit side = commitFile("file.txt", join("0", "1", "   2 side  "),
 				"side");
 
 		checkoutBranch("refs/heads/master");
 		git.merge().setFastForward(FastForwardMode.NO_FF).include(side).call();
 
 		// change whitespace, so the merge content is not identical to side, but
 		// is the same when ignoring whitespace
 		writeTrashFile("file.txt", join("0", "1", "2 side"));
 		RevCommit merge = git.commit().setAll(true).setMessage("merge")
 				.setAmend(true)
 				.call();
 
 		BlameCommand command = new BlameCommand(db);
 		command.setFilePath("file.txt")
 				.setTextComparator(RawTextComparator.WS_IGNORE_ALL)
 				.setStartCommit(merge.getId());
 		BlameResult lines = command.call();
 
 		assertEquals(3, lines.getResultContents().size());
 		assertEquals(base, lines.getSourceCommit(0));
 		assertEquals(base, lines.getSourceCommit(1));
 		assertEquals(side, lines.getSourceCommit(2));
 	}
 }