org.eclipse.jgit.test/tst/org/eclipse/jgit/attributes/AttributesHandlerTest.java - sop/jgit - Git at Google

 /*
  * 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.attributes;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;

 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;

 import org.eclipse.jgit.junit.RepositoryTestCase;
 import org.eclipse.jgit.lib.ConfigConstants;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.storage.file.FileBasedConfig;
 import org.eclipse.jgit.treewalk.FileTreeIterator;
 import org.eclipse.jgit.treewalk.TreeWalk;
 import org.junit.Test;

 /**
  * Tests {@link AttributesHandler}
  */
 public class AttributesHandlerTest extends RepositoryTestCase {
 	private static final FileMode D = FileMode.TREE;

 	private static final FileMode F = FileMode.REGULAR_FILE;

 	private TreeWalk walk;

 	@Test
 	public void testExpandNonMacro1() throws Exception {
 		setupRepo(null, null, null, "*.txt text");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("text"));
 		endWalk();
 	}

 	@Test
 	public void testExpandNonMacro2() throws Exception {
 		setupRepo(null, null, null, "*.txt -text");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("-text"));
 		endWalk();
 	}

 	@Test
 	public void testExpandNonMacro3() throws Exception {
 		setupRepo(null, null, null, "*.txt !text");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs(""));
 		endWalk();
 	}

 	@Test
 	public void testExpandNonMacro4() throws Exception {
 		setupRepo(null, null, null, "*.txt text=auto");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("text=auto"));
 		endWalk();
 	}

 	@Test
 	public void testExpandBuiltInMacro1() throws Exception {
 		setupRepo(null, null, null, "*.txt binary");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("binary -diff -merge -text"));
 		endWalk();
 	}

 	@Test
 	public void testExpandBuiltInMacro2() throws Exception {
 		setupRepo(null, null, null, "*.txt -binary");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("-binary diff merge text"));
 		endWalk();
 	}

 	@Test
 	public void testExpandBuiltInMacro3() throws Exception {
 		setupRepo(null, null, null, "*.txt !binary");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs(""));
 		endWalk();
 	}

 	@Test
 	public void testCustomGlobalMacro1() throws Exception {
 		setupRepo(
 				"[attr]foo a -b !c d=e", null, null, "*.txt foo");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo a -b d=e"));
 		endWalk();
 	}

 	@Test
 	public void testCustomGlobalMacro2() throws Exception {
 		setupRepo("[attr]foo a -b !c d=e", null, null, "*.txt -foo");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("-foo -a b d=e"));
 		endWalk();
 	}

 	@Test
 	public void testCustomGlobalMacro3() throws Exception {
 		setupRepo("[attr]foo a -b !c d=e", null, null, "*.txt !foo");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs(""));
 		endWalk();
 	}

 	@Test
 	public void testCustomGlobalMacro4() throws Exception {
 		setupRepo("[attr]foo a -b !c d=e", null, null, "*.txt foo=bar");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo=bar a -b d=bar"));
 		endWalk();
 	}

 	@Test
 	public void testInfoOverridesGlobal() throws Exception {
 		setupRepo("[attr]foo bar1",
 				"[attr]foo bar2", null, "*.txt foo");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo bar2"));
 		endWalk();
 	}

 	@Test
 	public void testWorkDirRootOverridesGlobal() throws Exception {
 		setupRepo("[attr]foo bar1",
 				null,
 				"[attr]foo bar3", "*.txt foo");

 		walk = beginWalk();
 		assertIteration(F, ".gitattributes");
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo bar3"));
 		endWalk();
 	}

 	@Test
 	public void testInfoOverridesWorkDirRoot() throws Exception {
 		setupRepo("[attr]foo bar1",
 				"[attr]foo bar2", "[attr]foo bar3", "*.txt foo");

 		walk = beginWalk();
 		assertIteration(F, ".gitattributes");
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo bar2"));
 		endWalk();
 	}

 	@Test
 	public void testRecursiveMacro() throws Exception {
 		setupRepo(
 				"[attr]foo x bar -foo",
 				null, null, "*.txt foo");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo x bar"));
 		endWalk();
 	}

 	@Test
 	public void testCyclicMacros() throws Exception {
 		setupRepo(
 				"[attr]foo x -bar\n[attr]bar y -foo", null, null, "*.txt foo");

 		walk = beginWalk();
 		assertIteration(D, "sub");
 		assertIteration(F, "sub/.gitattributes");
 		assertIteration(F, "sub/a.txt", attrs("foo x -bar -y"));
 		endWalk();
 	}

 	@Test
 	public void testRelativePaths() throws Exception {
 		setupRepo("sub/ global", "sub/** init",
 				"sub/** top_sub\n*.txt top",
 				"sub/** subsub\nsub/ subsub2\n*.txt foo");
 		// The last two sub/** and sub/ rules are in sub/.gitattributes. They
 		// must not apply to any of the files here. They would match for a
 		// further subdirectory sub/sub.
 		walk = beginWalk();
 		assertIteration(F, ".gitattributes");
 		assertIteration(D, "sub", attrs("global"));
 		assertIteration(F, "sub/.gitattributes", attrs("init top_sub global"));
 		assertIteration(F, "sub/a.txt", attrs("init foo top top_sub global"));
 		endWalk();
 		// All right, let's see that they *do* apply in sub/sub:
 		writeTrashFile("sub/sub/b.txt", "b");
 		walk = beginWalk();
 		assertIteration(F, ".gitattributes");
 		assertIteration(D, "sub", attrs("global"));
 		assertIteration(F, "sub/.gitattributes", attrs("init top_sub global"));
 		assertIteration(F, "sub/a.txt", attrs("init foo top top_sub global"));
 		assertIteration(D, "sub/sub", attrs("init subsub2 top_sub global"));
 		assertIteration(F, "sub/sub/b.txt",
 				attrs("init foo subsub2 subsub top top_sub global"));
 		endWalk();
 	}

 	private static Collection<Attribute> attrs(String s) {
 		return new AttributesRule("*", s).getAttributes();
 	}

 	private void assertIteration(FileMode type, String pathName)
 			throws IOException {
 		assertIteration(type, pathName, Collections.<Attribute> emptyList());
 	}

 	private void assertIteration(FileMode type, String pathName,
 			Collection<Attribute> expectedAttrs) throws IOException {
 		assertTrue("walk has entry", walk.next());
 		assertEquals(pathName, walk.getPathString());
 		assertEquals(type, walk.getFileMode(0));

 		if (expectedAttrs != null) {
 			assertEquals(new ArrayList<>(expectedAttrs),
 					new ArrayList<>(walk.getAttributes().getAll()));
 		}

 		if (D.equals(type))
 			walk.enterSubtree();
 	}

 	/**
 	 * @param globalAttributesContent
 	 * @param infoAttributesContent
 	 * @param rootAttributesContent
 	 * @param subDirAttributesContent
 	 * @throws Exception
 	 *             Setup a repo with .gitattributes files and a test file
 	 *             sub/a.txt
 	 */
 	private void setupRepo(
 			String globalAttributesContent,
 			String infoAttributesContent, String rootAttributesContent, String subDirAttributesContent)
 					throws Exception {
 		FileBasedConfig config = db.getConfig();
 		if (globalAttributesContent != null) {
 			File f = new File(db.getDirectory(), "global/attributes");
 			write(f, globalAttributesContent);
 			config.setString(ConfigConstants.CONFIG_CORE_SECTION, null,
 					ConfigConstants.CONFIG_KEY_ATTRIBUTESFILE,
 					f.getAbsolutePath());

 		}
 		if (infoAttributesContent != null) {
 			File f = new File(db.getDirectory(), Constants.INFO_ATTRIBUTES);
 			write(f, infoAttributesContent);
 		}
 		config.save();

 		if (rootAttributesContent != null) {
 			writeAttributesFile(Constants.DOT_GIT_ATTRIBUTES,
 					rootAttributesContent);
 		}

 		if (subDirAttributesContent != null) {
 			writeAttributesFile("sub/" + Constants.DOT_GIT_ATTRIBUTES,
 					subDirAttributesContent);
 		}

 		writeTrashFile("sub/a.txt", "a");
 	}

 	private void writeAttributesFile(String name, String... rules)
 			throws IOException {
 		StringBuilder data = new StringBuilder();
 		for (String line : rules)
 			data.append(line + "\n");
 		writeTrashFile(name, data.toString());
 	}

 	private TreeWalk beginWalk() {
 		TreeWalk newWalk = new TreeWalk(db);
 		newWalk.addTree(new FileTreeIterator(db));
 		return newWalk;
 	}

 	private void endWalk() throws IOException {
 		assertFalse("Not all files tested", walk.next());
 	}
 }
	/*
	* 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.attributes;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertTrue;

	import java.io.File;
	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;

	import org.eclipse.jgit.junit.RepositoryTestCase;
	import org.eclipse.jgit.lib.ConfigConstants;
	import org.eclipse.jgit.lib.Constants;
	import org.eclipse.jgit.lib.FileMode;
	import org.eclipse.jgit.storage.file.FileBasedConfig;
	import org.eclipse.jgit.treewalk.FileTreeIterator;
	import org.eclipse.jgit.treewalk.TreeWalk;
	import org.junit.Test;

	/**
	* Tests {@link AttributesHandler}
	*/
	public class AttributesHandlerTest extends RepositoryTestCase {
	private static final FileMode D = FileMode.TREE;

	private static final FileMode F = FileMode.REGULAR_FILE;

	private TreeWalk walk;

	@Test
	public void testExpandNonMacro1() throws Exception {
	setupRepo(null, null, null, "*.txt text");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("text"));
	endWalk();
	}

	@Test
	public void testExpandNonMacro2() throws Exception {
	setupRepo(null, null, null, "*.txt -text");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("-text"));
	endWalk();
	}

	@Test
	public void testExpandNonMacro3() throws Exception {
	setupRepo(null, null, null, "*.txt !text");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs(""));
	endWalk();
	}

	@Test
	public void testExpandNonMacro4() throws Exception {
	setupRepo(null, null, null, "*.txt text=auto");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("text=auto"));
	endWalk();
	}

	@Test
	public void testExpandBuiltInMacro1() throws Exception {
	setupRepo(null, null, null, "*.txt binary");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("binary -diff -merge -text"));
	endWalk();
	}

	@Test
	public void testExpandBuiltInMacro2() throws Exception {
	setupRepo(null, null, null, "*.txt -binary");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("-binary diff merge text"));
	endWalk();
	}

	@Test
	public void testExpandBuiltInMacro3() throws Exception {
	setupRepo(null, null, null, "*.txt !binary");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs(""));
	endWalk();
	}

	@Test
	public void testCustomGlobalMacro1() throws Exception {
	setupRepo(
	"[attr]foo a -b !c d=e", null, null, "*.txt foo");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo a -b d=e"));
	endWalk();
	}

	@Test
	public void testCustomGlobalMacro2() throws Exception {
	setupRepo("[attr]foo a -b !c d=e", null, null, "*.txt -foo");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("-foo -a b d=e"));
	endWalk();
	}

	@Test
	public void testCustomGlobalMacro3() throws Exception {
	setupRepo("[attr]foo a -b !c d=e", null, null, "*.txt !foo");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs(""));
	endWalk();
	}

	@Test
	public void testCustomGlobalMacro4() throws Exception {
	setupRepo("[attr]foo a -b !c d=e", null, null, "*.txt foo=bar");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo=bar a -b d=bar"));
	endWalk();
	}

	@Test
	public void testInfoOverridesGlobal() throws Exception {
	setupRepo("[attr]foo bar1",
	"[attr]foo bar2", null, "*.txt foo");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo bar2"));
	endWalk();
	}

	@Test
	public void testWorkDirRootOverridesGlobal() throws Exception {
	setupRepo("[attr]foo bar1",
	null,
	"[attr]foo bar3", "*.txt foo");

	walk = beginWalk();
	assertIteration(F, ".gitattributes");
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo bar3"));
	endWalk();
	}

	@Test
	public void testInfoOverridesWorkDirRoot() throws Exception {
	setupRepo("[attr]foo bar1",
	"[attr]foo bar2", "[attr]foo bar3", "*.txt foo");

	walk = beginWalk();
	assertIteration(F, ".gitattributes");
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo bar2"));
	endWalk();
	}

	@Test
	public void testRecursiveMacro() throws Exception {
	setupRepo(
	"[attr]foo x bar -foo",
	null, null, "*.txt foo");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo x bar"));
	endWalk();
	}

	@Test
	public void testCyclicMacros() throws Exception {
	setupRepo(
	"[attr]foo x -bar\n[attr]bar y -foo", null, null, "*.txt foo");

	walk = beginWalk();
	assertIteration(D, "sub");
	assertIteration(F, "sub/.gitattributes");
	assertIteration(F, "sub/a.txt", attrs("foo x -bar -y"));
	endWalk();
	}

	@Test
	public void testRelativePaths() throws Exception {
	setupRepo("sub/ global", "sub/** init",
	"sub/** top_sub\n*.txt top",
	"sub/** subsub\nsub/ subsub2\n*.txt foo");
	// The last two sub/** and sub/ rules are in sub/.gitattributes. They
	// must not apply to any of the files here. They would match for a
	// further subdirectory sub/sub.
	walk = beginWalk();
	assertIteration(F, ".gitattributes");
	assertIteration(D, "sub", attrs("global"));
	assertIteration(F, "sub/.gitattributes", attrs("init top_sub global"));
	assertIteration(F, "sub/a.txt", attrs("init foo top top_sub global"));
	endWalk();
	// All right, let's see that they do apply in sub/sub:
	writeTrashFile("sub/sub/b.txt", "b");
	walk = beginWalk();
	assertIteration(F, ".gitattributes");
	assertIteration(D, "sub", attrs("global"));
	assertIteration(F, "sub/.gitattributes", attrs("init top_sub global"));
	assertIteration(F, "sub/a.txt", attrs("init foo top top_sub global"));
	assertIteration(D, "sub/sub", attrs("init subsub2 top_sub global"));
	assertIteration(F, "sub/sub/b.txt",
	attrs("init foo subsub2 subsub top top_sub global"));
	endWalk();
	}

	private static Collection<Attribute> attrs(String s) {
	return new AttributesRule("*", s).getAttributes();
	}

	private void assertIteration(FileMode type, String pathName)
	throws IOException {
	assertIteration(type, pathName, Collections.<Attribute> emptyList());
	}

	private void assertIteration(FileMode type, String pathName,
	Collection<Attribute> expectedAttrs) throws IOException {
	assertTrue("walk has entry", walk.next());
	assertEquals(pathName, walk.getPathString());
	assertEquals(type, walk.getFileMode(0));

	if (expectedAttrs != null) {
	assertEquals(new ArrayList<>(expectedAttrs),
	new ArrayList<>(walk.getAttributes().getAll()));
	}

	if (D.equals(type))
	walk.enterSubtree();
	}

	/**
	* @param globalAttributesContent
	* @param infoAttributesContent
	* @param rootAttributesContent
	* @param subDirAttributesContent
	* @throws Exception
	* Setup a repo with .gitattributes files and a test file
	* sub/a.txt
	*/
	private void setupRepo(
	String globalAttributesContent,
	String infoAttributesContent, String rootAttributesContent, String subDirAttributesContent)
	throws Exception {
	FileBasedConfig config = db.getConfig();
	if (globalAttributesContent != null) {
	File f = new File(db.getDirectory(), "global/attributes");
	write(f, globalAttributesContent);
	config.setString(ConfigConstants.CONFIG_CORE_SECTION, null,
	ConfigConstants.CONFIG_KEY_ATTRIBUTESFILE,
	f.getAbsolutePath());

	}
	if (infoAttributesContent != null) {
	File f = new File(db.getDirectory(), Constants.INFO_ATTRIBUTES);
	write(f, infoAttributesContent);
	}
	config.save();

	if (rootAttributesContent != null) {
	writeAttributesFile(Constants.DOT_GIT_ATTRIBUTES,
	rootAttributesContent);
	}

	if (subDirAttributesContent != null) {
	writeAttributesFile("sub/" + Constants.DOT_GIT_ATTRIBUTES,
	subDirAttributesContent);
	}

	writeTrashFile("sub/a.txt", "a");
	}

	private void writeAttributesFile(String name, String... rules)
	throws IOException {
	StringBuilder data = new StringBuilder();
	for (String line : rules)
	data.append(line + "\n");
	writeTrashFile(name, data.toString());
	}

	private TreeWalk beginWalk() {
	TreeWalk newWalk = new TreeWalk(db);
	newWalk.addTree(new FileTreeIterator(db));
	return newWalk;
	}

	private void endWalk() throws IOException {
	assertFalse("Not all files tested", walk.next());
	}
	}