Create JUnit test utilities for JGit derived sources

The LocalDiskRepositoryTestCase class is derived from the current
RepositoryTestCase code and is meant for application (or our own)
tests to subclass and access temporary repositories on the local
client disk.

Change-Id: Idff096cea40a7b2b56a90fb5de179ba61ea3a0eb
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit.junit/.classpath

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

org.eclipse.jgit.junit/.gitignore

@@ -0,0 +1,2 @@
+/bin
+/target

org.eclipse.jgit.junit/.project

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.jgit.junit</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.pde.PluginNature</nature>
+	</natures>
+</projectDescription>

org.eclipse.jgit.junit/.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,6 @@
+#Sat Dec 20 21:21:24 CET 2008
+eclipse.preferences.version=1
+encoding//tst-rsrc/org/eclipse/jgit/patch/testGetText_BothISO88591.patch=ISO-8859-1
+encoding//tst-rsrc/org/eclipse/jgit/patch/testGetText_Convert.patch=ISO-8859-1
+encoding//tst-rsrc/org/eclipse/jgit/patch/testGetText_DiffCc.patch=ISO-8859-1
+encoding/<project>=UTF-8

org.eclipse.jgit.junit/.settings/org.eclipse.core.runtime.prefs

@@ -0,0 +1,3 @@
+#Mon Mar 24 18:55:56 EDT 2008
+eclipse.preferences.version=1
+line.separator=\n

org.eclipse.jgit.junit/.settings/org.eclipse.jdt.core.prefs

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+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_parameterized_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_superinterfaces=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_parameters=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_ellipsis=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_parameterized_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_parameters=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_annotation_type_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_anonymous_type_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_array_initializer=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_block=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_constructor_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_constant=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_method_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_switch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_type_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_allocation_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation_type_member_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_catch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_for=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_if=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_parenthesized_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_switch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_synchronized=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_while=insert
+org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_return=insert
+org.eclipse.jdt.core.formatter.insert_space_before_postfix_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_prefix_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_question_in_conditional=insert
+org.eclipse.jdt.core.formatter.insert_space_before_question_in_wildcard=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_for=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_unary_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_braces_in_array_initializer=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_brackets_in_array_allocation_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.lineSplit=80
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=1
+org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=true
+org.eclipse.jdt.core.formatter.tabulation.char=tab
+org.eclipse.jdt.core.formatter.tabulation.size=4
+org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false

org.eclipse.jgit.junit/.settings/org.eclipse.jdt.ui.prefs

@@ -0,0 +1,62 @@
+#Sat Oct 31 14:53:06 PDT 2009
+eclipse.preferences.version=1
+editor_save_participant_org.eclipse.jdt.ui.postsavelistener.cleanup=true
+formatter_profile=_JGit
+formatter_settings_version=10
+internal.default.compliance=default
+org.eclipse.jdt.ui.ignorelowercasenames=true
+org.eclipse.jdt.ui.importorder=java;javax;org;com;
+org.eclipse.jdt.ui.ondemandthreshold=99
+org.eclipse.jdt.ui.staticondemandthreshold=99
+org.eclipse.jdt.ui.text.custom_code_templates=<?xml version\="1.0" encoding\="UTF-8"?><templates/>
+sp_cleanup.add_default_serial_version_id=true
+sp_cleanup.add_generated_serial_version_id=false
+sp_cleanup.add_missing_annotations=false
+sp_cleanup.add_missing_deprecated_annotations=true
+sp_cleanup.add_missing_methods=false
+sp_cleanup.add_missing_nls_tags=false
+sp_cleanup.add_missing_override_annotations=true
+sp_cleanup.add_serial_version_id=false
+sp_cleanup.always_use_blocks=true
+sp_cleanup.always_use_parentheses_in_expressions=false
+sp_cleanup.always_use_this_for_non_static_field_access=false
+sp_cleanup.always_use_this_for_non_static_method_access=false
+sp_cleanup.convert_to_enhanced_for_loop=false
+sp_cleanup.correct_indentation=false
+sp_cleanup.format_source_code=false
+sp_cleanup.format_source_code_changes_only=false
+sp_cleanup.make_local_variable_final=false
+sp_cleanup.make_parameters_final=false
+sp_cleanup.make_private_fields_final=true
+sp_cleanup.make_type_abstract_if_missing_method=false
+sp_cleanup.make_variable_declarations_final=false
+sp_cleanup.never_use_blocks=false
+sp_cleanup.never_use_parentheses_in_expressions=true
+sp_cleanup.on_save_use_additional_actions=true
+sp_cleanup.organize_imports=false
+sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
+sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
+sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
+sp_cleanup.qualify_static_member_accesses_with_declaring_class=false
+sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
+sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_trailing_whitespaces=true
+sp_cleanup.remove_trailing_whitespaces_all=true
+sp_cleanup.remove_trailing_whitespaces_ignore_empty=false
+sp_cleanup.remove_unnecessary_casts=false
+sp_cleanup.remove_unnecessary_nls_tags=false
+sp_cleanup.remove_unused_imports=false
+sp_cleanup.remove_unused_local_variables=false
+sp_cleanup.remove_unused_private_fields=true
+sp_cleanup.remove_unused_private_members=false
+sp_cleanup.remove_unused_private_methods=true
+sp_cleanup.remove_unused_private_types=true
+sp_cleanup.sort_members=false
+sp_cleanup.sort_members_all=false
+sp_cleanup.use_blocks=false
+sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_parentheses_in_expressions=false
+sp_cleanup.use_this_for_non_static_field_access=false
+sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
+sp_cleanup.use_this_for_non_static_method_access=false
+sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true

org.eclipse.jgit.junit/META-INF/MANIFEST.MF

@@ -0,0 +1,27 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: %plugin_name
+Bundle-SymbolicName: org.eclipse.jgit.junit
+Bundle-Version: 0.6.0.qualifier
+Bundle-Localization: plugin
+Bundle-Vendor: %provider_name
+Bundle-ActivationPolicy: lazy
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
+Import-Package: com.jcraft.jsch,
+ junit.framework,
+ org.eclipse.jgit.diff,
+ org.eclipse.jgit.dircache,
+ org.eclipse.jgit.errors,
+ org.eclipse.jgit.fnmatch,
+ org.eclipse.jgit.lib,
+ org.eclipse.jgit.merge,
+ org.eclipse.jgit.patch,
+ org.eclipse.jgit.revplot,
+ org.eclipse.jgit.revwalk,
+ org.eclipse.jgit.revwalk.filter,
+ org.eclipse.jgit.transport,
+ org.eclipse.jgit.treewalk,
+ org.eclipse.jgit.treewalk.filter,
+ org.eclipse.jgit.util,
+ org.eclipse.jgit.util.io
+Export-Package: org.eclipse.jgit.junit;version="0.6.0"

org.eclipse.jgit.junit/build.properties

@@ -0,0 +1,5 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               plugin.properties

org.eclipse.jgit.junit/plugin.properties

@@ -0,0 +1,2 @@
+plugin_name=Java Git JUnit Utility Classes (Incubation)
+provider_name=eclipse.org

org.eclipse.jgit.junit/pom.xml

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+   Copyright (C) 2009, Google Inc.
+   Copyright (C) 2008, Imran M Yousuf <imyousuf@smartitengineering.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.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.eclipse.jgit</groupId>
+    <artifactId>jgit-parent</artifactId>
+    <version>0.6.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>org.eclipse.jgit.junit</artifactId>
+  <name>JGit - JUnit Utility Classes</name>
+
+  <description>
+    Utility classes to support JUnit testing of JGit applications.
+  </description>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.eclipse.jgit</groupId>
+      <artifactId>org.eclipse.jgit</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <sourceDirectory>src/</sourceDirectory>
+
+    <resources>
+      <resource>
+        <directory>.</directory>
+        <includes>
+          <include>plugin.properties</include>
+        </includes>
+      </resource>
+    </resources>
+
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <configuration>
+          <archive>
+            <manifestFile>META-INF/MANIFEST.MF</manifestFile>
+          </archive>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>

org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/LocalDiskRepositoryTestCase.java

@@ -0,0 +1,401 @@
+/*
+ * Copyright (C) 2009, Google Inc.
+ * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
+ * Copyright (C) 2007, Shawn O. Pearce <spearce@spearce.org>
+ * 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.junit;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import junit.framework.TestCase;
+
+import org.eclipse.jgit.lib.FileBasedConfig;
+import org.eclipse.jgit.lib.PersonIdent;
+import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.lib.RepositoryCache;
+import org.eclipse.jgit.lib.WindowCache;
+import org.eclipse.jgit.lib.WindowCacheConfig;
+import org.eclipse.jgit.util.IO;
+import org.eclipse.jgit.util.SystemReader;
+
+/**
+ * JUnit TestCase with specialized support for temporary local repository.
+ * <p>
+ * A temporary directory is created for each test, allowing each test to use a
+ * fresh environment. The temporary directory is cleaned up after the test ends.
+ * <p>
+ * Callers should not use {@link RepositoryCache} from within these tests as it
+ * may wedge file descriptors open past the end of the test.
+ * <p>
+ * A system property {@code jgit.junit.usemmap} defines whether memory mapping
+ * is used. Memory mapping has an effect on the file system, in that memory
+ * mapped files in Java cannot be deleted as long as the mapped arrays have not
+ * been reclaimed by the garbage collector. The programmer cannot control this
+ * with precision, so temporary files may hang around longer than desired during
+ * a test, or tests may fail altogether if there is insufficient file
+ * descriptors or address space for the test process.
+ */
+public abstract class LocalDiskRepositoryTestCase extends TestCase {
+	private static Thread shutdownHook;
+
+	private static int testCount;
+
+	private static final boolean useMMAP = "true".equals(System
+			.getProperty("jgit.junit.usemmap"));
+
+	/** A fake (but stable) identity for author fields in the test. */
+	protected PersonIdent author;
+
+	/** A fake (but stable) identity for committer fields in the test. */
+	protected PersonIdent committer;
+
+	private final File trash = new File(new File("target"), "trash");
+
+	private final List<Repository> toClose = new ArrayList<Repository>();
+
+	private MockSystemReader mockSystemReader;
+
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+
+		if (shutdownHook == null) {
+			shutdownHook = new Thread() {
+				@Override
+				public void run() {
+					System.gc();
+					recursiveDelete("SHUTDOWN", trash, false, false);
+				}
+			};
+			Runtime.getRuntime().addShutdownHook(shutdownHook);
+		}
+
+		recursiveDelete(testName(), trash, true, false);
+
+		mockSystemReader = new MockSystemReader();
+		mockSystemReader.userGitConfig = new FileBasedConfig(new File(trash,
+				"usergitconfig"));
+		SystemReader.setInstance(mockSystemReader);
+
+		final long now = mockSystemReader.getCurrentTime();
+		final int tz = mockSystemReader.getTimezone(now);
+		author = new PersonIdent("J. Author", "jauthor@example.com");
+		author = new PersonIdent(author, now, tz);
+
+		committer = new PersonIdent("J. Committer", "jcommitter@example.com");
+		committer = new PersonIdent(committer, now, tz);
+
+		final WindowCacheConfig c = new WindowCacheConfig();
+		c.setPackedGitLimit(128 * WindowCacheConfig.KB);
+		c.setPackedGitWindowSize(8 * WindowCacheConfig.KB);
+		c.setPackedGitMMAP(useMMAP);
+		c.setDeltaBaseCacheLimit(8 * WindowCacheConfig.KB);
+		WindowCache.reconfigure(c);
+	}
+
+	@Override
+	protected void tearDown() throws Exception {
+		RepositoryCache.clear();
+		for (Repository r : toClose)
+			r.close();
+		toClose.clear();
+
+		// Since memory mapping is controlled by the GC we need to
+		// tell it this is a good time to clean up and unlock
+		// memory mapped files.
+		//
+		if (useMMAP)
+			System.gc();
+
+		recursiveDelete(testName(), trash, false, true);
+		super.tearDown();
+	}
+
+	/** Increment the {@link #author} and {@link #committer} times. */
+	protected void tick() {
+		final long delta = TimeUnit.MILLISECONDS.convert(5 * 60,
+				TimeUnit.SECONDS);
+		final long now = author.getWhen().getTime() + delta;
+		final int tz = mockSystemReader.getTimezone(now);
+
+		author = new PersonIdent(author, now, tz);
+		committer = new PersonIdent(committer, now, tz);
+	}
+
+	/**
+	 * Recursively delete a directory, failing the test if the delete fails.
+	 *
+	 * @param dir
+	 *            the recursively directory to delete, if present.
+	 */
+	protected void recursiveDelete(final File dir) {
+		recursiveDelete(testName(), dir, false, true);
+	}
+
+	private static boolean recursiveDelete(final String testName,
+			final File dir, boolean silent, boolean failOnError) {
+		assert !(silent && failOnError);
+		if (!dir.exists()) {
+			return silent;
+		}
+		final File[] ls = dir.listFiles();
+		if (ls != null) {
+			for (int k = 0; k < ls.length; k++) {
+				final File e = ls[k];
+				if (e.isDirectory()) {
+					silent = recursiveDelete(testName, e, silent, failOnError);
+				} else {
+					if (!e.delete()) {
+						if (!silent) {
+							reportDeleteFailure(testName, failOnError, e);
+						}
+						silent = !failOnError;
+					}
+				}
+			}
+		}
+		if (!dir.delete()) {
+			if (!silent) {
+				reportDeleteFailure(testName, failOnError, dir);
+			}
+			silent = !failOnError;
+		}
+		return silent;
+	}
+
+	private static void reportDeleteFailure(final String testName,
+			final boolean failOnError, final File e) {
+		final String severity;
+		if (failOnError)
+			severity = "ERROR";
+		else
+			severity = "WARNING";
+
+		final String msg = severity + ": Failed to delete " + e + " in "
+				+ testName;
+		if (failOnError)
+			fail(msg);
+		else
+			System.err.println(msg);
+	}
+
+	/**
+	 * Creates a new empty bare repository.
+	 *
+	 * @return the newly created repository, opened for access
+	 * @throws IOException
+	 *             the repository could not be created in the temporary area
+	 */
+	protected Repository createBareRepository() throws IOException {
+		return createRepository(true /* bare */);
+	}
+
+	/**
+	 * Creates a new empty repository within a new empty working directory.
+	 *
+	 * @return the newly created repository, opened for access
+	 * @throws IOException
+	 *             the repository could not be created in the temporary area
+	 */
+	protected Repository createWorkRepository() throws IOException {
+		return createRepository(false /* not bare */);
+	}
+
+	/**
+	 * Creates a new empty repository.
+	 *
+	 * @param bare
+	 *            true to create a bare repository; false to make a repository
+	 *            within its working directory
+	 * @return the newly created repository, opened for access
+	 * @throws IOException
+	 *             the repository could not be created in the temporary area
+	 */
+	private Repository createRepository(boolean bare) throws IOException {
+		String uniqueId = System.currentTimeMillis() + "_" + (testCount++);
+		String gitdirName = "test" + uniqueId + (bare ? "" : "/") + ".git";
+		File gitdir = new File(trash, gitdirName).getCanonicalFile();
+		Repository db = new Repository(gitdir);
+
+		assertFalse(gitdir.exists());
+		db.create();
+		toClose.add(db);
+		return db;
+	}
+
+	/**
+	 * Run a hook script in the repository, returning the exit status.
+	 *
+	 * @param db
+	 *            repository the script should see in GIT_DIR environment
+	 * @param hook
+	 *            path of the hook script to execute, must be executable file
+	 *            type on this platform
+	 * @param args
+	 *            arguments to pass to the hook script
+	 * @return exit status code of the invoked hook
+	 * @throws IOException
+	 *             the hook could not be executed
+	 * @throws InterruptedException
+	 *             the caller was interrupted before the hook completed
+	 */
+	protected int runHook(final Repository db, final File hook,
+			final String... args) throws IOException, InterruptedException {
+		final String[] argv = new String[1 + args.length];
+		argv[0] = hook.getAbsolutePath();
+		System.arraycopy(args, 0, argv, 1, args.length);
+
+		final Map<String, String> env = cloneEnv();
+		env.put("GIT_DIR", db.getDirectory().getAbsolutePath());
+		putPersonIdent(env, "AUTHOR", author);
+		putPersonIdent(env, "COMMITTER", committer);
+
+		final File cwd = db.getWorkDir();
+		final Process p = Runtime.getRuntime().exec(argv, toEnvArray(env), cwd);
+		p.getOutputStream().close();
+		p.getErrorStream().close();
+		p.getInputStream().close();
+		return p.waitFor();
+	}
+
+	private static void putPersonIdent(final Map<String, String> env,
+			final String type, final PersonIdent who) {
+		final String ident = who.toExternalString();
+		final String date = ident.substring(ident.indexOf("> ") + 2);
+		env.put("GIT_" + type + "_NAME", who.getName());
+		env.put("GIT_" + type + "_EMAIL", who.getEmailAddress());
+		env.put("GIT_" + type + "_DATE", date);
+	}
+
+	/**
+	 * Create a string to a UTF-8 temporary file and return the path.
+	 *
+	 * @param body
+	 *            complete content to write to the file. If the file should end
+	 *            with a trailing LF, the string should end with an LF.
+	 * @return path of the temporary file created within the trash area.
+	 * @throws IOException
+	 *             the file could not be written.
+	 */
+	protected File write(final String body) throws IOException {
+		final File f = File.createTempFile("temp", "txt", trash);
+		try {
+			write(f, body);
+			return f;
+		} catch (Error e) {
+			f.delete();
+			throw e;
+		} catch (RuntimeException e) {
+			f.delete();
+			throw e;
+		} catch (IOException e) {
+			f.delete();
+			throw e;
+		}
+	}
+
+	/**
+	 * Write a string as a UTF-8 file.
+	 *
+	 * @param f
+	 *            file to write the string to. Caller is responsible for making
+	 *            sure it is in the trash directory or will otherwise be cleaned
+	 *            up at the end of the test. If the parent directory does not
+	 *            exist, the missing parent directories are automatically
+	 *            created.
+	 * @param body
+	 *            content to write to the file.
+	 * @throws IOException
+	 *             the file could not be written.
+	 */
+	protected void write(final File f, final String body) throws IOException {
+		f.getParentFile().mkdirs();
+		Writer w = new OutputStreamWriter(new FileOutputStream(f), "UTF-8");
+		try {
+			w.write(body);
+		} finally {
+			w.close();
+		}
+	}
+
+	/**
+	 * Fully read a UTF-8 file and return as a string.
+	 *
+	 * @param f
+	 *            file to read the content of.
+	 * @return UTF-8 decoded content of the file, empty string if the file
+	 *         exists but has no content.
+	 * @throws IOException
+	 *             the file does not exist, or could not be read.
+	 */
+	protected String read(final File f) throws IOException {
+		final byte[] body = IO.readFully(f);
+		return new String(body, 0, body.length, "UTF-8");
+	}
+
+	private static String[] toEnvArray(final Map<String, String> env) {
+		final String[] envp = new String[env.size()];
+		int i = 0;
+		for (Map.Entry<String, String> e : env.entrySet()) {
+			envp[i++] = e.getKey() + "=" + e.getValue();
+		}
+		return envp;
+	}
+
+	private static HashMap<String, String> cloneEnv() {
+		return new HashMap<String, String>(System.getenv());
+	}
+
+	private String testName() {
+		return getClass().getName() + "." + getName();
+	}
+}

org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/MockSystemReader.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2009, Google Inc.
+ * Copyright (C) 2009, Yann Simon <yann.simon.fr@gmail.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.junit;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.TimeZone;
+
+import org.eclipse.jgit.lib.Constants;
+import org.eclipse.jgit.lib.FileBasedConfig;
+import org.eclipse.jgit.util.SystemReader;
+
+public class MockSystemReader extends SystemReader {
+	final Map<String, String> values = new HashMap<String, String>();
+
+	FileBasedConfig userGitConfig;
+
+	public MockSystemReader() {
+		init(Constants.OS_USER_NAME_KEY);
+		init(Constants.GIT_AUTHOR_NAME_KEY);
+		init(Constants.GIT_AUTHOR_EMAIL_KEY);
+		init(Constants.GIT_COMMITTER_NAME_KEY);
+		init(Constants.GIT_COMMITTER_EMAIL_KEY);
+		userGitConfig = new FileBasedConfig(null);
+	}
+
+	private void init(final String n) {
+		setProperty(n, n);
+	}
+
+	public void clearProperties() {
+		values.clear();
+	}
+
+	public void setProperty(String key, String value) {
+		values.put(key, value);
+	}
+
+	@Override
+	public String getenv(String variable) {
+		return values.get(variable);
+	}
+
+	@Override
+	public String getProperty(String key) {
+		return values.get(key);
+	}
+
+	@Override
+	public FileBasedConfig openUserConfig() {
+		return userGitConfig;
+	}
+
+	@Override
+	public String getHostname() {
+		return "fake.host.example.com";
+	}
+
+	@Override
+	public long getCurrentTime() {
+		return 1250379778668L; // Sat Aug 15 20:12:58 GMT-03:30 2009
+	}
+
+	@Override
+	public int getTimezone(long when) {
+		return TimeZone.getTimeZone("GMT-03:30").getOffset(when) / (60 * 1000);
+	}
+}

pom.xml

@@ -208,6 +208,12 @@
         <version>${project.version}</version>
       </dependency>
 
+      <dependency>
+        <groupId>org.eclipse.jgit</groupId>
+        <artifactId>org.eclipse.jgit.junit</artifactId>
+        <version>${project.version}</version>
+      </dependency>
+
       <dependency>
         <groupId>org.eclipse.jgit</groupId>
         <artifactId>org.eclipse.jgit.ui</artifactId>
@@ -229,6 +235,7 @@
     <module>org.eclipse.jgit</module>
     <module>org.eclipse.jgit.ui</module>
     <module>org.eclipse.jgit.pgm</module>
+    <module>org.eclipse.jgit.junit</module>
     <module>org.eclipse.jgit.test</module>
   </modules>
 </project>