[git tests] setup username

Only in GitBranchWorkerTest for now.

plugins/git4idea/tests/git4idea/branch/GitBranchWorkerTest.groovy

@@ -45,6 +45,7 @@ import static junit.framework.Assert.*
  */
 @Mixin(GitExecutor)
 @Mixin(GitScenarios)
+@Mixin(GitLightTest)
 class GitBranchWorkerTest {
 
   private String myRootDir
@@ -103,6 +104,7 @@ class GitBranchWorkerTest {
   private void initRepo(String repoRoot) {
     cd repoRoot
     git("init")
+    setupUsername();
     touch("file.txt")
     git("add file.txt")
     git("commit -m initial")

plugins/git4idea/tests/git4idea/test/GitLightTest.groovy

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2000-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package git4idea.test
+
+/**
+ *
+ * @author Kirill Likhodedov
+ */
+@Mixin(GitExecutor)
+class GitLightTest {
+
+  public static final String USER_NAME = "John Doe";
+  public static final String USER_EMAIL = "John.Doe@example.com";
+
+  public void setupUsername() {
+    git("config user.name $USER_NAME")
+    git("config user.email $USER_EMAIL")
+  }
+
+}