Program: 12024
Project: 12024
Buggy source:
public void run(IAction action){
  if (store == null) {
    store=Activator.getDefault().getPreferenceStore();
  }
  PreferenceLoader pref=new PreferenceLoader(store);
  PropertiesLoader props=new PropertiesLoader(store.getString(Preference.lang));
  try {
    IWorkspaceRoot workspaceRoot=ResourcesPlugin.getWorkspace().getRoot();
    String projectName=null;
    StructuredSelection structuredSelection=null;
    if (selection instanceof StructuredSelection) {
      structuredSelection=(StructuredSelection)selection;
    }
    if (structuredSelection != null && structuredSelection.size() == 0) {
      MessageDialog.openWarning(new Shell(),props.get(Dialog.Common.title),props.get(Dialog.Common.required));
    }
 else     if (structuredSelection != null && structuredSelection.size() > 1) {
      MessageDialog.openWarning(new Shell(),props.get(Dialog.Common.title),props.get(Dialog.Common.selectOneOnly));
    }
 else {
      String pathFromProjectRoot=ResourcePathUtil.getPathStartsFromProjectRoot(structuredSelection);
      String[] dirArrFromProjectRoot=pathFromProjectRoot.split(StrConst.dirSep);
      String selected=StrConst.empty;
      int allDirLen=dirArrFromProjectRoot.length - 1;
      for (int i=2; i < allDirLen; i++)       selected+=dirArrFromProjectRoot[i] + StrConst.dirSep;
      selected+=dirArrFromProjectRoot[allDirLen].replace(StrConst.suffixOfTestcase + StrConst.javaFileExp,StrConst.javaFileExp);
      projectName=dirArrFromProjectRoot[1];
      String projectRootPath=workspaceRoot.getLocation() + StrConst.dirSep + projectName+ StrConst.dirSep;
      if (!selected.matches("String_Node_Str" + RegExp.javaFileExp + "String_Node_Str")) {
        MessageDialog.openWarning(new Shell(),props.get(Dialog.Common.title),props.get(Dialog.Common.selectJavaFile));
      }
 else {
        String testTargetResource=selected.replace(pref.commonTestMainJavaDir,pref.commonSrcMainJavaDir);
        String testTargetPath=projectRootPath + selected.replace(pref.commonTestMainJavaDir,pref.commonSrcMainJavaDir);
        File outputFile=new File(testTargetPath);
        if (outputFile.exists()) {
          int retryCount=0;
          IEditorPart editorPart=null;
          while (true) {
            try {
              IProject project=workspaceRoot.getProject(projectName);
              IFile testCaseFile=project.getFile(testTargetResource);
              String editorId=IDE.getEditorDescriptor(testCaseFile.getName()).getId();
              IWorkbenchPage page=PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
              editorPart=IDE.openEditor(page,testCaseFile,editorId);
              editorPart.setFocus();
            }
 catch (            Exception e) {
              e.printStackTrace();
              retryCount++;
              if (retryCount > 10)               break;
              ThreadUtil.sleep(1500);
            }
            break;
          }
        }
      }
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
}

Fixed version (ground truth):
public void run(IAction action){
  if (store == null) {
    store=Activator.getDefault().getPreferenceStore();
  }
  PreferenceLoader pref=new PreferenceLoader(store);
  PropertiesLoader props=new PropertiesLoader(store.getString(Preference.lang));
  try {
    IWorkspaceRoot workspaceRoot=ResourcesPlugin.getWorkspace().getRoot();
    String projectName=null;
    StructuredSelection structuredSelection=null;
    if (selection instanceof StructuredSelection) {
      structuredSelection=(StructuredSelection)selection;
    }
    if (structuredSelection != null && structuredSelection.size() == 0) {
      MessageDialog.openWarning(new Shell(),props.get(Dialog.Common.title),props.get(Dialog.Common.required));
    }
 else     if (structuredSelection != null && structuredSelection.size() > 1) {
      MessageDialog.openWarning(new Shell(),props.get(Dialog.Common.title),props.get(Dialog.Common.selectOneOnly));
    }
 else {
      String pathFromProjectRoot=ResourcePathUtil.getPathStartsFromProjectRoot(structuredSelection);
      String[] dirArrFromProjectRoot=pathFromProjectRoot.split(StrConst.dirSep);
      String selected=StrConst.empty;
      int allDirLen=dirArrFromProjectRoot.length - 1;
      for (int i=2; i < allDirLen; i++)       selected+=dirArrFromProjectRoot[i] + StrConst.dirSep;
      selected+=dirArrFromProjectRoot[allDirLen].replace(StrConst.suffixOfTestcase + StrConst.javaFileExp,StrConst.javaFileExp);
      projectName=dirArrFromProjectRoot[1];
      String projectRootPath=workspaceRoot.getLocation() + StrConst.dirSep + projectName+ StrConst.dirSep;
      if (!selected.matches("String_Node_Str" + RegExp.javaFileExp + "String_Node_Str")) {
        MessageDialog.openWarning(new Shell(),props.get(Dialog.Common.title),props.get(Dialog.Common.selectJavaFile));
      }
 else {
        String testTargetResource=selected.replaceFirst(pref.commonTestMainJavaDir,pref.commonSrcMainJavaDir);
        String testTargetPath=projectRootPath + selected.replaceFirst(pref.commonTestMainJavaDir,pref.commonSrcMainJavaDir);
        File outputFile=new File(testTargetPath);
        if (outputFile.exists()) {
          int retryCount=0;
          IEditorPart editorPart=null;
          while (true) {
            try {
              IProject project=workspaceRoot.getProject(projectName);
              IFile testCaseFile=project.getFile(testTargetResource);
              String editorId=IDE.getEditorDescriptor(testCaseFile.getName()).getId();
              IWorkbenchPage page=PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
              editorPart=IDE.openEditor(page,testCaseFile,editorId);
              editorPart.setFocus();
            }
 catch (            Exception e) {
              e.printStackTrace();
              retryCount++;
              if (retryCount > 10)               break;
              ThreadUtil.sleep(1500);
            }
            break;
          }
        }
      }
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
}