ClassTypeBuilder classTypeBuilder = new ClassTypeBuilder(className + Consts.TEST_SUFFIX);
List<Comment> existComments = testCU.getComments();
compilationUnitBuilder.addComments(existComments);
PackageDeclaration existPackageDeclaration = testCU.getPackage();
compilationUnitBuilder.addPackage(existPackageDeclaration);
//process import
List<ImportDeclaration> existImports = testCU.getImports();
compilationUnitBuilder.addImports(existImports);
//process methods
for (MethodDeclaration methodDeclaration : methodDeclarations) {