diff --git a/MANIFEST.in b/MANIFEST.in
index 84c29b7..c4b5962 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,5 @@
-include *.py *.md
-recursive-include namekoplus/chassis *.py
-recursive-include namekoplus/templates *.py *.yml
-recursive-include namekoplus/chassis-agent *.py *.yml
\ No newline at end of file
+include *.py *.md *.mako
+recursive-include namekoplus/chassis *.py *.mako
+recursive-include namekoplus/templates *.py *.yml *.mako
+recursive-include namekoplus/chassis-agent *.py *.yml *.mako
+recursive-include namekoplus/tests *.py *.mako
\ No newline at end of file
diff --git a/namekoplus/command.py b/namekoplus/command.py
index de238b4..012be9f 100644
--- a/namekoplus/command.py
+++ b/namekoplus/command.py
@@ -7,6 +7,9 @@ from python_on_whales import DockerException, ClientNotFoundError, DockerClient,
 
 
 def check_docker():
+    """
+    Check if docker and docker compose are installed and running.
+    """
     try:
         docker_testing.ps()
     except ClientNotFoundError:
@@ -23,6 +26,9 @@ def check_docker():
 
 @contextmanager
 def status(status_msg: str, newline: bool = False, quiet: bool = False):
+    """
+    Show status message and yield.
+    """
     msg_suffix = ' ...' if not newline else ' ...\n'
     click.echo(status_msg + msg_suffix)
     try:
@@ -36,24 +42,25 @@ def status(status_msg: str, newline: bool = False, quiet: bool = False):
             click.echo('  Done\n')
 
 
-def get_template_directory() -> str:
+def get_directory(dir_name: str) -> str:
     """
-    Return the directory where nameko_plus setup templates are found.
+    Return the directory path of the given nameko-plus directory name.
     """
     import namekoplus
 
     package_dir = os.path.abspath(os.path.dirname(namekoplus.__file__))
-    return os.path.join(package_dir, 'templates')
+    return os.path.join(package_dir, dir_name)
 
 
-def get_agent_directory() -> str:
-    """
-    Return the directory where nameko_plus setup agent are found.
-    """
-    import namekoplus
+def copy_files(src_dir, dest_dir):
+    for file_ in os.listdir(src_dir):
+        if file_ == '__pycache__':
+            continue
 
-    package_dir = os.path.abspath(os.path.dirname(namekoplus.__file__))
-    return os.path.join(package_dir, 'chassis-agent')
+        src_file_path = os.path.join(src_dir, file_)
+        output_file = os.path.join(dest_dir, file_)
+        with status(f'Generating {os.path.abspath(output_file)}'):
+            shutil.copy(src_file_path, output_file)
 
 
 @click.group()
@@ -78,24 +85,16 @@ def init(directory, _type):
         click.echo('Directory {} already exists and is not empty'.format(directory), err=True)
         return
 
-    template_dir = os.path.join(get_template_directory(), _type)
+    template_dir = os.path.join(get_directory('templates'), _type)
     if not os.access(template_dir, os.F_OK):
         click.echo('No such template type {}'.format(_type), err=True)
         return
 
-    # 创建目录
     if not os.access(directory, os.F_OK):
         with status(f'Creating directory {os.path.abspath(directory)!r}'):
             os.makedirs(directory)
 
-    # 把 templates 放入新建的目录
-    for file_ in os.listdir(template_dir):
-        if file_ == '__pycache__':
-            continue
-        src_file_path = os.path.join(template_dir, file_)
-        output_file = os.path.join(directory, file_)
-        with status(f'Generating {os.path.abspath(output_file)}'):
-            shutil.copy(src_file_path, output_file)
+    copy_files(template_dir, directory)
 
 
 @cli.command()
@@ -119,7 +118,7 @@ def start(middleware, user, password):
         os.environ['RABBITMQ_DEFAULT_USER'] = user
         os.environ['RABBITMQ_DEFAULT_PASS'] = password
 
-    docker_compose_file_dir = os.path.join(get_agent_directory(), middleware)
+    docker_compose_file_dir = os.path.join(get_directory('chassis-agent'), middleware)
     for file_ in os.listdir(docker_compose_file_dir):
         compose_file_path = os.path.join(docker_compose_file_dir, file_)
         with status(f'Starting {middleware}'):
@@ -138,7 +137,7 @@ def stop(middleware):
     """
     check_docker()
 
-    docker_compose_file_dir = os.path.join(get_agent_directory(), middleware)
+    docker_compose_file_dir = os.path.join(get_directory('chassis-agent'), middleware)
     for file_ in os.listdir(docker_compose_file_dir):
         compose_file_path = os.path.join(docker_compose_file_dir, file_)
         with status(f'Stopping {middleware}'):
@@ -146,5 +145,30 @@ def stop(middleware):
             docker.compose.down()
 
 
+@cli.command()
+@click.option('-e', '--existed_dir', 'directory',
+              required=True,
+              help='The existed directory name of the nameko service')
+@click.option('-t', '--type', '_type',
+              default='unit',
+              show_default=True,
+              type=click.Choice(['unit'], case_sensitive=False),
+              help='The test type of the nameko service')
+def test_gen(directory, _type):
+    """
+    Generate test files for nameko services.
+    """
+    if not os.access(directory, os.F_OK) or not os.listdir(directory):
+        click.echo('Directory {} dose not exist or is empty'.format(directory), err=True)
+        return
+
+    tests_dir = os.path.join(get_directory('tests'), _type)
+    if not os.access(tests_dir, os.F_OK):
+        click.echo('No such test type {}'.format(_type), err=True)
+        return
+
+    copy_files(tests_dir, directory)
+
+
 if __name__ == '__main__':
     cli()
\ No newline at end of file
diff --git a/namekoplus/tests/__init__.py b/namekoplus/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/namekoplus/tests/unit/__init__.py b/namekoplus/tests/unit/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/namekoplus/tests/unit/test_service.py b/namekoplus/tests/unit/test_service.py
new file mode 100644
index 0000000..e595e58
--- /dev/null
+++ b/namekoplus/tests/unit/test_service.py
@@ -0,0 +1,20 @@
+"""
+Service unit testing best practice.
+"""
+
+from nameko.testing.services import worker_factory
+
+
+def test_example_service():
+    """
+    Test example service.
+    """
+    # create worker with mock dependencies
+    service = worker_factory(ServiceName)  # TODO replace ServiceName with the name of the service and import it
+
+    # add side effects to the mock rpc dependency on the "remote" service
+    service.remote.hello.side_effect = lambda name: "Hello, {}!".format(name)
+
+    # test remote_hello business logic
+    assert service.remote_hello("Bryant") == "Hello, Bryant!"
+    service.remote.hello.assert_called_once_with("Bryant")
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 3cbaba3..35820a9 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ with open(path.join(here, 'README.md'), encoding='utf-8') as f:
 
 setup(
     name='namekoplus',
-    version='0.2.4',
+    version='0.3.0',
     description='A lightweight Python distributed microservice solution',
     long_description=long_description,
     long_description_content_type='text/markdown',
@@ -71,7 +71,7 @@ setup(
                   'sqlalchemy==2.0.15',
                   'sqlacodegen==2.3.0',
                   'alembic==1.11.1'],
-        'ssl': ['cryptography'],
+        'security': ['cryptography'],
         'dev': ['mako==1.2.4',
                 'environs==9.5.0']
     },