fix uwsgi --version output

Author: mr-mixas

nested_diff_restful/__init__.py

@@ -14,13 +14,17 @@
 
 """REST API and web UI for nested-diff"""
 
-__version__ = '1.0.0'
+__version__ = '1.0.1'
 __author__ = 'Michael Samoglyadov'
 __license__ = 'Apache License, Version 2.0'
 __website__ = 'https://github.com/mr-mixas/Nested-Diff-RESTful'
 
 
 def start_wsgi_server():
+    import gunicorn
+
+    gunicorn.__version__ = __version__
+
     import gunicorn.app.base
 
     import nested_diff_restful.api

tests/test_cli.py

@@ -16,3 +16,19 @@ def test_wsgi_server_entry_point(capsys):
 
     assert captured.out.startswith('usage: nested_diff_restful')
     assert captured.err == ''
+
+
+def test_wsgi_server_version(capsys):
+    with unittest.mock.patch('sys.argv', ['nested_diff_restful', '--version']):
+        with pytest.raises(SystemExit) as e:
+            nested_diff_restful.start_wsgi_server()
+
+        assert e.value.code == 0
+
+    captured = capsys.readouterr()
+
+    assert (
+        captured.out
+        == f'nested_diff_restful (version {nested_diff_restful.__version__})\n'
+    )
+    assert captured.err == ''