Added Mock server fixture and initial test

tests/conftest.py

@@ -0,0 +1,36 @@
+from http.server import BaseHTTPRequestHandler, HTTPServer
+import socket
+from threading import Thread
+
+import pytest
+import requests
+
+
+
+class MockServerRequestHandler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        self.send_response(requests.codes.ok)
+        self.end_headers()
+        return
+
+
+def get_free_port():
+    """Simple function that acquires a port, closes it, and returns what that port numnber was"""
+    s = socket.socket(socket.AF_INET, type=socket.SOCK_STREAM)
+    s.bind(('localhost', 0))
+    address, port = s.getsockname()
+    s.close()
+    return port
+
+# TODO determine what scope this fixture should have
+@pytest.fixture
+def mockserver():
+    # Setup
+    mock_server_port = get_free_port()
+    mock_server = HTTPServer(('localhost', mock_server_port), MockServerRequestHandler)
+    mock_server_thread = Thread(target=mock_server.serve_forever)
+    mock_server_thread.setDaemon(True)
+    mock_server_thread.start()
+
+    return mock_server_port
+

tests/test_mock_server.py

@@ -0,0 +1,10 @@
+import requests
+
+def test_request_response(mockserver):
+    mock_server_port = mockserver
+    url = 'http://localhost:{port}/users'.format(port=mock_server_port)
+
+    response = requests.get(url)
+
+    assert response.ok
+

tests/test_todos.py

@@ -70,6 +70,7 @@ def testing_getting_uncompleted_todos_when_todos_is_none():
 
 
 def test_integration_contract():
+    """Test used to maintain the actual vs mocked API response contract"""
     actual = get_todos()
     actual_keys = actual.json().pop().keys()