Add network hobbling during testing and fix test

tests/conftest.py

@@ -0,0 +1,15 @@
+import pytest
+import requests
+
+
+@pytest.fixture(autouse=True)
+def hobble_network(monkeypatch, request):
+    """Hobble all network calls made through the requests library"""
+
+    if "no_hobble_network" in request.keywords:
+        return
+
+    def hobbled_send(session, request_object, **kwargs):
+        raise RuntimeError(f"requests hobbled for testing: tried calling {request_object.url}")
+
+    monkeypatch.setattr(requests.Session, "send", hobbled_send)

tests/test_endpoint.py

@@ -26,7 +26,10 @@ def stub_response(**kwargs):
 
 
 class TestEndpoint:
-    def test_call(self, service):
+    @mock.patch("requests.Session", autospec=True)
+    def test_call(self, MockSession, service):
+        mock_session = MockSession()
+        mock_session.proxies = {}
         service.foo = apiron.Endpoint()
         service.foo()