Added LabThing client fixture

Author: Joel Collins

tests/conftest.py

@@ -114,6 +114,11 @@ def client(app):
     return app.test_client()
 
 
+@pytest.fixture
+def thing_client(thing):
+    return thing.app.test_client()
+
+
 @pytest.fixture
 def static_path(app):
     return os.path.join(os.path.dirname(__file__), "static")