Add pytest configuration and agent instructions

Author: swilson15

.vscode/settings.json

@@ -25,5 +25,10 @@
       "source.fixAll": "explicit",
       "source.organizeImports": "explicit"
     }
-  }
+  },
+  "python.testing.pytestArgs": [
+    "."
+  ],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
 }

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+testpaths = tests

tests/test_hello_world.py

@@ -0,0 +1,2 @@
+def test_hello_world():
+    assert 1 + 1 == 2