cellengine · zbjornson · Sep 11, 2022 · Nov 30, 2021 · Jul 5, 2022 · Sep 11, 2022
diff --git a/.vscode/settings.json b/.vscode/settings.json
@@ -3,5 +3,7 @@
 		"cellengine",
 		"cytometry",
 		"scaleset"
-	]
+	],
+	"python.linting.enabled": true,
+	"python.linting.flake8Enabled": true
 }
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -0,0 +1,22 @@
+## Contributing
+
+### Running tests
+
+Unit tests run with `python3 -m pytest`.
+
+The integration tests need CellEngine credentials to run. In CI, these are
+provided by GitHub secrets. Locally, you need to set environment variables:
+
+```sh
+CELLENGINE_USERNAME="..."
+CELLENGINE_PASSWORD="..."
+# for running tests that require S3:
+S3_ACCESS_KEY="..."
+S3_SECRET_KEY="..."
+# Run the integration tests:
+python3 -m pytest ./tests/integration/test_integration.py
+```
+
+### Conventions
+
+* Error message text should end with a period.
diff --git a/cellengine/payloads/gate.py b/cellengine/payloads/gate.py
diff --git a/cellengine/payloads/gate_utils/__init__.py b/cellengine/payloads/gate_utils/__init__.py
diff --git a/cellengine/payloads/gate_utils/ellipse_gate.py b/cellengine/payloads/gate_utils/ellipse_gate.py
diff --git a/cellengine/payloads/gate_utils/polygon_gate.py b/cellengine/payloads/gate_utils/polygon_gate.py