Add unit test running hints to documentation

README.md

@@ -44,4 +44,16 @@ First install the environment with the required dependencies:
 
 Enter the virtual environment:
 
-    poetry shell
+    poetry shell
+
+
+
+## Running Unit Tests
+
+Run unit tests:
+
+    python -m pytest tests
+
+Run unit tests with coverage information:
+
+    python -m pytest --cov-report=html --cov=dem tests/

docs/development_environments.md

@@ -63,3 +63,8 @@ Installation can be done with the `dem pull` command:
 !!! tip
 
     See the [`dem pull`](commands.md#dem-pull-dev_env_name) command for more details.
+
+
+
+
+