Add test coverage support

Author: mateusz834

.github/workflows/test.yml

@@ -61,3 +61,9 @@ jobs:
         run: make test-unit
       - name: Run integration/system tests
         run: make test-integration
+      - name: Coverage summary
+        run: |
+          echo "## Coverage" >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          make coverage-report | tee -a "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"

Makefile

@@ -72,7 +72,8 @@ docs-zip: docs
 # -ra prints a report on all failed tests after a run
 # -vv shows why a test failed while the rest of the suite is running
 PYTHON_CMD := uv run python
-PYTEST_CMD := $(PYTHON_CMD) -m pytest --no-header --ff -ra -vv
+COV_ARGS := --cov=splunklib --cov-report=term-missing --cov-append
+PYTEST_CMD := $(PYTHON_CMD) -m pytest --no-header --ff -ra -vv $(COV_ARGS)
 
 .PHONY: test
 test:
@@ -90,6 +91,10 @@ test-integration:
 test-ai:
 	$(PYTEST_CMD) ./tests/integration/ai ./tests/unit/ai
 
+.PHONY: coverage-report
+coverage-report:
+	$(UV_RUN_CMD) coverage report
+
 ## DOCKER
 
 CONTAINER_NAME := splunk