add unit test for trainer sdk

.github/workflows/test-unit.yaml

@@ -0,0 +1,37 @@
+name: Unit Test - Python
+
+on:
+  - pull_request
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: pre-commit/action@v3.0.1
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install uv
+        run: |
+          make uv
+
+      - name: Run Tests
+        run: |
+          make test-unit xml=true
+
+      - name: Upload coverage to Coveralls
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          coveralls --verbose || echo "Coveralls report failed"

.gitignore

@@ -9,4 +9,6 @@ __debug_bin
 # Python cache files
 __pycache__/
 *.egg-info/
-bin
+
+.coverage
+bin

Makefile

@@ -52,14 +52,19 @@ uv: ## Install UV
 ruff: ## Install Ruff
 	@uvx ruff --help &> /dev/null || uv tool install ruff
 
-
 .PHONY: verify
 verify: uv ruff  ## install all required tools
 	@cd $(PY_DIR) && uv lock --check
 	@cd $(PY_DIR) && uvx ruff check --show-fixes
 
-.PHONY: test-python
-test-python: ## Run Python unit test.
-	uv install --dev
-	PYTHONPATH=$(PROJECT_DIR) pytest ./python/kubeflow
-
+ # make test-unit will produce html coverage by default. Run with `make test-unit report=xml` to produce xml report.
+.PHONY: test-unit
+test-unit:
+	uv pip install "./python[test]"
+	coverage run --source=kubeflow.trainer.api.trainer_client,kubeflow.trainer.utils.utils -m pytest ./python/kubeflow/trainer/api/trainer_client_test.py
+	coverage report -m kubeflow/trainer/api/trainer_client.py kubeflow/trainer/utils/utils.py
+ifeq ($(report),xml)
+	coverage xml
+else
+	coverage html
+endif