Add GitHub actions for unit testing in Petals

.github/workflows/ci.yml

@@ -0,0 +1,13 @@
+name: GitHub CI
+
+on: [push]
+
+jobs:
+  ci:
+    name: Petals
+    uses: ./.github/workflows/testing.yml
+    with:
+      petals_branch: ${{ github.ref }}
+    permissions:
+      # For publishing results
+      checks: write

.github/workflows/testing.yml

@@ -0,0 +1,99 @@
+name: Petals Testing
+
+# 'Reusable workflow', can be triggered from other workflows
+on:
+  workflow_call:
+    inputs:
+      petals_branch:
+        description: Branch of CLIMADA Petals to check out
+        type: string
+        default: develop
+        required: false
+      core_branch:
+        description: Branch of CLIMADA Core to test against
+        type: string
+        default: develop
+        required: false
+
+
+# Use bash explicitly for being able to enter the conda environment
+defaults:
+  run:
+    shell: bash -el {0}
+
+jobs:
+  build-and-test:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+    permissions:
+      # For publishing results
+      checks: write
+
+    # Run this test for different Python versions
+    strategy:
+      # Do not abort other tests if only a single one fails
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
+
+    steps:
+      -
+        name: Checkout Petals
+        uses: actions/checkout@v4
+        with:
+          repository: CLIMADA-project/climada_petals
+          path: climada_petals
+          ref: ${{ inputs.petals_branch }}
+      -
+        name: Checkout Core
+        uses: actions/checkout@v4
+        with:
+          repository: CLIMADA-project/climada_python
+          path: climada_python
+          ref: ${{ inputs.core_branch }}
+      -
+        # Store the current date to use it as cache key for the environment
+        name: Get current date
+        id: date
+        run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
+      -
+        name: Create Environment with Mamba
+        uses: mamba-org/setup-micromamba@v1
+        with:
+          environment-name: climada_env_${{ matrix.python-version }}
+          environment-file: climada_python/requirements/env_climada.yml
+          # NOTE: Might be able to give second spec file in create-args in future
+          #       micromamba version
+          create-args: >-
+            python=${{ matrix.python-version }}
+            make
+          # Persist environment for branch, Python version, single day
+          cache-environment-key: env-${{ github.ref }}-${{ matrix.python-version }}-${{ steps.date.outputs.date }}
+      -
+        name: Update Environment for Petals
+        run: |
+          micromamba update -n climada_env_${{ matrix.python-version }} -f climada_petals/requirements/env_climada.yml
+      -
+        name: Install CLIMADA Core and Petals
+        run: |
+          python -m pip install "./climada_python[test]" "./climada_petals"
+      -
+        name: Run Unit Tests
+        working-directory: climada_petals/
+        run: |
+          make unit_test
+      -
+        name: Publish Test Results
+        uses: EnricoMi/publish-unit-test-result-action@v2
+        if: always()
+        with:
+          junit_files: climada_petals/tests_xml/tests.xml
+          check_name: "Petals / Unit Test Results (${{ matrix.python-version }})"
+          comment_mode: "off"
+      -
+        name: Upload Coverage Reports
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report-petals-unittests-py${{ matrix.python-version }}
+          path: climada_petals/coverage/

Makefile

@@ -5,8 +5,8 @@
 PYTEST_JUNIT_ARGS = --junitxml=tests_xml/tests.xml
 
 PYTEST_COV_ARGS = \
-	--cov --cov-config=.coveragerc --cov-report html --cov-report xml \
-	--cov-report term:skip-covered
+	--cov --cov-config=.coveragerc --cov-report html:coverage \
+	--cov-report xml:coverage.xml --cov-report term:skip-covered
 
 PYTEST_ARGS = $(PYTEST_JUNIT_ARGS) $(PYTEST_COV_ARGS)