Migrate to charmcraft 3 & charmcraft test (#210)

Ported from
canonical/mysql-router-k8s-operator#379

Author: carlcsaposs-canonical

.github/workflows/ci.yaml

@@ -9,9 +9,13 @@ concurrency:
 on:
   pull_request:
   schedule:
-    - cron: '53 0 * * *' # Daily at 00:53 UTC
+    - cron: '53 0 * * *'  # Daily at 00:53 UTC
   # Triggered on push to branch "main" by .github/workflows/release.yaml
   workflow_call:
+    outputs:
+      artifact-prefix:
+        description: build_charm.yaml `artifact-prefix` output
+        value: ${{ jobs.build.outputs.artifact-prefix }}
 
 jobs:
   lint:
@@ -31,7 +35,7 @@ jobs:
   unit-test:
     name: Unit test charm
     runs-on: ubuntu-22.04  # TODO: use ubuntu-latest after fixing pathlib issue on python 3.12
-    timeout-minutes: 5
+    timeout-minutes: 20
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -66,116 +70,17 @@ jobs:
 
   build:
     name: Build charm
-    uses: canonical/data-platform-workflows/.github/workflows/[email protected]
-    with:
-      # Use of cache blocked by https://github.com/canonical/charmcraft/issues/1456
-      # Details: https://github.com/canonical/charmcraftcache/issues/3
-      cache: false
-      # Remove prefix when cache enabled
-      # Needed to avoid conflict with artifact name on release CI
-      artifact-prefix: ci-packed-charm-cache-false-.
+    uses: canonical/data-platform-workflows/.github/workflows/[email protected]
 
-  gh-hosted-collect-integration-tests:
-    name: (GH hosted) Collect integration test groups
-    needs:
-      - lint
-      - unit-test
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install tox & poetry
-        run: |
-          pipx install tox
-          pipx install poetry
-      - name: Select test stability level
-        id: select-test-stability
-        run: |
-          if [[ "${{ github.event_name }}" == "schedule" ]]
-          then
-            echo Running unstable and stable tests
-            echo "mark_expression=" >> "$GITHUB_OUTPUT"
-          else
-            echo Skipping unstable tests
-            echo "mark_expression=not unstable" >> "$GITHUB_OUTPUT"
-          fi
-      - name: Collect test groups
-        id: collect-groups
-        run: tox run -e integration -- tests/integration -m '${{ steps.select-test-stability.outputs.mark_expression }}' --collect-groups
-    outputs:
-      groups: ${{ steps.collect-groups.outputs.groups }}
-
-  gh-hosted-integration-test:
-    strategy:
-      fail-fast: false
-      matrix:
-        groups: ${{ fromJSON(needs.gh-hosted-collect-integration-tests.outputs.groups) }}
-        ubuntu-versions:
-          # Update whenever charmcraft.yaml is changed
-          - series: focal
-            bases-index: 0
-          - series: jammy
-            bases-index: 1
-        juju-snap-channel:  ["2.9/stable", "3.6/stable"]
-        include:
-          - juju-snap-channel: "3.6/stable"
-            agent-version: "3.6.1"
-            libjuju-version: "3.6.0.0"
-          - juju-snap-channel: "2.9/stable"
-            agent-version: "2.9.51"
-            libjuju-version:  "2.9.49.0"
-        exclude:
-          - groups: {path_to_test_file: tests/integration/test_data_integrator.py}
-            ubuntu-versions: {series: focal}
-          - groups: {path_to_test_file: tests/integration/test_hacluster.py}
-            ubuntu-versions: {series: focal}
-    name: ${{ matrix.juju-snap-channel }} - (GH hosted) ${{ matrix.groups.job_name }} | ${{ matrix.ubuntu-versions.series }}
+  integration-test:
+    name: Integration test charm
     needs:
       - lint
       - unit-test
       - build
-      - gh-hosted-collect-integration-tests
-    runs-on: ubuntu-latest
-    timeout-minutes: 120
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install tox & poetry
-        run: |
-          pipx install tox
-          pipx install poetry
-      - name: Setup operator environment
-        uses: charmed-kubernetes/actions-operator@main
-        with:
-          provider: lxd
-          bootstrap-options: "--agent-version ${{ matrix.agent-version }}"
-          juju-channel: ${{ matrix.juju-snap-channel }}
-      - name: Update python-libjuju version
-        if: ${{ matrix.libjuju-version == '2.9.49.0' }}
-        run: poetry add --lock --group integration juju@'${{ matrix.libjuju-version }}'
-      - name: Download packed charm(s)
-        uses: actions/download-artifact@v4
-        with:
-          pattern: ${{ needs.build.outputs.artifact-prefix }}-*
-          merge-multiple: true
-      - name: Select test stability level
-        id: select-test-stability
-        run: |
-          if [[ "${{ github.event_name }}" == "schedule" ]]
-          then
-            echo Running unstable and stable tests
-            echo "mark_expression=" >> "$GITHUB_OUTPUT"
-          else
-            echo Skipping unstable tests
-            echo "mark_expression=not unstable" >> "$GITHUB_OUTPUT"
-          fi
-      - name: Run integration tests
-        run: tox run -e integration -- "${{ matrix.groups.path_to_test_file }}" --group="${{ matrix.groups.group_number }}" -m '${{ steps.select-test-stability.outputs.mark_expression }}' --mysql-router-charm-series=${{ matrix.ubuntu-versions.series }} --mysql-router-charm-bases-index=${{ matrix.ubuntu-versions.bases-index }}
-        env:
-          LIBJUJU_VERSION_SPECIFIER: ${{ matrix.libjuju-version }}
-          SECRETS_FROM_GITHUB: |
-            {
-              "UBUNTU_PRO_TOKEN" : "${{ secrets.UBUNTU_PRO_TOKEN }}",
-              "LANDSCAPE_ACCOUNT_NAME": "${{ secrets.LANDSCAPE_ACCOUNT_NAME }}",
-              "LANDSCAPE_REGISTRATION_KEY": "${{ secrets.LANDSCAPE_REGISTRATION_KEY }}",
-            }
+    uses: ./.github/workflows/integration_test.yaml
+    with:
+      artifact-prefix: ${{ needs.build.outputs.artifact-prefix }}
+    secrets: inherit
+    permissions:
+      contents: write  # Needed for Allure Report