[JUJU-2256] Add integration tests to github actions pinning juju 2.9 (#775)

* Add integration tests to github actions pinning juju 2.9
* Raise an error when Juju versions differs from 2.9.x

Author: juanmanuel-tirado

.github/workflows/test.yaml

@@ -0,0 +1,102 @@
+name: Testing
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    name: Linter
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v3
+    - name: Setup Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Install dependencies
+      run: pip install tox
+    - name: Run linter
+      run: tox -e lint
+
+  unit-tests:
+    needs: lint
+    name: Unit tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v3
+    - name: Setup Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Install dependencies
+      run: pip install tox
+    - name: Run unit tests
+      run: tox -e py3
+
+  integration:
+    name: Integration
+    needs: [lint, unit-tests]
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v3
+    - name: Setup operator environment
+      uses: charmed-kubernetes/actions-operator@main
+      with:
+        provider: lxd
+        juju-channel: 2.9/stable
+    - name: Set proxy in controller
+      run: |
+        set -euxo pipefail
+        # build a squid config file
+        CONTROLLER_IP=$(juju list-controllers --format yaml | yq '.controllers[.current-controller].recent-server' | awk -F '[:]' '{print $1}');
+        echo "Controller IP is: $CONTROLLER_IP"
+        PROXY=$CONTROLLER_IP:3128
+        echo "Proxy address is: $PROXY"
+        echo "acl all src all" > squid.conf
+        echo "http_access allow all" >> squid.conf
+        echo "http_port $PROXY" >> squid.conf
+        cat squid.conf
+        # copy to the controller and reconfigure it
+        juju status -m controller
+        juju switch controller
+        juju ssh 0 "sudo apt-get install squid -y"
+        juju scp squid.conf 0:/tmp/squid.conf
+        juju ssh 0 "sudo mv /tmp/squid.conf /etc/squid/squid.conf"
+        juju ssh 0 "sudo squid -k reconfigure"
+        # Test curl after waiting
+        sleep 10
+        echo "Test proxy access"
+        curl -s -o /dev/null -w "%{http_code}" --proxy http://$PROXY https://charmhub.io
+        # set model defaults
+        juju model-defaults apt-http-proxy=$PROXY apt-https-proxy=$PROXY  juju-http-proxy=$PROXY juju-https-proxy=$PROXY  snap-http-proxy=$PROXY snap-https-proxy=$PROXY
+        juju model-defaults
+    - name: Setup Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Install dependencies
+      run: pip install tox
+    - name: Run integration
+      # Force one single concurrent test
+      run: tox -e integration -- -n 1

.github/workflows/tox.yaml

@@ -11,8 +11,11 @@ Documentation: https://pythonlibjuju.readthedocs.io/en/latest/
 Requirements
 ------------
 
-* Python 3.5+
-* Juju 2.0+
+This version may support old versions of Juju. However, it has been
+tested with the following requirements.
+
+* Python 3.8/3.9/3.10
+* Juju 2.9.37
 
 
 Design Notes

docs/readme.rst

@@ -27,9 +27,9 @@ async def main():
     await model.connect()
 
     app = await model.deploy(
-        'cs:ubuntu-0',
+        'jammy',
         application_name='ubuntu',
-        series='trusty',
+        series='jammy',
         channel='stable',
     )
 

examples/unitrun.py

@@ -259,6 +259,10 @@ class EntityWatcherFacade(TypeFactory):
     pass
 
 
+class EnvironUpgraderFacade(TypeFactory):
+    pass
+
+
 class ExternalControllerUpdaterFacade(TypeFactory):
     pass