Add integration tests for pip

.github/workflows/ci.yml

@@ -10,6 +10,9 @@ defaults:
   run:
     shell: bash
 
+env:
+  FORCE_COLOR: "1"
+
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -41,18 +44,18 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
           go-version: 1.x
-      
+
       - name: Install mkcert on macOS
         if: runner.os == 'macOS'
         run: |
@@ -73,3 +76,37 @@ jobs:
         run: |
           python -m pip install nox
           nox -s test
+
+  integration-pip:
+    runs-on: ubuntu-latest
+    name: Integration pip
+    timeout-minutes: 10
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+        with:
+          path: truststore
+
+      - name: Checkout pypa/pip
+        uses: actions/checkout@v3
+        with:
+          repository: pypa/pip
+          path: pip
+
+      - name: Setup Python 3.10
+        uses: actions/setup-python@v3
+        with:
+          python-version: "3.10"
+
+      - name: Patch tests to install local copy of truststore
+        working-directory: "${{ github.workspace }}/pip"
+        run: |
+          sed -i 's|script.pip("install", "truststore")|script.pip("install", "${{ github.workspace }}/truststore")|' tests/functional/test_truststore.py
+
+      - name: Run tests
+        working-directory: "${{ github.workspace }}/pip"
+        run: |
+          python -m pip install nox
+          nox -s test-3.10 -- \
+            -m integration \
+            tests/functional/test_truststore.py