Fix smoke tests & correctly running tests using Python 2.7 (#11517)

* Fixes to running tests with Python 2.7

* Fix smoke tests pipeline

Author: Kartik Raj

.github/workflows/ci.yml

@@ -28,6 +28,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: Show all env vars
+        run: |
+          printenv
+        shell: bash
+
       - name: Use Python ${{env.PYTHON_VERSION}}
         uses: actions/setup-python@v1
         with:
@@ -92,6 +97,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: Show all env vars
+        run: |
+          printenv
+        shell: bash
+
       - name: Retrieve cached npm files
         uses: actions/cache@v1
         with:
@@ -201,6 +211,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: Show all env vars
+        run: |
+          printenv
+        shell: bash
+
       - name: Retrieve cached npm files
         uses: actions/cache@v1
         with:
@@ -255,7 +270,7 @@ jobs:
       - name: Install test requirements
         run: python -m pip install --upgrade -r build/test-requirements.txt
 
-      - name: Install IPython test requirements
+      - name: pip install ipython requirements
         run: |
           python -m pip install numpy
           python -m pip install --upgrade -r ./build/ipython-test-requirements.txt
@@ -330,6 +345,13 @@ jobs:
           & $condaExecPath create -p "./test_env2" -y python
           & $condaExecPath create -p "~/test_env3" -y python
 
+      - name: Set CI_PYTHON_PATH and CI_DISABLE_AUTO_SELECTION
+        run: |
+          echo "::set-env name=CI_PYTHON_PATH::python"
+          echo "::set-env name=CI_DISABLE_AUTO_SELECTION::1"
+        shell: bash
+        if: matrix.test-suite != 'ts-unit'
+
       # Run TypeScript unit tests only for Python 3.X.
       - name: Run TypeScript unit tests
         run: npm run test:unittests:cover
@@ -402,6 +424,16 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: Show all env vars
+        run: |
+          printenv
+        shell: bash
+
+      - name: Use Python ${{matrix.python}}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{matrix.python}}
+
       - name: Retrieve cached npm files
         uses: actions/cache@v1
         with:
@@ -411,6 +443,23 @@ jobs:
       - name: Install dependencies (npm ci)
         run: npm ci --prefer-offline
 
+      - name: pip install system test requirements
+        run: |
+          python -m pip install --upgrade -r build/test-requirements.txt
+          python -m pip --disable-pip-version-check install -t ./pythonFiles/lib/python --no-cache-dir --implementation py --no-deps --upgrade -r requirements.txt
+          python -m pip --disable-pip-version-check install -t ./pythonFiles/lib/python/old_ptvsd --no-cache-dir --implementation py --no-deps --upgrade 'ptvsd==4.3.2'
+          python -m pip --disable-pip-version-check install -t ./pythonFiles/lib/python/debugpy/no_wheels --no-cache-dir --implementation py --no-deps --upgrade --pre debugpy
+        shell: bash
+
+      - name: pip install ipython requirements
+        run: |
+          python -m pip install numpy
+          python -m pip install --upgrade -r ./build/ipython-test-requirements.txt
+
+      - name: pip install jupyter
+        run: |
+          python -m pip install --upgrade jupyter
+
       - name: Download VSIX
         uses: actions/download-artifact@v1
         with:
@@ -425,6 +474,12 @@ jobs:
           npx tsc -p ./
         shell: bash
 
+      - name: Set CI_PYTHON_PATH and CI_DISABLE_AUTO_SELECTION
+        run: |
+          echo "::set-env name=CI_PYTHON_PATH::python"
+          echo "::set-env name=CI_DISABLE_AUTO_SELECTION::1"
+        shell: bash
+
       - name: Run smoke tests
         env:
           DISPLAY: 10

src/client/common/configSettings.ts

@@ -605,7 +605,7 @@ export class PythonSettings implements IPythonSettings {
                 ? this.interpreterPathService.get(this.workspaceRoot)
                 : pythonSettings.get<string>('pythonPath')
         )!;
-        if (this.pythonPath.length === 0 || this.pythonPath === 'python') {
+        if (!process.env.CI_DISABLE_AUTO_SELECTION && (this.pythonPath.length === 0 || this.pythonPath === 'python')) {
             const autoSelectedPythonInterpreter = this.interpreterAutoSelectionService.getAutoSelectedInterpreter(
                 this.workspaceRoot
             );