Add unit test code coverage minimum requirement

Signed-off-by: Nathaniel Mitchell <[email protected]>

.github/workflows/tests.yml

@@ -131,7 +131,7 @@ jobs:
         modinfo "${MODULE}"
 
     - name: Upload Linux driver from ${{ steps.modinfo.outputs.module_path }}
-      uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4.5.0
+      uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
       with:
         name: chipsec-${{ steps.versions.outputs.chipsec }}.${{ matrix.distro.name }}-${{ matrix.distro.tag }}${{ matrix.distro.variant }}-${{ steps.versions.outputs.kernel }}.${{ steps.versions.outputs.uname_m }}
         path: ${{ steps.modinfo.outputs.module_path }}
@@ -180,14 +180,14 @@ jobs:
       run: python setup.py build_ext -i
 
     - name: Upload Windows Main driver
-      uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4.5.0
+      uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
       with:
         name: chipsec_drivers_windows_x64_py${{ matrix.versions.python }}_win${{ matrix.versions.window }}
         path: drivers/windows/chipsec/x64
         if-no-files-found: error
 
     - name: Upload Windows PCI Filter driver
-      uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4.5.0
+      uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
       with:
         name: pcifilter_drivers_windows_x64_py${{ matrix.versions.python }}_win${{ matrix.versions.window }}
         path: drivers/windows/pcifilter/x64
@@ -246,7 +246,7 @@ jobs:
       run: |
         sudo apt-get update -q
         sudo apt-get install -qqy dkms nasm python3-setuptools
-        pip install distro pytest
+        pip install distro pytest pytest-cov
         pip install -r linux_requirements.txt
         sudo pip uninstall importlib_metadata 
         sudo pip install importlib_metadata --force-reinstall
@@ -267,7 +267,7 @@ jobs:
       run: python3 -m unittest
 
     - name: Run Python pytest
-      run: python -m pytest tests
+      run: python -m pytest --cov-fail-under=${{ vars.COVERAGE_MINIMUM_REQUIREMENT}} tests
 
     - name: Run xml cfg checker
       run: |