Install cubit in GitHub hosted container

.github/actions/setup_cubit/action.yml

@@ -0,0 +1,15 @@
+name: setup_cubit
+description: Setup a Cubit installation for testing
+inputs:
+  cubit_download_url:
+    description: URL where Cubit can be downloaded from
+    required: true
+runs:
+  using: composite
+  steps:
+    - name: Download and unpack Cubit
+      shell: bash
+      run: |
+        cd ${GITHUB_WORKSPACE}
+        wget -q ${{ inputs.cubit_download_url }}
+        tar -xzf *.tar.gz

.github/workflows/testing.yml

@@ -80,6 +80,8 @@ jobs:
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/4c-multiphysics/4c:main
+    env:
+      CUBIT_ROOT: ${GITHUB_WORKSPACE}/Coreform-Cubit-2025.3
     defaults:
       run:
         shell: bash
@@ -88,6 +90,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
+      - name: Setup cubit
+        uses: ./.github/actions/setup_cubit
+        with:
+          cubit_download_url: https://f002.backblazeb2.com/file/cubit-downloads/Coreform-Cubit/Releases/Linux/Coreform-Cubit-2025.3%2B58709-Lin64.tar.gz
       - name: Setup virtual python environment
         uses: ./.github/actions/setup_virtual_python_environment
       - name: Build ArborX geometric search
@@ -96,8 +102,8 @@ jobs:
         uses: ./.github/actions/run_tests
         with:
           source-command: "source python-workflow-venv/bin/activate"
-          install-command: "-e .[dev,fourc]"
-          additional-pytest-flags: "--4C --ArborX --cov-fail-under=93"
+          install-command: "-e .[cubitpy,dev,fourc]"
+          additional-pytest-flags: "--4C --ArborX --CubitPy --performance-tests --cov-fail-under=93"
       - name: Upload test results on failure
         if: failure()
         uses: actions/upload-artifact@v4