Configuration - Add support for Google Test framework in CMake #443

Enhance Google Test integration and add support for test projects.
Each Toolkit have GTests folder with place for new tests.
For adding new tests needs to extend FILES.cmake files in each GTests folder.
The single executable is created for each toolkit with all tests.
The tests grouped by module and toolkit with :: as separator.
Added option to download GTest by Cmake if not found.
Add GTest for PLib_JacobiPolynomial with comprehensive test cases
Add GTest for TCollection_AsciiString and TCollection_ExtendedString
Set C++ standard to C++14 for GTest compatibility if required

.github/actions/run-gtest/action.yml

@@ -0,0 +1,145 @@
+name: 'Run GTest Validation'
+description: 'Execute GTest suite and validate results'
+
+inputs:
+  platform:
+    description: 'Platform (windows, macos, linux)'
+    required: true
+  compiler:
+    description: 'Compiler (msvc, clang, gcc)'
+    required: true
+  install-artifact-name:
+    description: 'Name of the artifact containing the installed files'
+    required: true
+  artifact-suffix:
+    description: 'Suffix for the GTest results artifact name'
+    required: true
+    default: 'x64'
+
+outputs:
+  has-failures:
+    description: 'Whether any tests failed'
+    value: ${{ steps.check-failures.outputs.has_failures }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Download and extract install directory
+      uses: actions/download-artifact@v4.1.7
+      with:
+        name: ${{ inputs.install-artifact-name }}
+        path: install
+
+    - name: Download and extract 3rdparty dependencies for Windows
+      if: inputs.platform == 'windows'
+      shell: pwsh
+      run: |
+        Invoke-WebRequest -Uri https://github.com/Open-Cascade-SAS/OCCT/releases/download/V7_9_0_beta1/3rdparty-vc14-64.zip -OutFile 3rdparty-vc14-64.zip
+        Expand-Archive -Path 3rdparty-vc14-64.zip -DestinationPath .
+        Remove-Item 3rdparty-vc14-64.zip
+
+    - name: Install macOS dependencies
+      if: inputs.platform == 'macos'
+      shell: bash
+      run: |
+        brew update
+        brew install tcl-tk tbb gl2ps xerces-c \
+                     libxmu libxi libxft libxpm \
+                     glew freeimage draco glfw
+
+    - name: Install Linux dependencies
+      if: inputs.platform == 'linux'
+      shell: bash
+      run: |
+        sudo apt-get update && sudo apt-get install -y tcl-dev tk-dev cmake clang make libbtbb-dev libx11-dev libglu1-mesa-dev tcllib tcl-thread tcl libvtk9-dev libopenvr-dev libdraco-dev libfreeimage-dev libegl1-mesa-dev libgles2-mesa-dev libfreetype-dev
+
+    - name: Setup Xvfb and Mesa for Linux
+      if: inputs.platform == 'linux'
+      uses: ./.github/actions/setup-xvfb-mesa
+
+    - name: Set execute permissions on Unix platforms
+      if: inputs.platform != 'windows'
+      shell: bash
+      run: |
+        chmod +x install/bin/OpenCascadeGTest
+
+    - name: Run OpenCascadeGTest on Windows
+      if: inputs.platform == 'windows'
+      id: run-gtest-windows
+      shell: cmd
+      run: |
+        cd install
+        call env.bat ${{ inputs.compiler == 'msvc' && 'vc14' || 'clang' }} win64 release
+        cd bin
+        set GTEST_OUTPUT=""
+        OpenCascadeGTest.exe --gtest_output=xml:gtest_results.xml > gtest_output.log 2>&1
+        type gtest_output.log
+        exit /b 0
+
+    - name: Run OpenCascadeGTest on Unix platforms
+      if: inputs.platform != 'windows'
+      id: run-gtest-unix
+      shell: bash
+      env:
+        DISPLAY: ${{ inputs.platform == 'linux' && ':99' || '' }}
+        LIBGL_ALWAYS_SOFTWARE: 1
+      run: |
+        cd install/bin
+        source env.sh
+        ./OpenCascadeGTest --gtest_output=xml:gtest_results.xml > gtest_output.log 2>&1
+        cat gtest_output.log
+
+    - name: Upload GTest results
+      uses: actions/upload-artifact@v4.4.3
+      with:
+        name: gtest-results-${{ inputs.platform }}-${{ inputs.compiler }}-${{ inputs.artifact-suffix }}
+        path: |
+          install/bin/gtest_results.xml
+          install/bin/gtest_output.log
+        retention-days: 15
+
+    - name: Check for test failures on Windows
+      if: inputs.platform == 'windows'
+      id: check-failures-windows
+      shell: pwsh
+      run: |
+        cd install/bin
+        $log = Get-Content "gtest_output.log" -Raw
+        if ($log -match "\[\s+FAILED\s+\]") {
+          Write-Error "GTest failures detected in the output."
+          echo "has_failures=true" >> $env:GITHUB_OUTPUT
+        } else {
+          Write-Output "No GTest failures detected."
+          echo "has_failures=false" >> $env:GITHUB_OUTPUT
+        }
+
+    - name: Check for test failures on Unix
+      if: inputs.platform != 'windows'
+      id: check-failures-unix
+      shell: bash
+      run: |
+        cd install/bin
+        if grep -q "\[  FAILED  \]" gtest_output.log; then
+          echo "::error::GTest failures detected in the output."
+          echo "has_failures=true" >> $GITHUB_OUTPUT
+        else
+          echo "No GTest failures detected."
+          echo "has_failures=false" >> $GITHUB_OUTPUT
+        fi
+
+    - name: Set combined output
+      id: check-failures
+      shell: bash
+      run: |
+        if [ "${{ inputs.platform }}" == "windows" ]; then
+          echo "has_failures=${{ steps.check-failures-windows.outputs.has_failures }}" >> $GITHUB_OUTPUT
+        else
+          echo "has_failures=${{ steps.check-failures-unix.outputs.has_failures }}" >> $GITHUB_OUTPUT
+        fi
+
+    - name: Fail job if tests failed
+      if: steps.check-failures.outputs.has_failures == 'true'
+      shell: bash
+      run: |
+        echo "::error::GTest failures detected"
+        exit 1