Replaced xvfb-run with manually starting Xvfb and running fluxbox to emulate a window manager and combined test and coverage steps into a single step.

.github/workflows/ci.yml

@@ -17,8 +17,8 @@ jobs:
         - { name: Windows VS2022 x64,     os: windows-2022, flags: -A x64 }
         - { name: Windows VS2022 ClangCL, os: windows-2022, flags: -T ClangCL }
         - { name: Windows VS2022 Clang,   os: windows-2022, flags: -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -GNinja }
-        - { name: Linux GCC,            os: ubuntu-latest, prefix: xvfb-run -a, flags: -DSFML_RUN_DISPLAY_TESTS=ON -GNinja }
+        - { name: Linux GCC,            os: ubuntu-latest, flags: -DSFML_RUN_DISPLAY_TESTS=ON -GNinja }
-        - { name: Linux Clang,          os: ubuntu-latest, prefix: xvfb-run -a, flags: -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DSFML_RUN_DISPLAY_TESTS=ON -GNinja , gcovr_options: '--gcov-executable="llvm-cov-$CLANG_VERSION gcov"' }
+        - { name: Linux Clang,          os: ubuntu-latest, flags: -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DSFML_RUN_DISPLAY_TESTS=ON -GNinja , gcovr_options: '--gcov-executable="llvm-cov-$CLANG_VERSION gcov"' }
         - { name: MacOS,                os: macos-11, flags: -GNinja }
         - { name: MacOS Xcode,          os: macos-11, flags: -GXcode }
         config:
@@ -57,7 +57,7 @@ jobs:
 
     - name: Install Linux Dependencies
       if: runner.os == 'Linux'
-      run: sudo apt-get update && sudo apt-get install ninja-build xorg-dev libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev
+      run: sudo apt-get update && sudo apt-get install ninja-build xorg-dev libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev xvfb fluxbox
 
     - name: Install Android Components
       if: matrix.platform.name == 'Android'
@@ -95,18 +95,34 @@ jobs:
       run: cmake --build $GITHUB_WORKSPACE/build --config ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }} --target install
 
     - name: Test
-      if: runner.os == 'Windows'
+      uses: nick-fields/retry@v2
+      with:
+        max_attempts: 10
+        timeout_minutes: 3
+        retry_wait_seconds: 5
+        warning_on_retry: false
         shell: bash
-      run: cmake --build $GITHUB_WORKSPACE/build --target runtests --config ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }}
+        command: |
-
+          if [ "${{ runner.os }}" == "Windows" ]; then
-    - name: Test
+            # Run the tests
-      if: runner.os != 'Windows'
+            cmake --build $GITHUB_WORKSPACE/build --target runtests --config ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }}
-      shell: bash
+            # Coverage is already generated on Windows when running tests.
-      run: ${{matrix.platform.prefix}} ctest --test-dir $GITHUB_WORKSPACE/build --output-on-failure --config ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }}
+          else
-
+            # Start up Xvfb and fluxbox to host display tests on DISPLAY :99
-    - name: Generate Coverage Report
+            if [ "${{ runner.os }}" == "Linux" ]; then
-      if: matrix.type.name == 'Debug' && runner.os != 'Windows' # Coverage is already generated on Windows when running tests.
+              export DISPLAY=":99"
-      run: gcovr -r $GITHUB_WORKSPACE -x $GITHUB_WORKSPACE/build/coverage.out -s -f 'src/SFML/.*' -f 'include/SFML/.*' ${{ matrix.platform.gcovr_options }} $GITHUB_WORKSPACE
+              Xvfb $DISPLAY -screen 0 1920x1080x24 &
+              sleep 5
+              fluxbox > /dev/null 2>&1 &
+              sleep 5
+            fi
+            # Run the tests
+            ctest --test-dir $GITHUB_WORKSPACE/build --output-on-failure --config ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }}
+            # Run gcovr to extract coverage information from the test run
+            if [ "${{ matrix.type.name }}" == "Debug" ]; then
+              gcovr -r $GITHUB_WORKSPACE -x $GITHUB_WORKSPACE/build/coverage.out -s -f 'src/SFML/.*' -f 'include/SFML/.*' ${{ matrix.platform.gcovr_options }} $GITHUB_WORKSPACE
+            fi
+          fi
 
     - name: Download Codecov Uploader
       if: matrix.type.name == 'Debug' && github.repository == 'SFML/SFML' # Disable upload in forks

test/CMakeLists.txt

@@ -49,13 +49,7 @@ target_compile_definitions(test-sfml-system PRIVATE
     EXPECTED_SFML_VERSION_IS_RELEASE=$<IF:$<BOOL:${VERSION_IS_RELEASE}>,true,false>
 )
 
-# FIXME Remove this once the Buildbot supports handling display tests on Linux platforms
+sfml_set_option(SFML_RUN_DISPLAY_TESTS ON BOOL "TRUE to run tests that require a display, FALSE to ignore it")
-if(SFML_OS_WINDOWS OR SFML_OS_MACOSX)
-    set(SFML_RUN_DISPLAY_TESTS_DEFAULT ON)
-else()
-    set(SFML_RUN_DISPLAY_TESTS_DEFAULT OFF)
-endif()
-sfml_set_option(SFML_RUN_DISPLAY_TESTS ${SFML_RUN_DISPLAY_TESTS_DEFAULT} BOOL "TRUE to run tests that require a display, FALSE to ignore it")
 
 set(WINDOW_SRC
     Window/Context.test.cpp