Add non-headless singleplayer tests to CI

.github/workflows/linux.yml

@@ -119,7 +119,7 @@ jobs:
       - name: Install deps
         run: |
           source ./util/ci/common.sh
-          install_linux_deps clang-18 lldb
+          install_linux_deps clang-18 lldb xvfb
 
       - name: Build
         run: |
@@ -136,6 +136,10 @@ jobs:
         run: |
           ./util/test_multiplayer.sh
 
+      - name: Singleplayer test
+        run: |
+          xvfb-run ./util/test_singleplayer.sh
+
   # Build with prometheus-cpp (server-only), also runs on ARM64
   clang_prometheus_arm:
     name: "clang (with Prometheus, ARM64)"

.github/workflows/lua.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Install deps
       run: |
         source ./util/ci/common.sh
-        install_linux_deps clang gdb libluajit-5.1-dev
+        install_linux_deps clang gdb libluajit-5.1-dev xvfb
 
     - name: Build
       run: |
@@ -37,6 +37,10 @@ jobs:
       run: |
         serverconf="profiler.load=true" ./util/test_multiplayer.sh
 
+    - name: Singleplayer test (GL3)
+      run: |
+        clientconf="video_driver=opengl3" xvfb-run ./util/test_singleplayer.sh
+
   luacheck:
     name: "Builtin Luacheck and Unit Tests"
     runs-on: ubuntu-latest