fix ubuntu headless test issues

Author: lucasstarsz

src/test/java/unittest/testcases/engine/config/EngineConfigTests.java

@@ -8,12 +8,20 @@
 import tech.fastj.math.Maths;
 import tech.fastj.math.Point;
 
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
+import unittest.EnvironmentHelper;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assumptions.assumeFalse;
 
 class EngineConfigTests {
 
+    @BeforeAll
+    public static void onlyRunIfNotHeadless() {
+        assumeFalse(EnvironmentHelper.IsEnvironmentHeadless);
+    }
+
     @Test
     void checkEngineConfigDefaults_shouldMatchEngineDefaults() {
         assertEquals(FastJEngine.DefaultFPS, EngineConfig.Default.targetFPS(), "The default engine config FPS should match the default FPS.");