Add GameTestLoaderHelpers for Forge and NeoForge

loader-common/src/main/java/org/cyclops/cyclopscore/gametest/GameTestLoaderHelpers.java

@@ -0,0 +1,56 @@
+package org.cyclops.cyclopscore.gametest;
+
+import com.google.common.collect.Lists;
+import net.minecraft.gametest.framework.GameTest;
+import net.minecraft.gametest.framework.GameTestAssertException;
+import net.minecraft.gametest.framework.StructureUtils;
+import net.minecraft.gametest.framework.TestFunction;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * Utilities for loading game tests in a multi-loader environment.
+ * @author rubensworks
+ */
+public class GameTestLoaderHelpers {
+
+    public static Collection<TestFunction> generateCommonTests(String modId, Class<?>[] testClasses) throws InstantiationException, IllegalAccessException {
+        List<TestFunction> testsList = Lists.newArrayList();
+
+        for(Class<?> clazz : testClasses) {
+            Object instance = clazz.newInstance();
+            for (Method method : clazz.getDeclaredMethods()) {
+                if (method.isAnnotationPresent(GameTest.class)) {
+                    GameTest gameTest = method.getAnnotation(GameTest.class);
+                    testsList.add(new TestFunction(
+                            modId,
+                            modId + "." + method.getName(),
+                            gameTest.template(),
+                            StructureUtils.getRotationForRotationSteps(gameTest.rotationSteps()),
+                            gameTest.timeoutTicks(),
+                            gameTest.setupTicks(),
+                            gameTest.required(),
+                            gameTest.manualOnly(),
+                            gameTest.attempts(),
+                            gameTest.requiredSuccesses(),
+                            gameTest.skyAccess(),
+                            (gameTestHelpers) -> {
+                                try {
+                                    method.invoke(instance, gameTestHelpers);
+                                } catch (InvocationTargetException | IllegalAccessException e) {
+                                    e.printStackTrace();
+                                    throw new GameTestAssertException(e.getMessage());
+                                }
+                            }
+                    ));
+                }
+            }
+        }
+
+        return testsList;
+    }
+
+}