Actually delegate in AbstractDelegateExtent (#2196)

* actually delegate in AbstractDelegateExtent

* exclude enableHistory method

worldedit-core/src/test/java/com/fastasyncworldedit/ArchitecturalTest.java

@@ -0,0 +1,30 @@
+package com.fastasyncworldedit;
+
+import com.sk89q.worldedit.extent.AbstractDelegateExtent;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class ArchitecturalTest {
+
+    public static Stream<Arguments> abstractDelegateExtentMethods() {
+        return Arrays.stream(AbstractDelegateExtent.class.getMethods())
+                .filter(m -> m.getDeclaringClass() != Object.class) // ignore methods inherited from java.lang.Object
+                // TODO: figure out why enableHistory returns STQE instead of PQE when overriding
+                .filter(m -> !m.getName().equals("enableHistory"))
+                .map(Arguments::of);
+    }
+
+    @ParameterizedTest
+    @MethodSource("abstractDelegateExtentMethods")
+    void testAbstractDelegateExtentOverridesAllMethods(Method method) {
+        assertEquals(AbstractDelegateExtent.class, method.getDeclaringClass());
+    }
+
+}