Expand GameRule API

src/test/java/org/bukkit/GameRuleTest.java

@@ -0,0 +1,56 @@
+package org.bukkit;
+
+import java.util.Map;
+import java.util.TreeMap;
+import net.minecraft.server.GameRules;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class GameRuleTest {
+
+    @Test
+    public void testBukkitRules() {
+        GameRule<?>[] rules = GameRule.values();
+
+        for (GameRule<?> rule : rules) {
+            GameRule<?> registeredRule = GameRule.getByName(rule.getName());
+            Assert.assertNotNull("Null GameRule", registeredRule);
+            Assert.assertEquals("Invalid GameRule equality", rule, registeredRule);
+        }
+    }
+
+    @Test
+    public void testMinecraftRules() {
+        TreeMap<String, GameRules.b> minecraftRules = GameRules.getGameRules();
+
+        for (Map.Entry<String, GameRules.b> entry : minecraftRules.entrySet()) {
+            GameRule<?> bukkitRule = GameRule.getByName(entry.getKey());
+
+            Assert.assertNotNull(bukkitRule);
+            Assert.assertEquals("Invalid GameRule Name", bukkitRule.getName(), entry.getKey());
+        }
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void nullGameRuleName() {
+        GameRule.getByName(null);
+    }
+
+    @Test
+    public void emptyGameRuleName() {
+        Assert.assertNull(GameRule.getByName(""));
+    }
+
+    @Test
+    public void incorrectGameRuleName() {
+        Assert.assertNull(GameRule.getByName("doAnnounceAdvancements"));
+        Assert.assertNull(GameRule.getByName("sendCommandBlockFeedback"));
+    }
+
+    @Test
+    public void invalidCasing() {
+        Assert.assertNull(GameRule.getByName("CommandBlockOutput"));
+        Assert.assertNull(GameRule.getByName("spAwnRadius"));
+        Assert.assertNull(GameRule.getByName("rand0mTickSpeEd"));
+    }
+}