Made every CommandNode support an executor

src/main/test/net/minecraft/commands/builder/LiteralArgumentBuilderTest.java

@@ -3,6 +3,7 @@ package net.minecraft.commands.builder;
 import net.minecraft.commands.tree.LiteralCommandNode;
 import org.junit.Before;
 import org.junit.Test;
+import org.mockito.Mock;
 
 import static net.minecraft.commands.arguments.IntegerArgumentType.integer;
 import static net.minecraft.commands.builder.RequiredArgumentBuilder.argument;
@@ -12,6 +13,8 @@ import static org.junit.Assert.assertThat;
 
 public class LiteralArgumentBuilderTest {
     LiteralArgumentBuilder builder;
+    @Mock
+    Runnable executor;
 
     @Before
     public void setUp() throws Exception {
@@ -25,6 +28,14 @@ public class LiteralArgumentBuilderTest {
         assertThat(node.getLiteral(), is("foo"));
     }
 
+    @Test
+    public void testBuildWithExecutor() throws Exception {
+        LiteralCommandNode node = builder.executes(executor).build();
+
+        assertThat(node.getLiteral(), is("foo"));
+        assertThat(node.getExecutor(), is(executor));
+    }
+
     @Test
     public void testBuildWithChildren() throws Exception {
         builder.then(argument("bar", integer()));

src/main/test/net/minecraft/commands/builder/RequiredArgumentBuilderTest.java

@@ -15,6 +15,7 @@ import static org.junit.Assert.assertThat;
 public class RequiredArgumentBuilderTest {
     @Mock CommandArgumentType<Integer> type;
     RequiredArgumentBuilder<Integer> builder;
+    @Mock Runnable executor;
 
     @Before
     public void setUp() throws Exception {
@@ -29,6 +30,15 @@ public class RequiredArgumentBuilderTest {
         assertThat(node.getType(), is(type));
     }
 
+    @Test
+    public void testBuildWithExecutor() throws Exception {
+        ArgumentCommandNode<Integer> node = builder.executes(executor).build();
+
+        assertThat(node.getName(), is("foo"));
+        assertThat(node.getType(), is(type));
+        assertThat(node.getExecutor(), is(executor));
+    }
+
     @Test
     public void testBuildWithChildren() throws Exception {
         builder.then(argument("bar", integer()));