CommandDispatcherArgumentNotConsidered.java

// Paste in src/test/java/com/mojang/brigadier/CommandDispatcherTest.java
@SuppressWarnings("unchecked")
@Test
public void testExecuteAmbiguousArgumentImpermissibleLiteral() throws Exception {
    final Command<Object> command = mock(Command.class);
    when(command.run(any())).thenReturn(100);

    subject.register(literal("foo")
        .then(
            literal("bar")
                .requires(source -> false)
        )
        .then(
            argument("argument", StringArgumentType.word())
                .executes(command)
        )
    );

    assertThat(subject.execute("foo bar", source), is(100));
    verify(command).run(any(CommandContext.class));
}