### Question:
HintCommand implements Command { @Override public Usage usage() { return new Usage("hint"); } HintCommand(Shell shell); @Override String name(); @Override Usage usage(); @Override void run(Line line);  }### Answer:
@Test public void testUsage() { HintCommand command = new HintCommand(new Shell()); Usage usage = command.usage(); assertThat(usage.synopsis(), is("hint")); assertThat(usage.options().size(), is(0)); }