TickProviderTest.java

import org.junit.*;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import static org.mockito.AdditionalMatchers.*;
 
import org.mockito.InOrder;
 
public class TickProviderTest {
 
    @Test
    public void shouldNotifyTickWhenStarted() {
        RouletteWheel rouletteWheel = mock(RouletteWheel.class);
        TickProvider tickProvider = new TickProvider(rouletteWheel);
        
        tickProvider.start();
 
        verify(rouletteWheel, timeout(150).atLeastOnce()).tick(anyInt());
    }
    
    @Test
    public void shouldNotifyTickEvery100ms() throws Exception {
        RouletteWheel rouletteWheel = mock(RouletteWheel.class);
        TickProvider tickProvider = new TickProvider(rouletteWheel);
        
        tickProvider.start();
        
        verify(rouletteWheel, timeout(500).atLeast(5)).tick(anyInt());
    }
 
    
    @Test
    public void shouldIncrementEachTickByApprox100() throws Exception {
        RouletteWheel rouletteWheel = mock(RouletteWheel.class);
        TickProvider tickProvider = new TickProvider(rouletteWheel);
        InOrder inOrder = inOrder(rouletteWheel, 
                                  rouletteWheel,
                                  rouletteWheel);
        
        tickProvider.start();
        
        Thread.sleep(200);
 
        inOrder.verify(rouletteWheel)
                .tick(and(gt((long)0), lt((long)20)));
 
        inOrder.verify(rouletteWheel)
                .tick(and(gt((long)90), lt((long)120)));
 
        inOrder.verify(rouletteWheel)
                .tick(and(gt((long)190), lt((long)220)));
 
    }
}