James Carr

Been tinkering with the 1.8 release of Mockito and found an interesting new feature: support for a Behavior Driven Development syntax.

It’s pretty exciting the readable tests you can create with this new subclass. Here’s a quick example I whipped up during my Mockito presentation today:

package org.jamescarr.MockitoDemo.bdd;

import static org.junit.Assert.assertThat;
import static org.mockito.BDDMockito.given;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.jamescarr.MockitoDemo.stubs.Bar;
import org.jamescarr.MockitoDemo.stubs.Bartender;
import org.jamescarr.MockitoDemo.stubs.Drink;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
@RunWith(MockitoJUnitRunner.class)
public class BarSpec {
	@Mock Bartender bartender;

	private Bar bar;

	@Before
	public void before(){
		bar = new Bar(bartender);
	}
	@Test
	public void shouldGiveMeADrinkWhenIWalkIn(){
		given(bartender.askForRandomDrink()).willReturn(Drink.MOJITO);

		Drink drink = bar.buyDrink();

		assertThat(drink, isMojito());
	}

	private Matcher isMojito() {
		return new IsMojito();
	}

}

class IsMojito extends BaseMatcher{
	public boolean matches(Object item) {
		return "BACARDI MOJITO".equals(((Drink)item).getType());
	}

	public void describeTo(Description description) {
		description.appendText("This drink is not a mojito");
	}
}