BeveragesPricingTest.java

package unit_tests;

import beverages.*;
import org.junit.Test;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.closeTo;

public class BeveragesPricingTest {
  private static final double PRECISION = 0.001;

  @Test
  public void computes_coffee_price() {
    Beverage coffee = new Coffee();
    assertThat(coffee.price(), is(closeTo(1.20, PRECISION)));
  }

  @Test
  public void computes_tea_price() {
    Beverage tea = new Tea();
    assertThat(tea.price(), is(closeTo(1.50, PRECISION)));
  }

  @Test
  public void computes_hot_chocolate_price() {
    Beverage hotChocolate = new HotChocolate();
    assertThat(hotChocolate.price(), is(closeTo(1.45, PRECISION)));
  }

  @Test
  public void computes_tea_with_milk_price() {
    Tea teaWithMilk = new TeaWithMilk();
    assertThat(teaWithMilk.price(), is(closeTo(1.60, PRECISION)));
  }

  @Test
  public void computes_coffee_with_milk_price() {
    Coffee coffeeWithMilk = new CoffeeWithMilk();
    assertThat(coffeeWithMilk.price(), is(closeTo(1.30, PRECISION)));
  }

  @Test
  public void computes_coffee_with_milk_and_cream_price() {
    Coffee coffeeWithMilkAndCream = new CoffeeWithMilkAndCream();
    assertThat(coffeeWithMilkAndCream.price(), is(closeTo(1.45, PRECISION)));
  }

  @Test
  public void computes_hot_chocolate_with_cream_price() {
    HotChocolateWithCream hotChocolateWithCream = new HotChocolateWithCream();
    assertThat(hotChocolateWithCream.price(),  is(closeTo(1.60, PRECISION)));
  }
}