Насмешка в юнит-тестах

В  строке 6  мы назвали  buy() метод  ProductService проверки. В  строке 7 мы убедились, что orderProduct() метод  ProductDao фиктивного get вызывается с ожидаемым набором параметров (которые мы передали  buy()).

Наш тест пройден. Но еще не завершено. Мы также хотим проверить:

• Число вызовов, выполненных для метода :  метод buy ()  вызывает  getAvailableProduct ()  хотя бы один раз.
• Последовательность вызова :   метод buy () сначала вызывает  getAvailableProduct () , а затем  orderProduct () .
• Проверка исключения :   метод buy () завершается неудачно с  InsufficientProductsException,  если переданное ему количество заказа превышает доступное количество, возвращаемое  getAvailableProduct () .
• Поведение во время исключения :   метод buy () не вызывает  orderProduct (),  когда создается исключение InsufficientProductsException  .

Вот полный тестовый код.

ProductServiceTest.java

package guru.springframework.unittest.mockito;


import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;
import static org.mockito.Mockito.*;
import org.mockito.Mock;

public class ProductServiceTest {
    private ProductService productService;
    private ProductDao productDao;
    private Product product;
    private int purchaseQuantity = 15;

    @Before
    public void setupMock() {
        productService = new ProductService();
        product = mock(Product.class);
        productDao = mock(ProductDao.class);
        productService.setProductDao(productDao);
    }

    @Test
    public void testBuy() throws InsufficientProductsException {
        int availableQuantity = 30;
        System.out.println("Stubbing getAvailableProducts(product) to return " + availableQuantity);
        when(productDao.getAvailableProducts(product)).thenReturn(availableQuantity);
        System.out.println("Calling ProductService.buy(product," + purchaseQuantity + ")");
        productService.buy(product, purchaseQuantity);
        System.out.println("Verifying ProductDao(product, " + purchaseQuantity + ") is called");
        verify(productDao).orderProduct(product, purchaseQuantity);
        System.out.println("Verifying getAvailableProducts(product) is called at least once");
        verify(productDao, atLeastOnce()).getAvailableProducts(product);
        System.out.println("Verifying order of method calls on ProductDao: First call getAvailableProducts() followed by orderProduct()");
        InOrder order = inOrder(productDao);
        order.verify(productDao).getAvailableProducts(product);
        order.verify(productDao).orderProduct(product, purchaseQuantity);



    }

    @Test(expected = InsufficientProductsException.class)
    public void purchaseWithInsufficientAvailableQuantity() throws InsufficientProductsException {
        int availableQuantity = 3;
        System.out.println("Stubbing getAvailableProducts(product) to return " + availableQuantity);
        when(productDao.getAvailableProducts(product)).thenReturn(availableQuantity);
        try {
            System.out.println("productService.buy(product" + purchaseQuantity + ") should throw InsufficientProductsException");
            productService.buy(product, purchaseQuantity);
        } catch (InsufficientProductsException e) {
            System.out.println("InsufficientProductsException has been thrown");
            verify(productDao, times(0)).orderProduct(product, purchaseQuantity);
            System.out.println("Verified orderProduct(product, " + purchaseQuantity + ") is not called");
            throw e;
        }
    }

}

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 T E S T S
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Running guru.springframework.unittest.mockito.ProductServiceTest
Stubbing getAvailableProducts(product) to return 30
Calling ProductService.buy(product,15)
Verifying ProductDao(product, 15) is called
Verifying getAvailableProducts(product) is called at least once
Verifying order of method calls on ProductDao: First call getAvailableProducts() followed by orderProduct()
Stubbing getAvailableProducts(product) to return 3
productService.buy(product15) should throw InsufficientProductsException 
InsufficientProductsException has been thrown
Verified orderProduct(product, 15) is not called
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.077 sec