@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;
}
}