public void ShouldAddMultipleTimesToItemQuantity(int first, int second, int expected)
{
// Arrange
var orderItem = new OrderItem(DefaultProductId, DefaultProductName, DefaultPrice);
// Act
orderItem.AddQuantity(first);
orderItem.AddQuantity(second);
// Assert
Equal(expected, orderItem.Quantity);
}
public void ShouldIncreaseDefaultItemQuantityByTheFactorThatIsPassed(int quantity, int expected)
{
// Arrange
var orderItem = new OrderItem(DefaultProductId, DefaultProductName, DefaultPrice);
// Act
orderItem.AddQuantity(quantity);
// Assert
Equal(expected, orderItem.Quantity);
}
public void GivenOrderItem_WhenTheQuantityIsAdding_IsSuccessful(int initQuantity, int quantityToAdd)
{
// Arrange
var orderItem = new OrderItem(Guid.NewGuid(), initQuantity);
// Act
orderItem.AddQuantity(quantityToAdd);
// Assert
Assert.Equal(initQuantity + quantityToAdd, orderItem.Quantity);
}
public void ShouldThrowArgumentExceptionWhenQuantityIsLessThanOrEqualToZero(int quantity)
{
// Arrange
var orderItem = new OrderItem(DefaultProductId, DefaultProductName, DefaultPrice);
// Act
var exception = Throws <ArgumentException>(() => orderItem.AddQuantity(quantity));
// Assert
Equal("Invalid quantity", exception.Message);
Equal(1, orderItem.Quantity);
}
public void GivenOrderItem_WhenTheNegativeQuantityIsAdding_IsFailed(int quantityToAdd)
{
// Arrange
var orderItem = new OrderItem(Guid.NewGuid());
var notification = new Notification();
// Act
orderItem.AddQuantity(quantityToAdd);
orderItem.Validate(notification);
// Assert
Assert.False(orderItem.IsValid);
Assert.True(notification.HasErrors);
}