public void ShouldThrow_WhenGuidIdParameterIsEmpty()
{
//Arrange
var dataMock = new Mock <IHomeMadeFoodData>();
var foodCategoriesServiceMock = new Mock <IFoodCategoriesService>();
IngredientsService ingredientsService = new IngredientsService(dataMock.Object, foodCategoriesServiceMock.Object);
//Act&Assert
Assert.Throws <ArgumentException>(() => ingredientsService.GetIngredientById(Guid.Empty));
}
public void ReturnsNull_WhenIdIsValidButThereIsNoSuchIngredientInDatabase()
{
//Arrange
var dataMock = new Mock <IHomeMadeFoodData>();
var foodCategoriesServiceMock = new Mock <IFoodCategoriesService>();
IngredientsService ingredientsService = new IngredientsService(dataMock.Object, foodCategoriesServiceMock.Object);
Guid ingredientId = Guid.NewGuid();
dataMock.Setup(c => c.Ingredients.GetById(ingredientId)).Returns <Ingredient>(null);
//Act
Ingredient ingredientResult = ingredientsService.GetIngredientById(ingredientId);
//Assert
Assert.IsNull(ingredientResult);
}
public void ReturnIngredient_WhenIdIsValid()
{
//Arrange
var dataMock = new Mock <IHomeMadeFoodData>();
var foodCategoriesServiceMock = new Mock <IFoodCategoriesService>();
IngredientsService ingredientsService = new IngredientsService(dataMock.Object, foodCategoriesServiceMock.Object);
Guid ingredientId = Guid.NewGuid();
Ingredient ingredient = new Ingredient()
{
Id = ingredientId, Name = "IngredientName", PricePerMeasuringUnit = 12.60m, QuantityInMeasuringUnit = 0
};
dataMock.Setup(c => c.Ingredients.GetById(ingredientId)).Returns(ingredient);
//Act
Ingredient ingredientResult = ingredientsService.GetIngredientById(ingredientId);
//Assert
Assert.AreSame(ingredient, ingredientResult);
}