public Task <NutrientsListViewModel> ListAll()
{
var query = new ListNutrients(ExpressionTemplates.AllExpression <Nutrient>());
var handlerTask = this.listNutrientsHandler.HandleQueryAsync(query);
return(handlerTask
.ContinueWith(antecedent => new NutrientsListViewModel(antecedent.Result)));
}
public Task <IEnumerable <Nutrient> > HandleQueryAsync(ListNutrients query)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
return(this.repository.FindAsync(query.Filter));
}
public static async Task Main(string[] args)
{
var repository = new NutrientRepository();
var commandHandler = new CreateNutrientHandler(repository);
var command = new CreateNutrient("Vitamin D");
await commandHandler.HandleCommandAsync(command);
var queryHandler = new ListNutrientsHandler(repository);
var query = new ListNutrients(o => o.Title == "Vitamin D");
var result = await queryHandler.HandleQueryAsync(query);
System.Console.ReadKey();
}
public async Task HandleQueryAsync_WithValidArgs_ReturnsListOfNutrients()
{
// Arrange
var allExpression = ExpressionTemplates.AllExpression <Nutrient>();
var query = new ListNutrients(allExpression);
const int nutrientsCount = 3;
var nutrients = GetFakeNutrients(nutrientsCount);
A.CallTo(() => this.repository.FindAsync(allExpression))
.Returns(Task.FromResult(nutrients));
// Act
var result = await this.sut.HandleQueryAsync(query);
// Assert
result.Should().NotBeNull();
result.Should().NotBeEmpty();
A.CallTo(() => this.repository.FindAsync(allExpression))
.MustHaveHappenedOnceExactly();
}