public void Create_WithEmptyTitle_Throws()
{
//Arrange
const string title = "";
Action run = () => Nutrient.Create(title);
//Act
//Assert
run.Should().ThrowExactly <ArgumentException>()
.Where(e => e.Message.Contains(nameof(title)));
}
public void ChangeTitle_WithEmptyTitle_Throws()
{
// Arrange
var nutrient = Nutrient.Create(this.fixture.Create <string>());
var newTitle = string.Empty;
// Act
Action run = () => nutrient.ChangeTitle(newTitle);
// Assert
run.Should().ThrowExactly <ArgumentException>()
.Where(e => e.Message.Contains("newTitle"));
}
public void ChangeTitle_WithValidArgs_ChangesTitle()
{
// Arrange
var newTitle = this.fixture.Create <string>();
var oldTitle = this.fixture.Create <string>();
var nutrient = Nutrient.Create(oldTitle);
// Act
nutrient.ChangeTitle(newTitle);
// Assert
nutrient.Title.Should().BeEquivalentTo(newTitle);
}
public void Create_WithValidParams_CreatesNewInstance()
{
//Arrange
var title = new Fixture().Create <string>();
//Act
var instance = Nutrient.Create(title);
//Assert
instance.Should().NotBeNull();
instance.Title.Should().Be(title);
instance.NutrientId.Should().NotBe(Guid.Empty);
}
public async Task HandleQueryAsync_WithValidParams_ReturnsNutrient()
{
// Arrange
var id = new Fixture().Create <Guid>();
var query = new GetNutrientDetails(id);
var fakeNutrient = Nutrient.Create(new Fixture().Create <string>());
A.CallTo(() => this.repository.GetOneByKeyAsync(id))
.Returns(fakeNutrient);
// Act
var result = await this.sut.HandleQueryAsync(query);
// Assert
result.Should().NotBeNull();
A.CallTo(() => this.repository.GetOneByKeyAsync(id))
.MustHaveHappenedOnceExactly();
}
public async Task HandleCommandAsync(CreateNutrient command)
{
if (command is null)
{
throw new ArgumentNullException(nameof(command));
}
var nutrient = await this.repository.FindOneAsync(n => n.Title.Equals(command.Title));
if (nutrient != null)
{
throw new InvalidOperationException($"Nutrient with the title {nutrient.Title} already exists");
}
nutrient = Nutrient.Create(command.Title);
await this.repository.InsertOneAsync(nutrient);
}
public void HandleCommandAsync_WithExistingNutrient_Throws()
{
// Arrange
var nutrientTitle = new Fixture().Create <string>();
var fakeNutrient = Nutrient.Create(nutrientTitle);
var command = new CreateNutrient(nutrientTitle);
A.CallTo(() => this.repository.FindOneAsync(A <Expression <Func <Nutrient, bool> > > .Ignored))
.Returns(fakeNutrient);
// Act
Func <Task> run = async() => await this.sut.HandleCommandAsync(command);
// Assert
run.Should().ThrowExactly <InvalidOperationException>()
.WithMessage($"Nutrient with the title {nutrientTitle} already exists");
A.CallTo(() => this.repository.FindOneAsync(A <Expression <Func <Nutrient, bool> > > .Ignored))
.MustHaveHappenedOnceExactly();
}
public async Task HandleCommandAsync_WithValidArgs_UpdatesNutrientTitle()
{
// Arrange
var id = this.fixture.Create <Guid>();
var newTitle = this.fixture.Create <string>();
var oldTitle = this.fixture.Create <string>();
var command = new UpdateNutrientTitle(id, newTitle);
var fakeNutrient = Nutrient.Create(oldTitle);
A.CallTo(() => this.repository.GetOneByKeyAsync(id))
.Returns(fakeNutrient);
// Act
await this.sut.HandleCommandAsync(command);
// Assert
A.CallTo(() => this.repository.GetOneByKeyAsync(id))
.MustHaveHappenedOnceExactly();
A.CallTo(() => this.repository.SaveOneAsync(fakeNutrient))
.MustHaveHappenedOnceExactly();
fakeNutrient.Title.Should().BeEquivalentTo(newTitle);
}
private static Nutrient CreteFakeNutrient()
{
return(Nutrient.Create(new Fixture().Create <string>()));
}
public void ChangeTitle_WithNullTitle_Throws()
{
// Arrange
var nutrient = Nutrient.Create(this.fixture.Create <string>());
const string newTitle = default !;
private static IEnumerable <Nutrient> GetFakeNutrients(int nutrientsCount)
{
return(Enumerable
.Range(0, nutrientsCount)
.Select(i => Nutrient.Create(new Fixture().Create <string>())));
}