public void TestProductErrorsChanged()
{
const decimal validValue = 5M;
const decimal invalidValue = -5M;
// Create a product with valid data
var product = new Product(Guid.NewGuid(), "Test", validValue);
// Check that no errors are reported
Assert.IsFalse(product.HasErrors);
Assert.IsTrue(string.IsNullOrEmpty(
product.GetErrors(null).Cast<string>().First()));
// Change product to invalid content and validate if
// events are properly raised
product.CheckIf(p => p.CostsPerItem = invalidValue)
.Raised(nameof(Product.CostsPerItem))
.RaisedErrorsChanged(nameof(Product.CostsPerItem));
// Check if error status is reported
Assert.IsTrue(product.HasErrors);
Assert.IsFalse(string.IsNullOrEmpty(
product.GetErrors(null).Cast<string>().First()));
Assert.IsFalse(string.IsNullOrEmpty(
product.GetErrors(nameof(Product.CostsPerItem)).Cast<string>().First()));
Assert.IsTrue(string.IsNullOrEmpty(
product.GetErrors(nameof(Product.Description)).Cast<string>().First()));
// Call setter with identical value and check that events
// are not raised
product.CheckIf(p => p.CostsPerItem = p.CostsPerItem)
.DidNotRaise(nameof(Product.CostsPerItem))
.DidNotRaiseErrorsChanged(nameof(Product.CostsPerItem));
// Call setter with valid value and check that events
// are properly raised.
product.CheckIf(p => p.CostsPerItem = validValue)
.Raised(nameof(Product.CostsPerItem))
.RaisedErrorsChanged(nameof(Product.CostsPerItem));
// Check error status has been set to OK
Assert.IsFalse(product.HasErrors);
Assert.IsTrue(string.IsNullOrEmpty(
product.GetErrors(null).Cast<string>().First()));
}
public void TestProductDictionary()
{
const int numberOfPartsInP = 10;
var pRoot = new Product(Guid.NewGuid(), "Test", 10M);
Product p;
// Note the new dictionary initializers here
var dict = new Dictionary<Product, Tuple<Guid, int>>()
{
[new Product(Guid.NewGuid(), "Test2", 20M)] = new Tuple<Guid, int>(pRoot.ProductID, 5),
[p = new Product(Guid.NewGuid(), "Test3", 30M)] = new Tuple<Guid, int>(pRoot.ProductID, numberOfPartsInP),
[new Product(Guid.NewGuid(), "Test4", 40M)] = new Tuple<Guid, int>(pRoot.ProductID, 15)
};
// Just for fun, let's change p's description
p.Description = "Subproduct";
Assert.AreEqual(numberOfPartsInP, dict[p].Item2);
}
public void TestProductPropertyChanged()
{
var product = new Product();
// Check if events are raised
product.CheckIf(p =>
{
p.ProductID = Guid.NewGuid();
p.Description = "Test";
p.CostsPerItem = 99.99M;
})
.Raised(nameof(Product.ProductID))
.Raised(nameof(Product.Description))
.Raised(nameof(Product.CostsPerItem))
.DidNotRaise(nameof(Product.Parts));
// Check that no events are raised if value did not change
product.CheckIf(p => p.CostsPerItem = p.CostsPerItem)
.DidNotRaise(nameof(Product.CostsPerItem));
}
