public void SendEmailTestCollectionDictionary()
{
// Arrange
var vendorRepository = new VendorRepository();
var vendorsCollection = vendorRepository.RetrieveCollection();
var expected = new List<string>()
{
"Message sent: Important message for: IBM",
"Message sent: Important message for: GE"
};
// When casting a collection to a dictionary, we must give .ToDictionary()
// a key-selector function argument to extract the keys for the dictionary.
// In this case, we want to use the company name as the key. The lambda
// expression says for every item v in the collection, use the company name
// as the key.
var vendors = vendorsCollection.ToDictionary(v => v.CompanyName);
// Act
var actual = Vendor.SendEmail(vendors.Values, "Test Message");
// Assert
CollectionAssert.AreEqual(expected, actual);
}
public void SendEmailTestCollectionArray()
{
// Arrange
var vendorRepository = new VendorRepository();
var vendorsCollection = vendorRepository.RetrieveCollection();
var expected = new List<string>()
{
"Message sent: Important message for: IBM",
"Message sent: Important message for: GE"
};
// Since .RetrieveCollection() returns an ICollection<Vendor>, we
// must cast it in order for us to use vendorsCollection as an Array.
var vendors = vendorsCollection.ToArray();
Console.WriteLine(vendors.Length);
// Act
var actual = Vendor.SendEmail(vendors, "Test Message");
// Assert
CollectionAssert.AreEqual(expected, actual);
}
public void SendEmailTestCollectionList()
{
// Arrange
var vendorRepository = new VendorRepository();
var vendorsCollection = vendorRepository.RetrieveCollection();
var expected = new List<string>()
{
"Message sent: Important message for: IBM",
"Message sent: Important message for: GE"
};
var vendors = vendorsCollection.ToList();
Console.WriteLine(vendors.Count);
// Act
var actual = Vendor.SendEmail(vendors, "Test Message");
// Assert
CollectionAssert.AreEqual(expected, actual);
}
public void SendEmailTestAdd()
{
// Arrange
var vendorRepository = new VendorRepository();
var vendorsCollection = vendorRepository.RetrieveCollection(); // Collection has 2 items.
vendorsCollection.Add(new Vendor() {CompanyName = "NBC", Email = "*****@*****.**", VendorId = 25});
// The returned collection is MUTABLE, meaning after we add a new vendor to the vendorRepository
// and then retrieve the same collection, that collection would have increased by 1.
var vendorsCollectionMaster = vendorRepository.RetrieveCollection(); // Collection now has 3 items.
// Prevent changes to the collection, .RetrieveCollection() would need to return IEnumerable<T>
// instead of ICollection<T>. IEnumerable<T> collections can only be enumerated, not modified
// because they're readonly.
var expected = new List<string>()
{
"Message sent: Important message for: IBM",
"Message sent: Important message for: GE",
"Message sent: Important message for: NBC",
};
var vendors = vendorsCollection.ToList();
Console.WriteLine(vendors.Count);
// Act
var actual = Vendor.SendEmail(vendors, "Test Message");
// Assert
CollectionAssert.AreEqual(expected, actual);
}
public void RetrieveTestCollection()
{
// Arrange
var repository = new VendorRepository();
var expected = new List<Vendor>();
expected.Add(new Vendor() { CompanyName = "IBM", Email = "*****@*****.**", VendorId = 12345 });
expected.Add(new Vendor() { CompanyName = "GE", Email = "*****@*****.**", VendorId = 54321 });
// Act
var actual = repository.RetrieveCollection();
// Assert
CollectionAssert.AreEqual(expected, actual.ToList());
}
