public void SendEmailTestArray() { // Arrange var vendorRepository = new VendorRepository(); var vendors = vendorRepository.RetrieveArray(); var expected = new List<string>() { "Message sent: Important message for: Disney", "Message sent: Important message for: Google" }; Console.WriteLine(vendors.Length); // Act var actual = Vendor.SendEmail(vendors, "Test Message"); // Assert CollectionAssert.AreEqual(expected, actual); }