public async Task UserExists_UserDoesNotExist_ReturnsFalse(int id, int numAccounts, string namePrefix, int startingId,
int idIncrementFactor)
{
// Arrange
// Setting up each dependency of ValidationService as a Mock
Mock <IUserProfileService> mockProfileService = new Mock <IUserProfileService>();
Mock <IUserAccountService> mockAccountService = new Mock <IUserAccountService>();
List <WebUserAccountModel> userAccounts = new List <WebUserAccountModel>();
// Test helper to assist in instantiating a list of WebUserAccountModels
var testHelper = new BusinessLayerTestHelper();
/* Parameters:
* numAccounts: How many would you like to generate?
* namePrefix: What would you like to be the common prefix before every attribute?
* startingId: What number would you like id to start from?
* idIncrementFactor: How many numbers would you like each subsequent id to skip by?
*/
userAccounts = testHelper.PopulateListOfAccountModels(numAccounts, namePrefix, startingId, idIncrementFactor);
// This function reads as: If GetAllUserAccounts is called, then return a list of userAccounts
mockAccountService.Setup(x => x.GetAllUserAccounts()).Returns(Task.FromResult(userAccounts));
// Finally, instantiate the actual class being tested and pass in the mock objects
IValidationService validationService = new ValidationService(mockAccountService.Object, mockProfileService.Object);
// Act
// Call the function that is being tested
var actualResult = await validationService.UserExists(id);
// Assert
// This unit test will pass if it returns false
Assert.IsFalse(actualResult);
}