public void AuthenticateUser_WithInvalidUsernamePassword_ReturnsZero()
{
// Arrange
var service = new AccountService(_users.Object);
// Act
var result = service.AuthenticateUser("invalid", "invalid");
// Assert
Assert.That(result, Is.EqualTo(0));
}
public void AuthenticateUser_WithMultipleUsernamePassword_ThrowsException()
{
// Arrange
_users.Setup(u => u.AuthenticateUser(It.IsAny<string>(), It.IsAny<string>())).Throws
<InvalidOperationException>();
var service = new AccountService(_users.Object);
// Act
var ex = Assert.Throws<InvalidOperationException>(() => service.AuthenticateUser(It.IsAny<string>(), It.IsAny<string>()));
// Assert
Assert.That(ex.Message, Is.EqualTo("Operation is not valid due to the current state of the object."));
}
public void AuthenticateUser_WithValidUsernamePassword_ReturnsUserId()
{
// Arrange
const string username = "******";
const string password = "******";
const int userId = 1;
var service = new AccountService(_users.Object);
_users.Setup(u => u.AuthenticateUser(username, password)).Returns(userId);
// Act
var result = service.AuthenticateUser(username, password);
// Assert
Assert.That(result, Is.EqualTo(userId));
}