linq-mock.cs

[Fact]
public void LinqToMocks()
{
    //Arrange
    IValidator mockValidator
        = Mock.Of<IValidator>
        (
            validator =>            
            validator.IsValid(It.IsAny<string>()) == true
        );
    var sut = new CreditApplicationEvaluator(mockValidator);
    var application = new CreditApplication { MonthlyIncome = 5000 };
    
    //Act
    CreditApplicationDecision decision = sut.Evaluate(application);
    
    //Assert
    Assert.Equal(CreditApplicationDecision.AutoDeclined, decision);
}