public void IsValidOperator_InvalidOperator_ReturnFalse(string value)
{
IValidator sut = new OperatorValidator();
bool isValid = sut.IsValid <string>(value);
Assert.False(isValid);
}
public void IsValidOperator_IfNullOperator_ThrowException(string value)
{
IValidator sut = new OperatorValidator();
var ex = Assert.Throws <ArgumentNullException>(() => sut.IsValid(value));
}