public void IsValidReturnsFalseWhenGivenObjectToValidateIsNull()
{
IValidationRule <string> rule = new CannotBeNullRule <string, string>(s => "Bob", string.Empty);
bool isValid = rule.IsValid(null);
Assert.IsFalse(isValid, "Null object returned true.");
}
public void GetErrorMessageReturnsStringWithTypeAndPropertyName()
{
const string expectedPropertyName = "String";
string expectedString = string.Format("{0} must be provided.", expectedPropertyName);
var rule = new CannotBeNullRule <string, string>(s => s, expectedPropertyName);
Assert.AreEqual(expectedString, rule.GetErrorMessage(string.Empty));
}
public void IsValidReturnsWhetherOrNotTheGivenPropertyIsNull()
{
IValidationRule <string> rule = new CannotBeNullRule <string, string>(s => s, string.Empty);
bool isValid = rule.IsValid(string.Empty);
bool isNullValid = rule.IsValid(null);
Assert.IsTrue(isValid);
Assert.IsFalse(isNullValid);
}
