public void IsValid()
{
var attribute = new MustBeNullOrEmptyAttribute();
Assert.AreEqual(true, attribute.IsValid(null));
Assert.AreEqual(true, attribute.IsValid(DBNull.Value));
Assert.AreEqual(true, attribute.IsValid(string.Empty));
Assert.AreEqual(false, attribute.IsValid("aaa"));
Assert.AreEqual(true, attribute.IsValid(Array.Empty <string>()));
Assert.AreEqual(false, attribute.IsValid(new string[] { "aaa" }));
Assert.AreEqual(true, attribute.IsValid(Array.Empty <int>()));
Assert.AreEqual(false, attribute.IsValid(new int[] { 1 }));
}
public void IsValidFail(object value)
{
var attribute = new MustBeNullOrEmptyAttribute();
try
{
attribute.IsValid(value);
Assert.Fail();
}
catch (ArgumentException ex)
{
Assert.AreEqual("Value must be subtype of IEnumerable.", ex.Message);
}
}