public void IsValid_Should_Throw_Exception_When_Value_Is_Not_String()
{
// Arrange
var attr = new StringValidateAttribute("Test message");
// Act
// Assert
attr.IsValid(5);
}
public void Test_IsValid_Should_Throw_Exception_When_Value_Is_Not_String()
{
// Arrange
var attr = new StringValidateAttribute("Test message");
// Act
// Assert
ExceptionAssert.Throw <InvalidCastException>(
() => attr.IsValid(5));
}
public void Constructor_Should_Set_Default_Values()
{
// Act
var attr = new StringValidateAttribute("Test message");
// Assert
Assert.AreEqual(-1, attr.MinLength);
Assert.AreEqual(-1, attr.MaxLength);
Assert.IsTrue(attr.CanBeEmpty);
Assert.IsTrue(attr.CanBeNull);
Assert.IsNull(attr.RegEx);
}
public void IsValid_Should_Return_False_When_Value_Is_Empty_And_CanBeEmpty_Is_False()
{
// Arrange
var attr = new StringValidateAttribute("Test message")
{
CanBeEmpty = false
};
// Act
bool result = attr.IsValid(string.Empty);
// Assert
Assert.IsFalse(result);
}
public void IsValid_Should_Return_False_When_Value_Is_Greater_Than_MaxLength()
{
// Arrange
var attr = new StringValidateAttribute("Test message")
{
MaxLength = 3
};
// Act
bool result = attr.IsValid("1234");
// Assert
Assert.IsFalse(result);
}
public void IsValid_Should_Return_False_When_Value_Is_Not_Match_Regex()
{
// Arrange
var attr = new StringValidateAttribute("Test message")
{
RegEx = @"^[0-1]$"
};
// Act
bool result = attr.IsValid("2");
// Assert
Assert.IsFalse(result);
}
public void Test_IsValid_Should_Return_False_When_Value_Is_Null_And_CanBeNull_Is_False()
{
// Arrange
var attr = new StringValidateAttribute("Test message")
{
CanBeNull = false
};
// Act
bool result = attr.IsValid(null);
// Assert
Assert.IsFalse(result);
}
public void IsValid_Should_Return_True_When_Value_Is_Null_And_Not_Meet_All_Requirements_Except_CanBeNull()
{
// Arrange
var attr = new StringValidateAttribute("Test message")
{
MinLength = 1,
MaxLength = 3,
CanBeNull = true,
CanBeEmpty = false,
RegEx = @"^[0]$"
};
// Act
bool result = attr.IsValid(null);
// Assert
Assert.IsTrue(result);
}
public void IsValid_Should_Return_True_When_Parameters_Not_Specified()
{
var values =
new[]
{
"",
null,
"1234567890",
"abcdefghjk",
"~!@#$%^&*()_+"
};
foreach (var value in values)
{
// Arrange
var attr = new StringValidateAttribute("Test message");
// Act
bool result = attr.IsValid(value);
// Assert
Assert.IsTrue(result);
}
}
