public void ChangeType_ReturnsNullIfTypeAllowsNulls()
{
// Act
var actual = CommandLineUtility.ChangeType(null, typeof(int?));
// Assert
Assert.IsNull(actual);
}
public void ChangeType_ReturnsConvertedTypeWhenThereIsAConverterFromTheType()
{
// Act
var actual = CommandLineUtility.ChangeType("3", typeof(int));
// Assert
Assert.AreEqual(typeof(int), actual.GetType());
Assert.AreEqual(3, actual);
}
public void ChangeType_ReturnsValueIfTypesMatch()
{
// Act
var actual = CommandLineUtility.ChangeType(3, typeof(int));
// Assert
Assert.AreEqual(typeof(int), actual.GetType());
Assert.AreEqual(3, actual);
}
public void ChangeType_ThrowsIfTypeDoesNotAllowNulls()
{
// Act & Assert
ExceptionAssert.Throws <InvalidCastException>(() => CommandLineUtility.ChangeType(null, typeof(int)));
}
public void ChangeType_ThrowsIfTypeIsNull()
{
// Act & Assert
ExceptionAssert.ThrowsArgNull(() => CommandLineUtility.ChangeType(new object(), null), "type");
}
public void ChangeType_ThrowWhenThereIsNoConverterForEither()
{
// Act & Assert
ExceptionAssert.Throws <InvalidOperationException>(() => CommandLineUtility.ChangeType(false, typeof(MockClass)));
}