/// <summary>
/// Helper method. If the parameter type is contained in <see cref="ExpectedConversions"/>,
/// converts the specified values to that type and asserts that the attribute produces those
/// exact values. Otherwise, asserts that a type coercion exception is thrown.
/// </summary>
public void AssertCoercionErrorOrMatchingSequence(Type parameterType, IEnumerable valuesToConvert)
{
var param = StubParameterInfo.OfType(parameterType);
if (ExpectedConversions.Contains(parameterType))
{
// Important: do not use conversion procedure from NUnit framework. That is part of the system
// under test. This conversion procedure must be dead simple, no more than a wrapper over
// new byte[] { 1, 2, 3 }, new sbyte { 1, 2, 3 }, etc.
var convertedValues = valuesToConvert.Cast <object>().Select(value => Convert.ChangeType(value, parameterType));
Assert.That(Attribute.GetData(null, param),
Is.EqualTo(convertedValues).AsCollection.Using((IEqualityComparer)EqualityComparer <object> .Default));
}
else
{
Assert.That(() => Attribute.GetData(null, param),
Throws.Exception.Message.Contains("cannot be passed to a parameter of type"));
}
}
private static object[] GetData(RangeAttribute rangeAttribute, Type parameterType)
{
return(rangeAttribute.GetData(null, StubParameterInfo.OfType(parameterType)).Cast <object>().ToArray());
}
