internal static TValue InContainer <TValue, TData>(
TValue item,
string paremeterName,
Func <ContainerClass <TValue>, TData> toData,
Func <TData, ContainerClass <TValue> > fromData,
Action <TData, TData> isDataEqual)
{
try
{
var container1 = new ContainerClass <TValue>(item);
var containerData1 = toData(container1);
// doing it twice to catch errors when deserializing
var container2 = fromData(containerData1);
FieldAssert.Equal(container1, container2);
var containerXml2 = toData(container2);
isDataEqual(containerData1, containerXml2);
return(container2.Other);
}
catch (Exception e)
{
var message = $" Roundtrip of {paremeterName} in {nameof(ContainerClass<TValue>)} Failed.\r\n" +
" This means there is an error in serialization.\r\n" +
$" If you are implementing {nameof(IXmlSerializable)} check that you handle ReadEndElement properly as it is a common source of bugs.";
throw new AssertException(message, e);
}
}
/// <summary>
/// 1. Places <paramref name="item"/> in a ContainerClass{T} container1
/// 2. Serializes container1
/// 3. Deserializes the containerXml to container2 and does FieldAssert.Equal(container1, container2);
/// 4. Serializes container2
/// 5. Checks XmlAssert.Equal(containerXml1, containerXml2, XmlAssertOptions.Verbatim);
/// </summary>
/// <typeparam name="T">The type of <paramref name="item"/></typeparam>
/// <param name="item">The instance to roundtrip</param>
/// <returns>The serialized and deserialized instance (container2.Other)</returns>
public static T Roundtrip <T>(T item)
{
Roundtripper.Simple(item, nameof(item), ToXml, FromXml <T>);
var roundtripped = Roundtripper.InContainer(
item,
nameof(item),
ToXml,
FromXml <ContainerClass <T> >,
(e, a) => XmlAssert.Equal(e, a, XmlAssertOptions.Verbatim));
FieldAssert.Equal(item, roundtripped);
return(roundtripped);
}
internal static TValue Simple <TValue, TData>(
TValue item,
string paremeterName,
Func <TValue, TData> toData,
Func <TData, TValue> fromData)
{
var data = toData(item);
var roundtripped = fromData(data);
try
{
FieldAssert.Equal(item, roundtripped);
}
catch (Exception e)
{
throw AssertException.CreateFromException(
$"Simple roundtrip failed. Source is not equal to roundtripped.",
e);
}
return(roundtripped);
}