public override void Verify(Type type)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
var method = type
.GetMethods()
.SingleOrDefault(candidate =>
candidate.Name == "op_Implicit" &&
candidate.GetParameters().Length == 1 &&
candidate.GetParameters()[0].ParameterType == type &&
candidate.ReturnParameter.ParameterType == typeof(TResult));
if (method == null)
{
throw new ImplicitConversionOperatorException(type, typeof(TResult),
$"The type '{type.Name}' does not define an implicit conversion operator to type '{typeof(TResult).Name}'.");
}
var value = Builder.Create <TResult>();
var builder = new CompositeSpecimenBuilder(
new FrozenSpecimenBuilder <TResult>(value),
Builder
);
var instance = builder.CreateAnonymous(type);
object result;
try
{
result = method.Invoke(null, new[] { instance });
}
catch (Exception exception)
{
throw new ImplicitConversionOperatorException(type, typeof(TResult),
$"The implicit conversion operator to type '{typeof(TResult).Name}' of type '{type.Name}' threw an exception.", exception);
}
if (!((TResult)result).Equals(value))
{
throw new ImplicitConversionOperatorException(type, typeof(TResult));
}
}
public override void Verify(Type type)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
var method = type
.GetMethods()
.SingleOrDefault(candidate =>
candidate.Name == "To" + typeof(TResult).Name &&
candidate.GetParameters().Length == 0 &&
candidate.ReturnParameter.ParameterType == typeof(TResult));
if (method == null)
{
throw new ExplicitConversionMethodException(type, typeof(TResult),
$"The type '{type.Name}' does not define an explicit conversion method to type '{typeof(TResult).Name}' called 'To{typeof(TResult).Name}()'.");
}
var value = Builder.Create <TResult>();
var builder = new CompositeSpecimenBuilder(
new FrozenSpecimenBuilder <TResult>(value),
Builder
);
var instance = builder.CreateAnonymous(type);
try
{
var result = (TResult)method.Invoke(instance, new object[0]);
if (!result.Equals(value))
{
throw new ExplicitConversionMethodException(type, typeof(TResult));
}
}
catch (Exception exception)
{
throw new ImplicitConversionOperatorException(type, typeof(TResult),
$"The explicit conversion method to type '{typeof(TResult).Name}' of type '{type.Name}' threw an exception.", exception);
}
}
