public static IAssert <Result> Fullfills(
this IAssert <Result> instance,
bool succeeded,
string log,
string expectation)
{
IAssertValue <bool> succeededAssertion = succeeded ? (IAssertValue <bool>) new IsTrueAssertion() : new IsFalseAssertion();
return(instance.p(x => x.succeeded).SetAssertion(succeededAssertion)
.p(x => x.actual).IsEqualTo(log)
.p(x => x.expectation).IsEqualTo(expectation));
}