/// <summary>
/// Tests if the actual DateTime is approximately equal to the
/// expected value within the provided allowed drift value
/// </summary>
/// <param name="continuation">Continuation to operate on</param>
/// <param name="expected">Expected value</param>
/// <param name="comparer"></param>
/// <param name="customMessageGenerator">Generates a custom message to include when
/// this expectation fails</param>
/// <returns></returns>
public static IMore <DateTime> Equal(
this IApproximately <DateTime> continuation,
DateTime expected,
IEqualityComparer <DateTime> comparer,
Func <string> customMessageGenerator)
{
continuation.AddMatcher(actual =>
{
var passed = comparer.Equals(actual, expected);
return(new MatcherResult(passed,
() =>
{
var allowed =
comparer.TryGetPropertyValue <TimeSpan?>(
nameof(EqualWithinTimespan.AllowedDrift));
var message =
$@"Expected {
actual.Stringify()
} to approximately equal {
expected.Stringify()
}";
if (allowed.HasValue)
{
message += $" within a timespan of {allowed}";
}
return FinalMessageFor(() => message,
customMessageGenerator);
}));
});
return(continuation.More());
}
