public async Task GenerateLinkIfNoCollisionsFound()
{
_shortLinkGenerator.Setup(f => f.CreateShortLink(It.IsAny <int>())).Returns("ABCD");
_checkExistenceFunction.Setup(f => f(It.IsAny <string>())).ReturnsAsync(false);
var actual = await _collisionResolver.FindSuitableShortLinkAsync();
actual.ShouldBeEquivalentTo("ABCD");
}
public async Task <string> CreateShortLinkAsync(string fullLink, User user)
{
var pattern =
"^(http:\\/\\/www\\.|https:\\/\\/www\\.|http:\\/\\/|https:\\/\\/)?[a-z0-9]+([\\-\\.]{1}[a-z0-9]+)*\\.[a-z]{2,5}(:[0-9]{1,5})?(\\/.*)?$";
if (!Regex.IsMatch(fullLink, pattern))
{
throw new InvalidLinkException();
}
var shortLink = await _collisionResolver.FindSuitableShortLinkAsync();
await _shortLinksRepository.InsertAsync(new ShortLink(shortLink, fullLink, user));
return(shortLink);
}
