public UrlShortener(string baseUrl, IAliasRepository repository, IHashScheme hashScheme, IUrlUnwrapper urlUnwrapper)
{
BaseUrl = baseUrl;
Repository = repository;
HashScheme = hashScheme;
UrlUnwrapper = urlUnwrapper;
ProtectedPaths = new string[] {};
}
private static void ShouldHonorLengthPreference(IHashScheme scheme, string name)
{
for (int i = 1; i <= 32; i++)
{
scheme.LengthPreference = i;
scheme.GetKey("some long rambling string that is significantly longer than the expected hash value")
.Should().HaveLength(i, "{0} should honor length preference", name);
}
}
private static void ShouldMeetBasicHashRequirements(IHashScheme scheme, string name)
{
for (int i = 0; i < 2048; i++)
{
var s = i.ToString();
scheme.GetKey(s)
.Should().HaveLength(scheme.LengthPreference)
.And.NotContain("/")
.And.NotContain("+")
.And.NotBe(scheme.GetKey(s, 1),
"{0} should permute hash", name);
var alternates = Enumerable.Range(0, 32).Select(j => scheme.GetKey(s, j));
alternates.Should().OnlyHaveUniqueItems(
"{0} should return unique hashes", name);
}
}
private void PrintExamples(IHashScheme scheme, string name)
{
Console.WriteLine(name);
Console.WriteLine(new String('=', name.Length));
var examples = new[]
{
"a", "b", "c",
"cat", "dog", "fish",
"the quick brown fox jumped over the lazy dog",
"http://example.com"
};
foreach (var example in examples)
{
Console.WriteLine("{0} => {1}", example, scheme.GetKey(example));
}
Console.WriteLine();
}
public UrlShortener(string baseUrl, IAliasRepository repository, IHashScheme hashScheme)
: this(baseUrl, repository, hashScheme, new WebClientUrlUnwrapper())
{
}
private static void ShouldHaveDefaultLengthPreference(IHashScheme scheme, string name)
{
scheme.LengthPreference.Should().BeGreaterThan(0,
"{0} should have a default LengthPreference", name);
}
