public void GenerateSlug_Appends_number_to_text_if_original_text_slugged_exists_Starting_at_supplied_seed_value()
{
//Arrange
var slugGenerator = new SlugGenerator(new SlugGeneratorOptions {
IterationSeedValue = 3
}, _fakeSlugStore, _fakeSlugAlgorithm); //start at 3
A.CallTo(() => _fakeSlugAlgorithm.Slug("Some text"))
.Returns("some-text");
A.CallTo(() => _fakeSlugStore.Exists("some-text"))
.Returns(true);
A.CallTo(() => _fakeSlugAlgorithm.Slug("Some text 3"))
.Returns("some-text-3");
//Act
var result = slugGenerator.GenerateSlug("Some text");
//Assert
Assert.That(result, Is.EqualTo("some-text-3"));
A.CallTo(() => _fakeSlugAlgorithm.Slug("Some text 1"))
.MustNotHaveHappened();
A.CallTo(() => _fakeSlugAlgorithm.Slug("Some text 2"))
.MustNotHaveHappened();
}
public string GenerateSlug(string text, string[] uniquifiers = null)
{
var initialSlug = _slugAlgorithm.Slug(text);
//we might get lucky on first try
if (!_slugStore.Exists(initialSlug))
{
_slugStore.Store(new Slug(initialSlug));
return(initialSlug);
}
//if we've got uniquifiers, iterate them
if (uniquifiers != null && uniquifiers.Any())
{
string slugWithUniquifier = null;
var uniquifierIterationIndex = 0;
while (string.IsNullOrEmpty(slugWithUniquifier) && uniquifierIterationIndex < uniquifiers.Length)
{
var uniquifier = uniquifiers.ElementAt(uniquifierIterationIndex);
slugWithUniquifier = _slugAlgorithm.Slug(text + " " + uniquifier);
if (_slugStore.Exists(slugWithUniquifier))
{
slugWithUniquifier = null;
}
uniquifierIterationIndex++;
}
//we couldn't generate a unique slug with any of the uniquifiers supplied
//so now use the first uniquifier in the list, and append an incremental number until we find the unique
if (string.IsNullOrEmpty(slugWithUniquifier))
{
return(GenerateAndStoreSlugWithIncrementedNumberAppendage(text + " " + uniquifiers.First()));
}
_slugStore.Store(new Slug(slugWithUniquifier));
return(slugWithUniquifier);
}
//no uniquifiers so add number on the end until we find a unique value
return(GenerateAndStoreSlugWithIncrementedNumberAppendage(text));
}
public void GenerateSlug_Checks_SlugStore_for_existing_slug()
{
A.CallTo(() => _fakeSlugAlgorithm.Slug("Some text"))
.Returns("some-text");
var result = _slugGenerator.GenerateSlug("Some text");
A.CallTo(() => _fakeSlugStore.Exists("some-text"))
.MustHaveHappened();
}