public void TextWritingSystems_HasAllWritingSystems_ReturnsTextWritingSystems()
{
var ws1 = new WritingSystemDefinition("fr");
ws1.IsVoice = true;
RepositoryUnderTest.Set(ws1);
RepositoryUnderTest.Set(new WritingSystemDefinition("de"));
RepositoryUnderTest.Set(new WritingSystemDefinition("es"));
Assert.IsTrue(RepositoryUnderTest.TextWritingSystems().Count() == 2);
}
public static IEnumerable <string> FilterForTextLanguageTags(this IWritingSystemRepository repo, IEnumerable <string> langTagsToFilter)
{
var set = new HashSet <string>(repo.TextWritingSystems().Select(ws => ws.LanguageTag));
return(langTagsToFilter.Where(set.Contains));
}