private static Duplicate?FirstDuplicate(INameSource source, int cycles)
{
var results = new Dictionary <string, int>();
foreach (var cycle in Enumerable.Range(0, cycles))
{
var name = source.Next();
if (results.ContainsKey(name))
{
return(new Duplicate
{
Value = name,
FirstCycle = results[name],
LastCycle = cycle
});
}
results.Add(name, cycle);
}
return(null);
}
public string Next()
{
return(_prefix + _source.Next());
}
public void Has_Expected_Length()
{
var name = _nameSource.Next();
name.Length.ShouldBe(Prefix.Length + Digits);
}
public string Next()
{
return(_source.Next() + _suffix);
}