internal void Sets_current_to_first_element_of_source(
[Frozen] IEnumerable <int> source,
[Frozen] InfiniteLoopingEnumerator <int> enumerator)
{
enumerator.MoveNext();
enumerator.Current.Should().Be(source.First());
}
internal void Enumerates_the_source_n_times(
[Frozen] IEnumerable <int> source,
[Frozen] InfiniteLoopingEnumerator <int> enumerator,
int n)
{
var result = enumerator.AsEnumerable()
.Take(source.Count() * n);
result.Should().BeEquivalentTo(
source.Multiply(times: n));
}
public int GetFirstFrequencyReachedTwice(string frequencyChangesAsString)
{
var frequencyChanges = Split(frequencyChangesAsString);
var parsed = frequencyChanges.Select(ParseFrequencyChange);
using (var infiniteLoopingEnumerator = new InfiniteLoopingEnumerator <int>(parsed))
{
var looping = infiniteLoopingEnumerator.AsEnumerable();
var reached = GetReachedFrequencies(looping);
return(GetFirstReachedTwice(reached));
}
}
internal void Enumerates_the_source(
[Frozen] IEnumerable <int> source,
[Frozen] InfiniteLoopingEnumerator <int> enumerator)
{
var result = Enumerable
.Range(0, source.Count())
.Select(_ =>
{
enumerator.MoveNext();
return(enumerator.Current);
});
result.Should().BeEquivalentTo(source);
}
internal void Returns_true_for_some_source(
[Frozen] InfiniteLoopingEnumerator <int> enumerator)
{
enumerator.MoveNext().Should().BeTrue();
}