public async Task ProcessModifiedFiles_OnEmptyModifiedFiles_ReturnEmptyEnumerable()
{
var logger = Substitute.For <ILogger>();
var emptyList = new List <CodeFragment>();
var(
addedFragments,
modifiedFragments,
deletedFragments
) = await _fileProcessor.ProcessModifiedFiles(new Collection <string>(), logger);
CollectionAssert.AreEquivalent(emptyList, addedFragments);
CollectionAssert.AreEquivalent(emptyList, modifiedFragments);
CollectionAssert.AreEquivalent(emptyList, deletedFragments);
}