public void GenerateNoResultsWithNoErrorsForEmptyInput()
{
var items = new string[0];
var permutations = PermutationService.GenerateFor(items).ToArray();
permutations.Length.ShouldBe(0);
}
public void GeneratesPermutationsForGivenNames()
{
var items = new[] { "a", "b", "c" };
var permutations = PermutationService.GenerateFor(items).ToArray();
permutations.Length.ShouldBe(6);
permutations.ShouldContain(p => p.SequenceEqual(new[] { "a", "b", "c" }));
permutations.ShouldContain(p => p.SequenceEqual(new[] { "b", "a", "c" }));
permutations.ShouldContain(p => p.SequenceEqual(new[] { "c", "a", "b" }));
permutations.ShouldContain(p => p.SequenceEqual(new[] { "a", "c", "b" }));
permutations.ShouldContain(p => p.SequenceEqual(new[] { "b", "c", "a" }));
permutations.ShouldContain(p => p.SequenceEqual(new[] { "c", "b", "a" }));
}