package permutation

import (
	"testing"
)

func TestPermutations(t *testing.T) {
	testCases := []struct {
		name          string
		seed          []int
		permsExpected int
	}{
		{
			"basic",
			[]int{1, 2, 3},
			6,
		},
	}

	for _, testCase := range testCases {
		t.Run(testCase.name, func(t *testing.T) {
			perms := Permutations(testCase.seed)
			if len(perms) != testCase.permsExpected {
				t.Errorf("len(perms) == %d, expected %d", len(perms), testCase.permsExpected)
			}
		})
	}
}

func TestPermutationsAllSizes(t *testing.T) {
	testCases := []struct {
		name          string
		seed          []int
		permsExpected int
	}{
		{
			"3 ints",
			[]int{1, 2, 3},
			15,
		},
	}

	for _, testCase := range testCases {
		t.Run(testCase.name, func(t *testing.T) {
			perms := PermutationsAllSizes(testCase.seed)
			if len(perms) != testCase.permsExpected {
				t.Errorf("len(perms) == %d, expected %d", len(perms), testCase.permsExpected)
			}
		})
	}
}