package generics

import (
	"testing"

	"github.com/stretchr/testify/require"
)

func TestPairsKeys(t *testing.T) {
	tests := map[string]struct {
		src Pairs[string, int]
		dst []string
	}{
		"nil pairs": {
			src: nil,
			dst: []string{},
		},
		"empty pairs": {
			src: Pairs[string, int]{},
			dst: []string{},
		},
		"filled pairs": {
			src: Pairs[string, int]{
				{
					Key:   "foo",
					Value: 1,
				},
				{
					Key:   "bar",
					Value: 2,
				},
				{
					Key:   "baz",
					Value: 3,
				},
			},
			dst: []string{
				"foo",
				"bar",
				"baz",
			},
		},
	}

	for name, tc := range tests {
		name, tc := name, tc
		t.Run(name, func(t *testing.T) {
			dst := tc.src.Keys()
			require.ElementsMatch(t, tc.dst, dst)
		})
	}
}

func TestPairsValues(t *testing.T) {
	tests := map[string]struct {
		src Pairs[string, int]
		dst []int
	}{
		"nil pairs": {
			src: nil,
			dst: []int{},
		},
		"empty pairs": {
			src: Pairs[string, int]{},
			dst: []int{},
		},
		"filled pairs": {
			src: Pairs[string, int]{
				{
					Key:   "foo",
					Value: 1,
				},
				{
					Key:   "bar",
					Value: 2,
				},
				{
					Key:   "baz",
					Value: 3,
				},
			},
			dst: []int{1, 2, 3},
		},
	}

	for name, tc := range tests {
		name, tc := name, tc
		t.Run(name, func(t *testing.T) {
			dst := tc.src.Values()
			require.ElementsMatch(t, tc.dst, dst)
		})
	}
}