package writecachebitcask

import (
	"math"
	"testing"

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

func TestDispatchRecoveredIndices(t *testing.T) {
	max := uint32(math.MaxUint32)
	tests := []struct {
		indices   []uint32
		wantOrder []uint32
		wantIndex uint32
	}{
		{[]uint32{0}, []uint32{0}, 1},
		{[]uint32{42}, []uint32{42}, 43},
		{[]uint32{5, 6, 7, 8}, []uint32{5, 6, 7, 8}, 9},
		{[]uint32{max - 2, max - 1, max}, []uint32{max - 2, max - 1, max}, 0},
		{[]uint32{0, 1, 2, max - 2, max - 1, max}, []uint32{max - 2, max - 1, max, 0, 1, 2}, 3},
		{[]uint32{0, max}, []uint32{max, 0}, 1},
	}

	for _, tc := range tests {
		var gotOrder []uint32
		gotIndex := dispatchRecoveredLogIndices(tc.indices, func(i uint32) {
			gotOrder = append(gotOrder, i)
		})
		require.Equal(t, tc.wantOrder, gotOrder)
		require.Equal(t, tc.wantIndex, gotIndex)
	}
}