package precision_test import ( "math/big" "testing" "github.com/TrueCloudLab/frostfs-node/pkg/util/precision" "github.com/stretchr/testify/require" ) func TestFixed8Converter_ToBalancePrecision(t *testing.T) { var n int64 = 100*100_000_000 + 12_345_678 t.Run("same precision", func(t *testing.T) { cnv := precision.NewConverter(8) res := cnv.ToBalancePrecision(n) require.Equal(t, n, res) }) t.Run("bigger target", func(t *testing.T) { cnv := precision.NewConverter(10) exp := n * 100 res := cnv.ToBalancePrecision(n) require.Equal(t, exp, res) }) t.Run("less target", func(t *testing.T) { cnv := precision.NewConverter(6) exp := n / 100 res := cnv.ToBalancePrecision(n) require.Equal(t, exp, res) cnv = precision.NewConverter(0) exp = n / 100_000_000 res = cnv.ToBalancePrecision(n) require.Equal(t, exp, res) }) } func TestFixed8Converter_ToFixed8(t *testing.T) { var n int64 = 100*10_000_000 + 12_345_678 t.Run("same precision", func(t *testing.T) { cnv := precision.NewConverter(8) res := cnv.ToFixed8(n) require.Equal(t, n, res) }) t.Run("bigger target", func(t *testing.T) { cnv := precision.NewConverter(10) exp := n / 100 res := cnv.ToFixed8(n) require.Equal(t, exp, res) }) t.Run("less target", func(t *testing.T) { cnv := precision.NewConverter(6) exp := n * 100 res := cnv.ToFixed8(n) require.Equal(t, exp, res) n = 1 cnv = precision.NewConverter(0) exp = n * 100_000_000 res = cnv.ToFixed8(n) require.Equal(t, exp, res) }) } func TestConvert(t *testing.T) { n := big.NewInt(100*10_000_000 + 12_345_678) t.Run("same precision", func(t *testing.T) { require.Equal(t, n, precision.Convert(8, 8, n)) require.Equal(t, n, precision.Convert(0, 0, n)) }) t.Run("bigger target", func(t *testing.T) { exp := new(big.Int).Mul(n, big.NewInt(100)) require.Equal(t, exp, precision.Convert(8, 10, n)) require.Equal(t, exp, precision.Convert(0, 2, n)) }) t.Run("less target", func(t *testing.T) { exp := new(big.Int).Div(n, big.NewInt(100)) require.Equal(t, exp, precision.Convert(10, 8, n)) require.Equal(t, exp, precision.Convert(2, 0, n)) }) }