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package common
import (
"fmt"
"math/big"
"testing"
"github.com/stretchr/testify/assert"
)
func TestFeePercentage(t *testing.T) {
assert.InEpsilon(t, 2.68e-18, FeeSelector(1).Percentage(), 0.002)
assert.InEpsilon(t, 6.76e-14, FeeSelector(10).Percentage(), 0.002)
assert.InEpsilon(t, 3.91e-03, FeeSelector(32).Percentage(), 0.002)
assert.InEpsilon(t, 7.29e-03, FeeSelector(50).Percentage(), 0.002)
assert.InEpsilon(t, 4.12e-02, FeeSelector(100).Percentage(), 0.002)
assert.InEpsilon(t, 2.33e-01, FeeSelector(150).Percentage(), 0.002)
assert.InEpsilon(t, 1.00e+00, FeeSelector(192).Percentage(), 0.002)
assert.InEpsilon(t, 2.56e+02, FeeSelector(200).Percentage(), 0.002)
assert.InEpsilon(t, 2.88e+17, FeeSelector(250).Percentage(), 0.002)
}
func TestCalcFeeAmount(t *testing.T) {
v := big.NewInt(1000)
feeAmount, err := CalcFeeAmount(v, FeeSelector(195)) // 800%
assert.Nil(t, err)
assert.Equal(t, "8000", feeAmount.String())
feeAmount, err = CalcFeeAmount(v, FeeSelector(192)) // 100%
assert.Nil(t, err)
assert.Equal(t, "1000", feeAmount.String())
feeAmount, err = CalcFeeAmount(v, FeeSelector(172)) // 50%
assert.Nil(t, err)
assert.Equal(t, "500", feeAmount.String())
feeAmount, err = CalcFeeAmount(v, FeeSelector(126)) // 10.2%
assert.Nil(t, err)
assert.Equal(t, "101", feeAmount.String())
feeAmount, err = CalcFeeAmount(v, FeeSelector(60)) // 1.03%
assert.Nil(t, err)
assert.Equal(t, "10", feeAmount.String())
feeAmount, err = CalcFeeAmount(v, FeeSelector(31)) // 0.127%
assert.Nil(t, err)
assert.Equal(t, "1", feeAmount.String())
}
func TestFeePrintSQLSwitch(t *testing.T) {
for i := 0; i < 256; i++ {
f := FeeSelector(i).Percentage()
fmt.Printf(" WHEN $1 = %03d THEN %.6e\n", i, f)
}
}