package mysql

import (
	"encoding/json"
	"testing"
)

func BenchmarkDecodeDecimal(b *testing.B) {
	data := []byte{129, 134, 159, 59, 154, 201, 255, 59, 154, 201, 255, 0, 152, 150, 127, 10, 0}
	precision := 30
	decimals := 25

	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		DecodeDecimal(data, precision, decimals)
	}
}

func TestDecodeDecimalOrig(t *testing.T) {
	testcases := []struct {
		Data        []byte
		Precision   int
		Decimals    int
		Expected    string
		ExpectedPos int
	}{
		{[]byte{117, 200, 127, 255}, 4, 2, "-10.55", 2},
		{[]byte{127, 255, 244, 127, 245}, 5, 0, "-11.0", 3},
		{[]byte{127, 245, 253, 217, 127, 255}, 7, 3, "-10.55", 4},
		{[]byte{127, 255, 255, 245, 200, 127, 255}, 10, 2, "-10.55", 5},
		{[]byte{127, 255, 255, 245, 253, 217, 127, 255}, 10, 3, "-10.55", 6},
		{[]byte{127, 255, 255, 255, 245, 200, 118, 196}, 13, 2, "-10.55", 6},
		{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
		{[]byte{127, 255, 255, 255, 245, 223, 55, 170, 127, 255, 127, 255}, 20, 10, "-10.55", 10},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 245, 255, 41, 39, 127, 255}, 30, 5, "-10.55", 15},
		{[]byte{127, 255, 255, 255, 245, 223, 55, 170, 127, 255, 255, 255, 255, 255, 127, 255}, 30, 20, "-10.55", 14},
		{[]byte{127, 255, 245, 223, 55, 170, 127, 255, 255, 255, 255, 255, 255, 255, 255, 4, 0}, 30, 25, "-10.55", 15},
		{[]byte{128, 1, 128, 0}, 4, 2, "0.01", 2},
		{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
		{[]byte{128, 0, 0, 12, 128, 0}, 7, 3, "0.012", 4},
		{[]byte{128, 0, 0, 0, 1, 128, 0}, 10, 2, "0.01", 5},
		{[]byte{128, 0, 0, 0, 0, 12, 128, 0}, 10, 3, "0.012", 6},
		{[]byte{128, 0, 0, 0, 0, 1, 128, 0}, 13, 2, "0.01", 6},
		{[]byte{128, 0, 188, 97, 78, 1, 96, 11, 128, 0}, 15, 14, "0.01234567890123", 8},
		{[]byte{128, 0, 0, 0, 0, 0, 188, 97, 78, 9, 128, 0}, 20, 10, "0.0123456789", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 211, 128, 0}, 30, 5, "0.01235", 15},
		{[]byte{128, 0, 0, 0, 0, 0, 188, 97, 78, 53, 183, 191, 135, 89, 128, 0}, 30, 20, "0.01234567890123456789", 14},
		{[]byte{128, 0, 0, 0, 188, 97, 78, 53, 183, 191, 135, 0, 135, 253, 217, 30, 0}, 30, 25, "0.0123456789012345678912345", 15},
		{[]byte{227, 99, 128, 48}, 4, 2, "99.99", 2},
		{[]byte{128, 48, 57, 167, 15}, 5, 0, "12345.0", 3},
		{[]byte{167, 15, 3, 231, 128, 0}, 7, 3, "9999.999", 4},
		{[]byte{128, 0, 48, 57, 0, 128, 0}, 10, 2, "12345.0", 5},
		{[]byte{128, 0, 48, 57, 0, 0, 128, 0}, 10, 3, "12345.0", 6},
		{[]byte{128, 0, 0, 48, 57, 0, 137, 59}, 13, 2, "12345.0", 6},
		{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
		{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 128, 0}, 20, 10, "12345.0", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 57, 0, 0, 0, 128, 0}, 30, 5, "12345.0", 15},
		{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 48}, 30, 20, "12345.0", 14},
		{[]byte{128, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0}, 30, 25, "12345.0", 15},
		{[]byte{227, 99, 128, 48}, 4, 2, "99.99", 2},
		{[]byte{128, 48, 57, 167, 15}, 5, 0, "12345.0", 3},
		{[]byte{167, 15, 3, 231, 128, 0}, 7, 3, "9999.999", 4},
		{[]byte{128, 0, 48, 57, 0, 128, 0}, 10, 2, "12345.0", 5},
		{[]byte{128, 0, 48, 57, 0, 0, 128, 0}, 10, 3, "12345.0", 6},
		{[]byte{128, 0, 0, 48, 57, 0, 137, 59}, 13, 2, "12345.0", 6},
		{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
		{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 128, 0}, 20, 10, "12345.0", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 57, 0, 0, 0, 128, 0}, 30, 5, "12345.0", 15},
		{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 48}, 30, 20, "12345.0", 14},
		{[]byte{128, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0}, 30, 25, "12345.0", 15},
		{[]byte{227, 99, 128, 0}, 4, 2, "99.99", 2},
		{[]byte{128, 0, 123, 128, 123}, 5, 0, "123.0", 3},
		{[]byte{128, 123, 1, 194, 128, 0}, 7, 3, "123.45", 4},
		{[]byte{128, 0, 0, 123, 45, 128, 0}, 10, 2, "123.45", 5},
		{[]byte{128, 0, 0, 123, 1, 194, 128, 0}, 10, 3, "123.45", 6},
		{[]byte{128, 0, 0, 0, 123, 45, 137, 59}, 13, 2, "123.45", 6},
		{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
		{[]byte{128, 0, 0, 0, 123, 26, 210, 116, 128, 0, 128, 0}, 20, 10, "123.45", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 123, 0, 175, 200, 128, 0}, 30, 5, "123.45", 15},
		{[]byte{128, 0, 0, 0, 123, 26, 210, 116, 128, 0, 0, 0, 0, 0, 128, 0}, 30, 20, "123.45", 14},
		{[]byte{128, 0, 123, 26, 210, 116, 128, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0}, 30, 25, "123.45", 15},
		{[]byte{28, 156, 127, 255}, 4, 2, "-99.99", 2},
		{[]byte{127, 255, 132, 127, 132}, 5, 0, "-123.0", 3},
		{[]byte{127, 132, 254, 61, 127, 255}, 7, 3, "-123.45", 4},
		{[]byte{127, 255, 255, 132, 210, 127, 255}, 10, 2, "-123.45", 5},
		{[]byte{127, 255, 255, 132, 254, 61, 127, 255}, 10, 3, "-123.45", 6},
		{[]byte{127, 255, 255, 255, 132, 210, 118, 196}, 13, 2, "-123.45", 6},
		{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
		{[]byte{127, 255, 255, 255, 132, 229, 45, 139, 127, 255, 127, 255}, 20, 10, "-123.45", 10},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 132, 255, 80, 55, 127, 255}, 30, 5, "-123.45", 15},
		{[]byte{127, 255, 255, 255, 132, 229, 45, 139, 127, 255, 255, 255, 255, 255, 127, 255}, 30, 20, "-123.45", 14},
		{[]byte{127, 255, 132, 229, 45, 139, 127, 255, 255, 255, 255, 255, 255, 255, 255, 20, 0}, 30, 25, "-123.45", 15},
		{[]byte{128, 0, 128, 0}, 4, 2, "0.0", 2},
		{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
		{[]byte{128, 0, 0, 0, 128, 0}, 7, 3, "0.0", 4},
		{[]byte{128, 0, 0, 0, 0, 128, 0}, 10, 2, "0.0", 5},
		{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 10, 3, "0.0", 6},
		{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 13, 2, "0.0", 6},
		{[]byte{128, 0, 1, 226, 58, 0, 0, 99, 128, 0}, 15, 14, "0.00012345000099", 8},
		{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 128, 0}, 20, 10, "0.00012345", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 128, 0}, 30, 5, "0.00012", 15},
		{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 128, 0}, 30, 20, "0.00012345000098765", 14},
		{[]byte{128, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 0, 0, 0, 15, 0}, 30, 25, "0.00012345000098765", 15},
		{[]byte{128, 0, 128, 0}, 4, 2, "0.0", 2},
		{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
		{[]byte{128, 0, 0, 0, 128, 0}, 7, 3, "0.0", 4},
		{[]byte{128, 0, 0, 0, 0, 128, 0}, 10, 2, "0.0", 5},
		{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 10, 3, "0.0", 6},
		{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 13, 2, "0.0", 6},
		{[]byte{128, 0, 1, 226, 58, 0, 0, 99, 128, 0}, 15, 14, "0.00012345000099", 8},
		{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 128, 0}, 20, 10, "0.00012345", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 128, 0}, 30, 5, "0.00012", 15},
		{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 128, 0}, 30, 20, "0.00012345000098765", 14},
		{[]byte{128, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 0, 0, 0, 22, 0}, 30, 25, "0.00012345000098765", 15},
		{[]byte{128, 12, 128, 0}, 4, 2, "0.12", 2},
		{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
		{[]byte{128, 0, 0, 123, 128, 0}, 7, 3, "0.123", 4},
		{[]byte{128, 0, 0, 0, 12, 128, 0}, 10, 2, "0.12", 5},
		{[]byte{128, 0, 0, 0, 0, 123, 128, 0}, 10, 3, "0.123", 6},
		{[]byte{128, 0, 0, 0, 0, 12, 128, 7}, 13, 2, "0.12", 6},
		{[]byte{128, 7, 91, 178, 144, 1, 129, 205, 128, 0}, 15, 14, "0.12345000098765", 8},
		{[]byte{128, 0, 0, 0, 0, 7, 91, 178, 145, 0, 128, 0}, 20, 10, "0.123450001", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 57, 128, 0}, 30, 5, "0.12345", 15},
		{[]byte{128, 0, 0, 0, 0, 7, 91, 178, 144, 58, 222, 87, 208, 0, 128, 0}, 30, 20, "0.12345000098765", 14},
		{[]byte{128, 0, 0, 7, 91, 178, 144, 58, 222, 87, 208, 0, 0, 0, 0, 30, 0}, 30, 25, "0.12345000098765", 15},
		{[]byte{128, 0, 128, 0}, 4, 2, "0.0", 2},
		{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
		{[]byte{128, 0, 0, 0, 128, 0}, 7, 3, "0.0", 4},
		{[]byte{128, 0, 0, 0, 0, 128, 0}, 10, 2, "0.0", 5},
		{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 10, 3, "0.0", 6},
		{[]byte{128, 0, 0, 0, 0, 0, 127, 255}, 13, 2, "0.0", 6},
		{[]byte{127, 255, 255, 255, 243, 255, 121, 59, 127, 255}, 15, 14, "-0.000000012345", 8},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 243, 252, 128, 0}, 20, 10, "-0.0000000123", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 127, 255}, 30, 5, "0.0", 15},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 243, 235, 111, 183, 93, 178, 127, 255}, 30, 20, "-0.00000001234500009877", 14},
		{[]byte{127, 255, 255, 255, 255, 255, 243, 235, 111, 183, 93, 255, 139, 69, 47, 30, 0}, 30, 25, "-0.000000012345000098765", 15},
		{[]byte{227, 99, 129, 134}, 4, 2, "99.99", 2},
		{[]byte{129, 134, 159, 167, 15}, 5, 0, "99999.0", 3},
		{[]byte{167, 15, 3, 231, 133, 245}, 7, 3, "9999.999", 4},
		{[]byte{133, 245, 224, 255, 99, 128, 152}, 10, 2, "99999999.99", 5},
		{[]byte{128, 152, 150, 127, 3, 231, 227, 59}, 10, 3, "9999999.999", 6},
		{[]byte{227, 59, 154, 201, 255, 99, 137, 59}, 13, 2, "99999999999.99", 6},
		{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 137, 59}, 15, 14, "9.99999999999999", 8},
		{[]byte{137, 59, 154, 201, 255, 59, 154, 201, 255, 9, 128, 0}, 20, 10, "9999999999.9999999999", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 4, 210, 29, 205, 139, 148, 0, 195, 80, 137, 59}, 30, 5, "1234500009876.5", 15},
		{[]byte{137, 59, 154, 201, 255, 59, 154, 201, 255, 59, 154, 201, 255, 99, 129, 134}, 30, 20, "9999999999.99999999999999999999", 14},
		{[]byte{129, 134, 159, 59, 154, 201, 255, 59, 154, 201, 255, 0, 152, 150, 127, 30, 0}, 30, 25, "99999.9999999999999999999999999", 15},
		{[]byte{227, 99, 129, 134}, 4, 2, "99.99", 2},
		{[]byte{129, 134, 159, 167, 15}, 5, 0, "99999.0", 3},
		{[]byte{167, 15, 3, 231, 133, 245}, 7, 3, "9999.999", 4},
		{[]byte{133, 245, 224, 255, 99, 128, 152}, 10, 2, "99999999.99", 5},
		{[]byte{128, 152, 150, 127, 3, 231, 128, 6}, 10, 3, "9999999.999", 6},
		{[]byte{128, 6, 159, 107, 199, 11, 137, 59}, 13, 2, "111111111.11", 6},
		{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 6}, 15, 14, "9.99999999999999", 8},
		{[]byte{128, 6, 159, 107, 199, 6, 142, 119, 128, 0, 128, 0}, 20, 10, "111111111.11", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 6, 159, 107, 199, 0, 42, 248, 128, 6}, 30, 5, "111111111.11", 15},
		{[]byte{128, 6, 159, 107, 199, 6, 142, 119, 128, 0, 0, 0, 0, 0, 129, 134}, 30, 20, "111111111.11", 14},
		{[]byte{129, 134, 159, 59, 154, 201, 255, 59, 154, 201, 255, 0, 152, 150, 127, 10, 0}, 30, 25, "99999.9999999999999999999999999", 15},
		{[]byte{128, 1, 128, 0}, 4, 2, "0.01", 2},
		{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
		{[]byte{128, 0, 0, 10, 128, 0}, 7, 3, "0.01", 4},
		{[]byte{128, 0, 0, 0, 1, 128, 0}, 10, 2, "0.01", 5},
		{[]byte{128, 0, 0, 0, 0, 10, 128, 0}, 10, 3, "0.01", 6},
		{[]byte{128, 0, 0, 0, 0, 1, 128, 0}, 13, 2, "0.01", 6},
		{[]byte{128, 0, 152, 150, 128, 0, 0, 0, 128, 0}, 15, 14, "0.01", 8},
		{[]byte{128, 0, 0, 0, 0, 0, 152, 150, 128, 0, 128, 0}, 20, 10, "0.01", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 232, 128, 0}, 30, 5, "0.01", 15},
		{[]byte{128, 0, 0, 0, 0, 0, 152, 150, 128, 0, 0, 0, 0, 0, 128, 0}, 30, 20, "0.01", 14},
		{[]byte{128, 0, 0, 0, 152, 150, 128, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0}, 30, 25, "0.01", 15},
		{[]byte{227, 99, 128, 0}, 4, 2, "99.99", 2},
		{[]byte{128, 0, 123, 128, 123}, 5, 0, "123.0", 3},
		{[]byte{128, 123, 1, 144, 128, 0}, 7, 3, "123.4", 4},
		{[]byte{128, 0, 0, 123, 40, 128, 0}, 10, 2, "123.4", 5},
		{[]byte{128, 0, 0, 123, 1, 144, 128, 0}, 10, 3, "123.4", 6},
		{[]byte{128, 0, 0, 0, 123, 40, 137, 59}, 13, 2, "123.4", 6},
		{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
		{[]byte{128, 0, 0, 0, 123, 23, 215, 132, 0, 0, 128, 0}, 20, 10, "123.4", 10},
		{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 123, 0, 156, 64, 128, 0}, 30, 5, "123.4", 15},
		{[]byte{128, 0, 0, 0, 123, 23, 215, 132, 0, 0, 0, 0, 0, 0, 128, 0}, 30, 20, "123.4", 14},
		{[]byte{128, 0, 123, 23, 215, 132, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0}, 30, 25, "123.4", 15},
		{[]byte{28, 156, 127, 253}, 4, 2, "-99.99", 2},
		{[]byte{127, 253, 204, 125, 205}, 5, 0, "-563.0", 3},
		{[]byte{125, 205, 253, 187, 127, 255}, 7, 3, "-562.58", 4},
		{[]byte{127, 255, 253, 205, 197, 127, 255}, 10, 2, "-562.58", 5},
		{[]byte{127, 255, 253, 205, 253, 187, 127, 255}, 10, 3, "-562.58", 6},
		{[]byte{127, 255, 255, 253, 205, 197, 118, 196}, 13, 2, "-562.58", 6},
		{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
		{[]byte{127, 255, 255, 253, 205, 221, 109, 230, 255, 255, 127, 255}, 20, 10, "-562.58", 10},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 253, 205, 255, 29, 111, 127, 255}, 30, 5, "-562.58", 15},
		{[]byte{127, 255, 255, 253, 205, 221, 109, 230, 255, 255, 255, 255, 255, 255, 127, 253}, 30, 20, "-562.58", 14},
		{[]byte{127, 253, 205, 221, 109, 230, 255, 255, 255, 255, 255, 255, 255, 255, 255, 13, 0}, 30, 25, "-562.58", 15},
		{[]byte{28, 156, 127, 241}, 4, 2, "-99.99", 2},
		{[]byte{127, 241, 140, 113, 140}, 5, 0, "-3699.0", 3},
		{[]byte{113, 140, 255, 245, 127, 255}, 7, 3, "-3699.01", 4},
		{[]byte{127, 255, 241, 140, 254, 127, 255}, 10, 2, "-3699.01", 5},
		{[]byte{127, 255, 241, 140, 255, 245, 127, 255}, 10, 3, "-3699.01", 6},
		{[]byte{127, 255, 255, 241, 140, 254, 118, 196}, 13, 2, "-3699.01", 6},
		{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
		{[]byte{127, 255, 255, 241, 140, 255, 103, 105, 127, 255, 127, 255}, 20, 10, "-3699.01", 10},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 241, 140, 255, 252, 23, 127, 255}, 30, 5, "-3699.01", 15},
		{[]byte{127, 255, 255, 241, 140, 255, 103, 105, 127, 255, 255, 255, 255, 255, 127, 241}, 30, 20, "-3699.01", 14},
		{[]byte{127, 241, 140, 255, 103, 105, 127, 255, 255, 255, 255, 255, 255, 255, 255, 13, 0}, 30, 25, "-3699.01", 15},
		{[]byte{28, 156, 127, 248}, 4, 2, "-99.99", 2},
		{[]byte{127, 248, 99, 120, 99}, 5, 0, "-1948.0", 3},
		{[]byte{120, 99, 255, 115, 127, 255}, 7, 3, "-1948.14", 4},
		{[]byte{127, 255, 248, 99, 241, 127, 255}, 10, 2, "-1948.14", 5},
		{[]byte{127, 255, 248, 99, 255, 115, 127, 255}, 10, 3, "-1948.14", 6},
		{[]byte{127, 255, 255, 248, 99, 241, 118, 196}, 13, 2, "-1948.14", 6},
		{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
		{[]byte{127, 255, 255, 248, 99, 247, 167, 196, 255, 255, 127, 255}, 20, 10, "-1948.14", 10},
		{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 248, 99, 255, 201, 79, 127, 255}, 30, 5, "-1948.14", 15},
		{[]byte{127, 255, 255, 248, 99, 247, 167, 196, 255, 255, 255, 255, 255, 255, 127, 248}, 30, 20, "-1948.14", 14},
		{[]byte{127, 248, 99, 247, 167, 196, 255, 255, 255, 255, 255, 255, 255, 255, 255, 13, 0}, 30, 25, "-1948.14", 15},
	}

	for _, tc := range testcases {
		d, size := DecodeDecimal(tc.Data, tc.Precision, tc.Decimals)
		b, err := json.Marshal(d)
		if err != nil {
			t.Fatalf("Unexpected error (exp: %q): %v", tc.Expected, err)
		}
		out := string(b)
		if tc.Expected != out {
			t.Errorf("Expected %s, got %s", tc.Expected, out)
		}

		if tc.ExpectedPos != size {
			t.Errorf("Expected %d bytes, got %d", tc.ExpectedPos, size)
		}
	}
}