Encode decimals as floats without precision loss
This commit is contained in:
parent
68567fad6e
commit
c0a153a532
2
Makefile
2
Makefile
@ -2,4 +2,4 @@ install:
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dep ensure
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test:
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go test -v ./tests
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go test -v ./{mysql,tests}
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@ -2,13 +2,23 @@ package mysql
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import (
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"bytes"
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"database/sql/driver"
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"encoding/binary"
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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)
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// Decimal represents a decimal type that retains precision until converted to
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// a float. It is designed to be marshaled into JSON without losing precision.
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type Decimal struct {
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str string
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}
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// DecodeDecimal decodes a decimal value.
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// Implementation borrowed from https://github.com/siddontang/go-mysql/
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func DecodeDecimal(data []byte, precision int, decimals int) (string, int) {
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func DecodeDecimal(data []byte, precision int, decimals int) (Decimal, int) {
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const digitsPerInteger int = 9
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var compressedBytes = [...]int{0, 1, 1, 2, 2, 3, 3, 4, 4, 4}
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@ -21,6 +31,7 @@ func DecodeDecimal(data []byte, precision int, decimals int) (string, int) {
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value = uint32(DecodeVarLen64BigEndian(databuff))
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return
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}
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// See python mysql replication and https://github.com/jeremycole/mysql_binlog
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integral := (precision - decimals)
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uncompIntegral := int(integral / digitsPerInteger)
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@ -73,5 +84,49 @@ func DecodeDecimal(data []byte, precision int, decimals int) (string, int) {
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pos += size
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}
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return res.String(), pos
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return NewDecimal(res.String()), pos
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}
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// NewDecimal creates a new decimal with given value.
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func NewDecimal(str string) Decimal {
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var sign string
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if str[0] == '-' {
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str = str[1:]
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sign = "-"
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}
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str = strings.Trim(str, "0")
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if str[0] == '.' {
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str = "0" + str
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}
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if str[len(str)-1] == '.' {
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str += "0"
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}
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return Decimal{sign + str}
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}
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// Float64 returns a float representation of the decimal. Precision could be
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// lost.
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func (d Decimal) Float64() float64 {
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f, _ := strconv.ParseFloat(d.str, 64)
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return f
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}
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var _ json.Marshaler = Decimal{}
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// MarshalJSON returns the JSON encoding of the decimal.
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func (d Decimal) MarshalJSON() ([]byte, error) {
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return []byte(d.str), nil
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}
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var _ fmt.Stringer = Decimal{}
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func (d Decimal) String() string {
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return d.str
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}
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var _ driver.Valuer = Decimal{}
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// Value returns a driver Value.
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func (d Decimal) Value() (driver.Value, error) {
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return d.str, nil
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}
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231
mysql/decimal_test.go
Normal file
231
mysql/decimal_test.go
Normal file
@ -0,0 +1,231 @@
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package mysql
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import (
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"encoding/json"
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"testing"
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)
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func BenchmarkDecodeDecimal(b *testing.B) {
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data := []byte{129, 134, 159, 59, 154, 201, 255, 59, 154, 201, 255, 0, 152, 150, 127, 10, 0}
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precision := 30
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decimals := 25
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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DecodeDecimal(data, precision, decimals)
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}
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}
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func TestDecodeDecimalOrig(t *testing.T) {
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testcases := []struct {
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Data []byte
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Precision int
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Decimals int
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Expected string
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ExpectedPos int
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}{
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{[]byte{117, 200, 127, 255}, 4, 2, "-10.55", 2},
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{[]byte{127, 255, 244, 127, 245}, 5, 0, "-11.0", 3},
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{[]byte{127, 245, 253, 217, 127, 255}, 7, 3, "-10.55", 4},
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{[]byte{127, 255, 255, 245, 200, 127, 255}, 10, 2, "-10.55", 5},
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{[]byte{127, 255, 255, 245, 253, 217, 127, 255}, 10, 3, "-10.55", 6},
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{[]byte{127, 255, 255, 255, 245, 200, 118, 196}, 13, 2, "-10.55", 6},
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{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
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{[]byte{127, 255, 255, 255, 245, 223, 55, 170, 127, 255, 127, 255}, 20, 10, "-10.55", 10},
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{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 245, 255, 41, 39, 127, 255}, 30, 5, "-10.55", 15},
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{[]byte{127, 255, 255, 255, 245, 223, 55, 170, 127, 255, 255, 255, 255, 255, 127, 255}, 30, 20, "-10.55", 14},
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{[]byte{127, 255, 245, 223, 55, 170, 127, 255, 255, 255, 255, 255, 255, 255, 255, 4, 0}, 30, 25, "-10.55", 15},
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{[]byte{128, 1, 128, 0}, 4, 2, "0.01", 2},
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{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
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{[]byte{128, 0, 0, 12, 128, 0}, 7, 3, "0.012", 4},
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{[]byte{128, 0, 0, 0, 1, 128, 0}, 10, 2, "0.01", 5},
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{[]byte{128, 0, 0, 0, 0, 12, 128, 0}, 10, 3, "0.012", 6},
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{[]byte{128, 0, 0, 0, 0, 1, 128, 0}, 13, 2, "0.01", 6},
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{[]byte{128, 0, 188, 97, 78, 1, 96, 11, 128, 0}, 15, 14, "0.01234567890123", 8},
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{[]byte{128, 0, 0, 0, 0, 0, 188, 97, 78, 9, 128, 0}, 20, 10, "0.0123456789", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 211, 128, 0}, 30, 5, "0.01235", 15},
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{[]byte{128, 0, 0, 0, 0, 0, 188, 97, 78, 53, 183, 191, 135, 89, 128, 0}, 30, 20, "0.01234567890123456789", 14},
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{[]byte{128, 0, 0, 0, 188, 97, 78, 53, 183, 191, 135, 0, 135, 253, 217, 30, 0}, 30, 25, "0.0123456789012345678912345", 15},
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{[]byte{227, 99, 128, 48}, 4, 2, "99.99", 2},
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{[]byte{128, 48, 57, 167, 15}, 5, 0, "12345.0", 3},
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{[]byte{167, 15, 3, 231, 128, 0}, 7, 3, "9999.999", 4},
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{[]byte{128, 0, 48, 57, 0, 128, 0}, 10, 2, "12345.0", 5},
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{[]byte{128, 0, 48, 57, 0, 0, 128, 0}, 10, 3, "12345.0", 6},
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{[]byte{128, 0, 0, 48, 57, 0, 137, 59}, 13, 2, "12345.0", 6},
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{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
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{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 128, 0}, 20, 10, "12345.0", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 57, 0, 0, 0, 128, 0}, 30, 5, "12345.0", 15},
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{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 48}, 30, 20, "12345.0", 14},
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{[]byte{128, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0}, 30, 25, "12345.0", 15},
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{[]byte{227, 99, 128, 48}, 4, 2, "99.99", 2},
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{[]byte{128, 48, 57, 167, 15}, 5, 0, "12345.0", 3},
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{[]byte{167, 15, 3, 231, 128, 0}, 7, 3, "9999.999", 4},
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{[]byte{128, 0, 48, 57, 0, 128, 0}, 10, 2, "12345.0", 5},
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{[]byte{128, 0, 48, 57, 0, 0, 128, 0}, 10, 3, "12345.0", 6},
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{[]byte{128, 0, 0, 48, 57, 0, 137, 59}, 13, 2, "12345.0", 6},
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{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
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{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 128, 0}, 20, 10, "12345.0", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 57, 0, 0, 0, 128, 0}, 30, 5, "12345.0", 15},
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{[]byte{128, 0, 0, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 48}, 30, 20, "12345.0", 14},
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{[]byte{128, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0}, 30, 25, "12345.0", 15},
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{[]byte{227, 99, 128, 0}, 4, 2, "99.99", 2},
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{[]byte{128, 0, 123, 128, 123}, 5, 0, "123.0", 3},
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{[]byte{128, 123, 1, 194, 128, 0}, 7, 3, "123.45", 4},
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{[]byte{128, 0, 0, 123, 45, 128, 0}, 10, 2, "123.45", 5},
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{[]byte{128, 0, 0, 123, 1, 194, 128, 0}, 10, 3, "123.45", 6},
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{[]byte{128, 0, 0, 0, 123, 45, 137, 59}, 13, 2, "123.45", 6},
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{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 0}, 15, 14, "9.99999999999999", 8},
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{[]byte{128, 0, 0, 0, 123, 26, 210, 116, 128, 0, 128, 0}, 20, 10, "123.45", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 123, 0, 175, 200, 128, 0}, 30, 5, "123.45", 15},
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{[]byte{128, 0, 0, 0, 123, 26, 210, 116, 128, 0, 0, 0, 0, 0, 128, 0}, 30, 20, "123.45", 14},
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{[]byte{128, 0, 123, 26, 210, 116, 128, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0}, 30, 25, "123.45", 15},
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{[]byte{28, 156, 127, 255}, 4, 2, "-99.99", 2},
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{[]byte{127, 255, 132, 127, 132}, 5, 0, "-123.0", 3},
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{[]byte{127, 132, 254, 61, 127, 255}, 7, 3, "-123.45", 4},
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{[]byte{127, 255, 255, 132, 210, 127, 255}, 10, 2, "-123.45", 5},
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{[]byte{127, 255, 255, 132, 254, 61, 127, 255}, 10, 3, "-123.45", 6},
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{[]byte{127, 255, 255, 255, 132, 210, 118, 196}, 13, 2, "-123.45", 6},
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{[]byte{118, 196, 101, 54, 0, 254, 121, 96, 127, 255}, 15, 14, "-9.99999999999999", 8},
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{[]byte{127, 255, 255, 255, 132, 229, 45, 139, 127, 255, 127, 255}, 20, 10, "-123.45", 10},
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{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 132, 255, 80, 55, 127, 255}, 30, 5, "-123.45", 15},
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{[]byte{127, 255, 255, 255, 132, 229, 45, 139, 127, 255, 255, 255, 255, 255, 127, 255}, 30, 20, "-123.45", 14},
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{[]byte{127, 255, 132, 229, 45, 139, 127, 255, 255, 255, 255, 255, 255, 255, 255, 20, 0}, 30, 25, "-123.45", 15},
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{[]byte{128, 0, 128, 0}, 4, 2, "0.0", 2},
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{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
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{[]byte{128, 0, 0, 0, 128, 0}, 7, 3, "0.0", 4},
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{[]byte{128, 0, 0, 0, 0, 128, 0}, 10, 2, "0.0", 5},
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{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 10, 3, "0.0", 6},
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{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 13, 2, "0.0", 6},
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{[]byte{128, 0, 1, 226, 58, 0, 0, 99, 128, 0}, 15, 14, "0.00012345000099", 8},
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{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 128, 0}, 20, 10, "0.00012345", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 128, 0}, 30, 5, "0.00012", 15},
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{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 128, 0}, 30, 20, "0.00012345000098765", 14},
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{[]byte{128, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 0, 0, 0, 15, 0}, 30, 25, "0.00012345000098765", 15},
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{[]byte{128, 0, 128, 0}, 4, 2, "0.0", 2},
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{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
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{[]byte{128, 0, 0, 0, 128, 0}, 7, 3, "0.0", 4},
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{[]byte{128, 0, 0, 0, 0, 128, 0}, 10, 2, "0.0", 5},
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{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 10, 3, "0.0", 6},
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{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 13, 2, "0.0", 6},
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{[]byte{128, 0, 1, 226, 58, 0, 0, 99, 128, 0}, 15, 14, "0.00012345000099", 8},
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{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 128, 0}, 20, 10, "0.00012345", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 128, 0}, 30, 5, "0.00012", 15},
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{[]byte{128, 0, 0, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 128, 0}, 30, 20, "0.00012345000098765", 14},
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{[]byte{128, 0, 0, 0, 1, 226, 58, 0, 15, 18, 2, 0, 0, 0, 0, 22, 0}, 30, 25, "0.00012345000098765", 15},
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{[]byte{128, 12, 128, 0}, 4, 2, "0.12", 2},
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{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
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{[]byte{128, 0, 0, 123, 128, 0}, 7, 3, "0.123", 4},
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{[]byte{128, 0, 0, 0, 12, 128, 0}, 10, 2, "0.12", 5},
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{[]byte{128, 0, 0, 0, 0, 123, 128, 0}, 10, 3, "0.123", 6},
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{[]byte{128, 0, 0, 0, 0, 12, 128, 7}, 13, 2, "0.12", 6},
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{[]byte{128, 7, 91, 178, 144, 1, 129, 205, 128, 0}, 15, 14, "0.12345000098765", 8},
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{[]byte{128, 0, 0, 0, 0, 7, 91, 178, 145, 0, 128, 0}, 20, 10, "0.123450001", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 57, 128, 0}, 30, 5, "0.12345", 15},
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{[]byte{128, 0, 0, 0, 0, 7, 91, 178, 144, 58, 222, 87, 208, 0, 128, 0}, 30, 20, "0.12345000098765", 14},
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{[]byte{128, 0, 0, 7, 91, 178, 144, 58, 222, 87, 208, 0, 0, 0, 0, 30, 0}, 30, 25, "0.12345000098765", 15},
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{[]byte{128, 0, 128, 0}, 4, 2, "0.0", 2},
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{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
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{[]byte{128, 0, 0, 0, 128, 0}, 7, 3, "0.0", 4},
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{[]byte{128, 0, 0, 0, 0, 128, 0}, 10, 2, "0.0", 5},
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{[]byte{128, 0, 0, 0, 0, 0, 128, 0}, 10, 3, "0.0", 6},
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{[]byte{128, 0, 0, 0, 0, 0, 127, 255}, 13, 2, "0.0", 6},
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{[]byte{127, 255, 255, 255, 243, 255, 121, 59, 127, 255}, 15, 14, "-0.000000012345", 8},
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{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 243, 252, 128, 0}, 20, 10, "-0.0000000123", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 127, 255}, 30, 5, "0.0", 15},
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{[]byte{127, 255, 255, 255, 255, 255, 255, 255, 243, 235, 111, 183, 93, 178, 127, 255}, 30, 20, "-0.00000001234500009877", 14},
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{[]byte{127, 255, 255, 255, 255, 255, 243, 235, 111, 183, 93, 255, 139, 69, 47, 30, 0}, 30, 25, "-0.000000012345000098765", 15},
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{[]byte{227, 99, 129, 134}, 4, 2, "99.99", 2},
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{[]byte{129, 134, 159, 167, 15}, 5, 0, "99999.0", 3},
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{[]byte{167, 15, 3, 231, 133, 245}, 7, 3, "9999.999", 4},
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{[]byte{133, 245, 224, 255, 99, 128, 152}, 10, 2, "99999999.99", 5},
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{[]byte{128, 152, 150, 127, 3, 231, 227, 59}, 10, 3, "9999999.999", 6},
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{[]byte{227, 59, 154, 201, 255, 99, 137, 59}, 13, 2, "99999999999.99", 6},
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{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 137, 59}, 15, 14, "9.99999999999999", 8},
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{[]byte{137, 59, 154, 201, 255, 59, 154, 201, 255, 9, 128, 0}, 20, 10, "9999999999.9999999999", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 4, 210, 29, 205, 139, 148, 0, 195, 80, 137, 59}, 30, 5, "1234500009876.5", 15},
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{[]byte{137, 59, 154, 201, 255, 59, 154, 201, 255, 59, 154, 201, 255, 99, 129, 134}, 30, 20, "9999999999.99999999999999999999", 14},
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{[]byte{129, 134, 159, 59, 154, 201, 255, 59, 154, 201, 255, 0, 152, 150, 127, 30, 0}, 30, 25, "99999.9999999999999999999999999", 15},
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{[]byte{227, 99, 129, 134}, 4, 2, "99.99", 2},
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{[]byte{129, 134, 159, 167, 15}, 5, 0, "99999.0", 3},
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{[]byte{167, 15, 3, 231, 133, 245}, 7, 3, "9999.999", 4},
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{[]byte{133, 245, 224, 255, 99, 128, 152}, 10, 2, "99999999.99", 5},
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{[]byte{128, 152, 150, 127, 3, 231, 128, 6}, 10, 3, "9999999.999", 6},
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{[]byte{128, 6, 159, 107, 199, 11, 137, 59}, 13, 2, "111111111.11", 6},
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{[]byte{137, 59, 154, 201, 255, 1, 134, 159, 128, 6}, 15, 14, "9.99999999999999", 8},
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{[]byte{128, 6, 159, 107, 199, 6, 142, 119, 128, 0, 128, 0}, 20, 10, "111111111.11", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 6, 159, 107, 199, 0, 42, 248, 128, 6}, 30, 5, "111111111.11", 15},
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{[]byte{128, 6, 159, 107, 199, 6, 142, 119, 128, 0, 0, 0, 0, 0, 129, 134}, 30, 20, "111111111.11", 14},
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{[]byte{129, 134, 159, 59, 154, 201, 255, 59, 154, 201, 255, 0, 152, 150, 127, 10, 0}, 30, 25, "99999.9999999999999999999999999", 15},
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{[]byte{128, 1, 128, 0}, 4, 2, "0.01", 2},
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{[]byte{128, 0, 0, 128, 0}, 5, 0, "0.0", 3},
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{[]byte{128, 0, 0, 10, 128, 0}, 7, 3, "0.01", 4},
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{[]byte{128, 0, 0, 0, 1, 128, 0}, 10, 2, "0.01", 5},
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{[]byte{128, 0, 0, 0, 0, 10, 128, 0}, 10, 3, "0.01", 6},
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{[]byte{128, 0, 0, 0, 0, 1, 128, 0}, 13, 2, "0.01", 6},
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{[]byte{128, 0, 152, 150, 128, 0, 0, 0, 128, 0}, 15, 14, "0.01", 8},
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{[]byte{128, 0, 0, 0, 0, 0, 152, 150, 128, 0, 128, 0}, 20, 10, "0.01", 10},
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{[]byte{128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 232, 128, 0}, 30, 5, "0.01", 15},
|
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{[]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)
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -19,8 +19,8 @@ func TestDecimal(t *testing.T) {
|
||||
"99.9",
|
||||
},
|
||||
"6,2": {
|
||||
"0.00",
|
||||
"1.00",
|
||||
"0.0",
|
||||
"1.0",
|
||||
"1.33",
|
||||
"10.16",
|
||||
"620.99",
|
||||
@ -28,18 +28,17 @@ func TestDecimal(t *testing.T) {
|
||||
"9999.99",
|
||||
},
|
||||
"10,4": {
|
||||
"0.0000",
|
||||
"0.0",
|
||||
"1.0001",
|
||||
"1.3301",
|
||||
"10.1600",
|
||||
"10.16",
|
||||
"620.9999",
|
||||
"500000.0001",
|
||||
"999999.9999",
|
||||
},
|
||||
"30,10": {
|
||||
// NOTE: At certain length there's undesired zero fill :/
|
||||
"0000000000000000000.0000000000",
|
||||
"0000000000000000001.0000000001",
|
||||
"0.0",
|
||||
"1.0000000001",
|
||||
"99999999999999999999.9999999999",
|
||||
},
|
||||
}
|
||||
@ -51,11 +50,11 @@ func TestDecimal(t *testing.T) {
|
||||
|
||||
for _, v := range vals {
|
||||
t.Run(v, func(t *testing.T) {
|
||||
suite.insertAndCompare(t, tbl, v)
|
||||
suite.insertAndCompare(t, tbl, mysql.NewDecimal(v))
|
||||
})
|
||||
if !strings.HasPrefix(v, "0") {
|
||||
t.Run("-"+v, func(t *testing.T) {
|
||||
suite.insertAndCompare(t, tbl, "-"+v)
|
||||
suite.insertAndCompare(t, tbl, mysql.NewDecimal("-"+v))
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
@ -2,6 +2,7 @@ package tests
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"database/sql"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
@ -201,9 +202,10 @@ func (s *testSuite) insertAndCompareExp(t *testing.T, tbl *table, vals, exps []i
|
||||
func (s *testSuite) expectValue(t *testing.T, tbl *table, exp []interface{}) {
|
||||
t.Helper()
|
||||
out := make(chan []interface{})
|
||||
ctx := context.Background()
|
||||
go func() {
|
||||
for {
|
||||
evt, err := suite.reader.ReadEvent()
|
||||
evt, err := suite.reader.ReadEvent(ctx)
|
||||
if err != nil {
|
||||
t.Errorf("Failed to read event: %v", err)
|
||||
return
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user