Add some unit-tests for numeric

postgres/numeric/numeric.go

@@ -17,6 +17,19 @@ func Zero() Numeric {
 	return Numeric{pgtype.Numeric{Exp: 0, Int: big.NewInt(0), Status: pgtype.Present, NaN: false}}
 }
 
+func FromInt64(value int64) Numeric {
+	num := Numeric{}
+	num.Set(value)
+	return num
+}
+
+func FromInt64WithExp(value int64, exp int32) Numeric {
+	num := Numeric{}
+	num.Set(value)
+	num.Exp = exp
+	return num
+}
+
 func (n Numeric) GetFloat64() float64 {
 	if n.Status != pgtype.Present {
 		return 0
@@ -168,10 +181,16 @@ func (n Numeric) MarshalJSON() ([]byte, error) {
 	return bytesWithSeparator, nil
 }
 
-func Parse(text string) (Numeric, error) {
-	// Remove trailing currency
-	text = trimLastChar(text)
+func MustParse(text string) Numeric {
+	num, err := Parse(text)
+	if err != nil {
+		panic(err)
+	}
 
+	return num
+}
+
+func Parse(text string) (Numeric, error) {
 	// Unify decimal separator
 	text = strings.Replace(text, ",", ".", 1)
 
@@ -184,6 +203,13 @@ func Parse(text string) (Numeric, error) {
 	return num, nil
 }
 
+func ParseCurrency(text string) (Numeric, error) {
+	// Remove trailing currency
+	text = trimLastChar(text)
+
+	return Parse(text)
+}
+
 func trimLastChar(s string) string {
 	r, size := utf8.DecodeLastRuneInString(s)
 	if r == utf8.RuneError && (size == 0 || size == 1) {