feat(core): add String method to scw.Money

scw/custom_types.go

@@ -6,7 +6,10 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"strings"
 	"time"
+
+	"github.com/scaleway/scaleway-sdk-go/logger"
 )
 
 // ServiceInfo contains API metadata
@@ -82,6 +85,25 @@ func NewMoneyFromFloat(value float64, currency string) *Money {
 	}
 }
 
+// String returns the string representation of Money.
+func (m *Money) String() string {
+	currencySignsByCodes := map[string]string{
+		"EUR": "€",
+		"USD": "$",
+	}
+
+	currencySign, currencySignFound := currencySignsByCodes[m.CurrencyCode]
+	if !currencySignFound {
+		logger.Debugf("%s currency code is not supported", m.CurrencyCode)
+		currencySign = m.CurrencyCode
+	}
+
+	cents := fmt.Sprintf("%09d", m.Nanos)
+	cents = cents[:2] + strings.TrimRight(cents[2:], "0")
+
+	return fmt.Sprintf("%s %d.%s", currencySign, m.Units, cents)
+}
+
 // ToFloat converts a Money object to a float.
 func (m *Money) ToFloat() float64 {
 	return float64(m.Units) + float64(m.Nanos)/1000000000

scw/custom_types_test.go

@@ -11,6 +11,62 @@ import (
 	"github.com/scaleway/scaleway-sdk-go/internal/testhelpers"
 )
 
+func TestMoney_String(t *testing.T) {
+	cases := []struct {
+		money Money
+		want  string
+	}{
+		{
+			money: Money{
+				CurrencyCode: "EUR",
+				Units:        10,
+			},
+			want: "€ 10.00",
+		},
+		{
+			money: Money{
+				CurrencyCode: "USD",
+				Units:        10,
+				Nanos:        1,
+			},
+			want: "$ 10.000000001",
+		},
+		{
+			money: Money{
+				CurrencyCode: "EUR",
+				Nanos:        100000000,
+			},
+			want: "€ 0.10",
+		},
+		{
+			money: Money{
+				CurrencyCode: "EUR",
+				Nanos:        500000,
+			},
+			want: "€ 0.0005",
+		},
+		{
+			money: Money{
+				CurrencyCode: "EUR",
+				Nanos:        123456789,
+			},
+			want: "€ 0.123456789",
+		},
+		{
+			money: Money{
+				CurrencyCode: "?",
+			},
+			want: "? 0.00",
+		},
+	}
+
+	for _, c := range cases {
+		t.Run(c.want, func(t *testing.T) {
+			testhelpers.Equals(t, c.want, c.money.String())
+		})
+	}
+}
+
 func TestSize_String(t *testing.T) {
 	cases := []struct {
 		size Size