fix: MarketPrice add UnmarshalJSON

object/market.go

@@ -125,6 +125,28 @@ type MarketPrice struct {
 	OldAmountText string         `json:"old_amount_text"`
 }
 
+// UnmarshalJSON MarketPrice.
+//
+// BUG(VK): unavailable product, in fave.get return [].
+func (m *MarketPrice) UnmarshalJSON(data []byte) error {
+	if bytes.Equal(data, []byte("[]")) {
+		return nil
+	}
+
+	type renamedMarketPrice MarketPrice
+
+	var r renamedMarketPrice
+
+	err := json.Unmarshal(data, &r)
+	if err != nil {
+		return err
+	}
+
+	*m = MarketPrice(r)
+
+	return nil
+}
+
 // MarketSection struct.
 type MarketSection struct {
 	ID   int    `json:"id"`   // Section ID

object/market_test.go

@@ -40,6 +40,25 @@ func TestMarketMarketItem__UnmarshalJSON(t *testing.T) {
 	assert.Error(t, err)
 }
 
+func TestMarketPrice__UnmarshalJSON(t *testing.T) {
+	t.Parallel()
+
+	f := func(data []byte, wantMarket object.MarketPrice) {
+		var market object.MarketPrice
+
+		err := json.Unmarshal(data, &market)
+		assert.NoError(t, err)
+		assert.Equal(t, wantMarket, market)
+	}
+
+	f([]byte("[]"), object.MarketPrice{})
+	f([]byte(`{"text":"a"}`), object.MarketPrice{Text: "a"})
+
+	var market object.MarketPrice
+	err := json.Unmarshal([]byte("0"), &market)
+	assert.Error(t, err)
+}
+
 func TestMarketMarketAlbum_ToAttachment(t *testing.T) {
 	t.Parallel()