Added test for card formatting

internal/cardsinfo/format_test.go

@@ -0,0 +1,17 @@
+package cardsinfo
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestFormatCardPrices(t *testing.T) {
+	formatted := FormatCardPrices("card", []CardPrice{
+		&ScgCardPrice{
+			Price:   "1.5$",
+			Edition: "ED",
+			Link:    "scg.com",
+		},
+	})
+	assert.Equal(t, "Оригинальное название: card\nРезультатов: 1\n1. ED: 1.5$\nscg.com\n", formatted)
+}