add get available promotions method

ozon/promotions_test.go

@@ -0,0 +1,56 @@
+package ozon
+
+import (
+	"net/http"
+	"testing"
+
+	core "github.com/diphantxm/ozon-api-client"
+)
+
+func TestGetAvailablePromotions(t *testing.T) {
+	tests := []struct {
+		statusCode int
+		headers    map[string]string
+		response   string
+	}{
+		{
+			http.StatusOK,
+			map[string]string{"Client-Id": "my-client-id", "Api-Key": "my-api-key"},
+			`{
+				"result": [
+				  {
+					"id": 71342,
+					"title": "test voucher #2",
+					"date_start": "2021-11-22T09:46:38Z",
+					"date_end": "2021-11-30T20:59:59Z",
+					"potential_products_count": 0,
+					"is_participating": true,
+					"participating_products_count": 5,
+					"description": "",
+					"action_type": "DISCOUNT",
+					"banned_products_count": 0,
+					"with_targeting": false,
+					"discount_type": "UNKNOWN",
+					"discount_value": 0,
+					"order_amount": 0,
+					"freeze_date": "",
+					"is_voucher_action": true
+				  }
+				]
+			}`,
+		},
+	}
+
+	for _, test := range tests {
+		c := NewMockClient(core.NewMockHttpHandler(test.statusCode, test.response, test.headers))
+
+		resp, err := c.GetAvailablePromotions()
+		if err != nil {
+			t.Error(err)
+		}
+
+		if resp.StatusCode != test.statusCode {
+			t.Errorf("got wrong status code: got: %d, expected: %d", resp.StatusCode, test.statusCode)
+		}
+	}
+}