Errors refactoring.

client.go

@@ -8,6 +8,13 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"errors"
+)
+
+// Package errors
+var (
+	ErrHttpRequest         = errors.New("point-api: HTTP request error")
+	ErrJsonDeserialization = errors.New("point-api: JSON deserialization error")
 )
 
 type PointToolsClient struct {
@@ -53,13 +60,13 @@ func (c *PointToolsClient) SendPage(page point.Page) (ReceiveAllPageResponse, er
 	body, reqErr := c.client.MakePostRequest(c.apiUrl+"all/page", data, nil)
 
 	if reqErr != nil {
-		return response, reqErr
+		return response, ErrHttpRequest
 	}
 
 	jsonErr := json.Unmarshal(body, &response)
 
 	if jsonErr != nil {
-		return response, jsonErr
+		return response, ErrJsonDeserialization
 	}
 
 	return response, nil