fix lint problem and test unmarshal message webhook

v1/storage.go

@@ -9,16 +9,16 @@ import (
 
 const mgClientCacheTTL = time.Hour * 1
 
-var NegativeCapacity = errors.New("capacity cannot be less than 1")
+var ErrNegativeCapacity = errors.New("capacity cannot be less than 1")
 
 type MGClientPool struct {
 	cache *otter.CacheWithVariableTTL[string, *MgClient]
 }
 
-// NewMGClientPool initializes the client cache
+// NewMGClientPool initializes the client cache.
 func NewMGClientPool(capacity int) (*MGClientPool, error) {
 	if capacity <= 0 {
-		return nil, NegativeCapacity
+		return nil, ErrNegativeCapacity
 	}
 
 	cache, _ := otter.MustBuilder[string, *MgClient](capacity).WithVariableTTL().Build()

v1/storage_test.go

@@ -1,8 +1,9 @@
 package v1
 
 import (
-	"github.com/stretchr/testify/suite"
 	"testing"
+
+	"github.com/stretchr/testify/suite"
 )
 
 type StorageTest struct {
@@ -26,5 +27,5 @@ func (t *StorageTest) Test_MGClientPool() {
 
 func (t *StorageTest) Test_NegativeCapacity() {
 	_, err := NewMGClientPool(-1)
-	t.Assert().Equal(NegativeCapacity.Error(), err.Error())
+	t.Assert().Equal(ErrNegativeCapacity.Error(), err.Error())
 }

v1/types_test.go

@@ -306,22 +306,19 @@ func TestUnmarshalMessageWebhook(t *testing.T) {
 		},
 		"template": {
 		  "code": "f87e678f_660b_461a_b60a_a6194e2e9094#thanks_for_order#ru",
-		  "args": [
-			"8061C",
-			"17400"
-		  ],
-		  "variables": {
-			"body": [
-			  "8061C",
-			  "17400"
-			],
-			"buttons": [
-			  [],
-			  [
-				"8061"
-			  ]
-			]
-		  }
+          "variables": {
+		  	"body": {
+				"args": [
+					"8061C",
+			  		"17400"
+				]
+			},
+		  	"buttons": [{
+				"args": [
+					"8061"
+				]
+        	}]
+          }
 		},
 		"attachments": {
 		  "suggestions": [