Enables circle ci integration test and linter errors fix

Author: lawRathod

.circleci/config.yml

@@ -21,34 +21,22 @@ jobs:
       - run: make lint
 
   integration:
-    docker:
-      - image: golang:1.16
+    machine:
+      image: ubuntu-2004:202104-01 
     steps:
       - checkout
       - run:
-          name: "Prebuild"
-          command: |
-            echo "Prebuild..."
-      - run:
-          name: "Launch background processes"
-          background: true
-          command: |
-            echo "Starting executables we need in background"
-      - run:
-          name: "Give time for processes to start"
-          command: sleep 3
-      - run:
-          name: "Run tests"
+          name: "Run database tests"
           command: |
-            make test_integration
+            make test-database-services
 
 workflows:
   version: 2
   build_all:
     jobs:
       - build
       - checks
-#      - integration:
-#          requires:
-#            - build
-#            - checks
+      - integration:
+          requires:
+            - build
+            - checks

connections/database/mongoDB.go

@@ -11,10 +11,6 @@ import (
 	"go.mongodb.org/mongo-driver/mongo/readpref"
 )
 
-type MongoConnection struct {
-	db *mongo.Client
-}
-
 func (c *DBQueryClient) Connect() error {
 	uri := os.Getenv("MONGO_URI")
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)

connections/database/mongoDB_test.go

@@ -19,7 +19,7 @@ func TestBuffer_InsertRead(t *testing.T) {
 	}
 
 	coll := c.Client.Database("test").Collection("sample")
-	res, err := coll.InsertOne(context.TODO(), bson.D{{Key: "name",Value: "Alice"}})
+	res, err := coll.InsertOne(context.TODO(), bson.D{{Key: "name", Value: "Alice"}})
 	if err != nil {
 		fmt.Println(err)
 		t.Fail()
@@ -29,11 +29,11 @@ func TestBuffer_InsertRead(t *testing.T) {
 	// Find the document for which the _id field matches id.
 	// Specify the Sort option to sort the documents by age.
 	// The first document in the sorted order will be returned.
-	opts := options.FindOne().SetSort(bson.D{{Key: "age",Value: 1}})
+	opts := options.FindOne().SetSort(bson.D{{Key: "age", Value: 1}})
 	var result bson.M
 	readErr := coll.FindOne(
 		context.TODO(),
-		bson.D{{Key: "_id",Value: res.InsertedID}},
+		bson.D{{Key: "_id", Value: res.InsertedID}},
 		opts,
 	).Decode(&result)
 	if readErr != nil {