build: remove unused variables and add build constraints for go1.10 and go1.11

- Add a build constraint for go1.13 in `gorm/gorm_test.go`
- Remove unused variable in `mongo/mongodriver/mongodriver.go`
- Remove unused variable in `mongo/mongomgo/mongomgo.go`
- Add an empty import in `postgres/postgres.go`
- Add a test case in `postgres/postgres_test.go`
- Add a build constraint for go1.10 in `session_options_go1.10.go`
- Add a build constraint for go1.11 in `session_options_go1.11.go`
- Remove unused import in `session_options_go1.11.go`
- Add a build constraint for go1.10 in `tester/tester_options_samesite_go1.10.go`
- Add a build constraint for go1.11 in `tester/tester_options_samesite_go1.11.go`

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

Author: appleboy

gorm/gorm_test.go

@@ -1,3 +1,4 @@
+//go:build go1.13
 // +build go1.13
 
 package gorm

mongo/mongodriver/mongodriver.go

@@ -6,9 +6,7 @@ import (
 	"go.mongodb.org/mongo-driver/mongo"
 )
 
-var (
-	_ sessions.Store = (*store)(nil)
-)
+var _ sessions.Store = (*store)(nil)
 
 func NewStore(c *mongo.Collection, maxAge int, ensureTTL bool, keyPairs ...[]byte) sessions.Store {
 	return &store{mongostore.NewMongoStore(c, maxAge, ensureTTL, keyPairs...)}

mongo/mongomgo/mongomgo.go

@@ -6,9 +6,7 @@ import (
 	"github.com/kidstuff/mongostore"
 )
 
-var (
-	_ sessions.Store = (*store)(nil)
-)
+var _ sessions.Store = (*store)(nil)
 
 func NewStore(c *mgo.Collection, maxAge int, ensureTTL bool, keyPairs ...[]byte) sessions.Store {
 	return &store{mongostore.NewMongoStore(c, maxAge, ensureTTL, keyPairs...)}

postgres/postgres.go

@@ -2,6 +2,7 @@ package postgres
 
 import (
 	"database/sql"
+
 	"github.com/antonlindstrom/pgstore"
 	"github.com/gin-contrib/sessions"
 )

postgres/postgres_test.go

@@ -2,9 +2,10 @@ package postgres
 
 import (
 	"database/sql"
+	"testing"
+
 	"github.com/gin-contrib/sessions"
 	"github.com/gin-contrib/sessions/tester"
-	"testing"
 )
 
 const postgresTestServer = "postgres://testuser:testpw@localhost:5432/testdb?sslmode=disable"

session_options_go1.10.go

@@ -1,3 +1,4 @@
+//go:build !go1.11
 // +build !go1.11
 
 package sessions

session_options_go1.11.go

@@ -1,10 +1,12 @@
+//go:build go1.11
 // +build go1.11
 
 package sessions
 
 import (
-	gsessions "github.com/gorilla/sessions"
 	"net/http"
+
+	gsessions "github.com/gorilla/sessions"
 )
 
 // Options stores configuration for a session or session store.

tester/tester_options_samesite_go1.10.go

@@ -1,3 +1,4 @@
+//go:build !go1.11
 // +build !go1.11
 
 package tester

tester/tester_options_samesite_go1.11.go

@@ -1,3 +1,4 @@
+//go:build go1.11
 // +build go1.11
 
 package tester