Medium blog post - snippet 2

driver.go

import (
	"github.com/neo4j-examples/golang-neo4j-realworld-example/pkg/users"
	"github.com/neo4j/neo4j-go-driver/v4/neo4j"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"golang.org/x/crypto/bcrypt"
	"io"
)

var driver neo4j.Driver
var repository users.UserRepository

var _ = Describe("User repository", func() {
	BeforeEach(func() {
		// [...]
		driver, err = neo4j.NewDriver(address, neo4j.BasicAuth(username, password, ""))
		Expect(err).To(BeNil(), "Driver should be created")
		repository = &users.UserNeo4jRepository{Driver: driver}
	})

	It("logs users in", func() {
		session := driver.NewSession(neo4j.SessionConfig{})
		defer Close(session, "Session") // Close is a function that close any io.Closer
    		// transaction functions can be retried upon failure, use them! :)
		_, err := session.WriteTransaction(func(tx neo4j.Transaction) (interface{}, error) {
			_, err := tx.Run(
				`CREATE (:User {username: "flo", email: $email, password: $password})`, // insert user
				map[string]interface{}{ // set query parameters
					"email":    "florent@example.org",
					"password": hash("sup3rpassw0rd"), // computes a bcrypt hash
				})
			return nil, err
		})
		Expect(err).To(BeNil(), "user should be inserted")

		user, err := repository.FindByEmailAndPassword("florent@example.org", "sup3rpassw0rd")

		// [...] test expectations
	})
})

func Close(closer io.Closer, resourceName string) {
	Expect(closer.Close()).
		To(BeNil(), "%s should close", resourceName)
}

func hash(password string) string {
	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
	Expect(err).To(BeNil(), "password should be hashed")
	return string(hashedPassword)
}