golang-lib/web/webtest/main.go

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package webtest
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"net/http/httptest"
"strings"
"github.com/gin-gonic/gin"
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"go.uber.org/zap"
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"dev.sum7.eu/genofire/golang-lib/database"
"dev.sum7.eu/genofire/golang-lib/mailer"
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"dev.sum7.eu/genofire/golang-lib/web"
)
var (
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// DBConnection - url to database on setting up default WebService for webtest
DBConnection = "postgresql://root:root@localhost:26257/defaultdb?sslmode=disable"
)
// Option to configure TestServer
type Option struct {
ModuleLoader web.ModuleRegisterFunc
Database bool
DBReRun bool
DBSetup func(db *database.Database)
Mailer bool
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Logger *zap.Logger
}
func (option Option) log() *zap.Logger {
if option.Logger != nil {
return option.Logger
}
return zap.L()
}
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// TestServer - to run it without listen an server
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type TestServer struct {
DB *database.Database
Mails chan *mailer.TestingMail
Close func()
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gin *gin.Engine
WS *web.Service
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lastCookies []*http.Cookie
}
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// Login Request format (maybe just internal usage)
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type Login struct {
Username string `json:"username"`
Password string `json:"password"`
}
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// New starts WebService for testing
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func New(modules web.ModuleRegisterFunc) (*TestServer, error) {
return Option{ModuleLoader: modules}.New()
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}
// NewWithDBSetup allows to reconfigure before ReRun the database - e.g. for adding Migration-Steps
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func NewWithDBSetup(modules web.ModuleRegisterFunc, dbCall func(db *database.Database)) (*TestServer, error) {
return Option{
Database: true,
DBReRun: true,
DBSetup: dbCall,
ModuleLoader: modules,
}.New()
}
// New allows to configure WebService for testing
func (option Option) New() (*TestServer, error) {
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log := option.log()
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ws := &web.Service{}
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ws.SetLog(log)
ws.Session.Name = "mysession"
ws.Session.Secret = "hidden"
ts := &TestServer{
WS: ws,
Close: func() {},
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}
// db setup
if option.Database {
ts.DB = &database.Database{
Testdata: true,
Debug: false,
LogLevel: 0,
}
ts.DB.Connection.URI = DBConnection
if option.DBSetup != nil {
option.DBSetup(ts.DB)
}
var err error
if option.DBReRun {
err = ts.DB.ReRun()
} else {
err = ts.DB.Run()
}
if err != nil && err != database.ErrNothingToMigrate {
return nil, err
}
if ts.DB.DB == nil {
return nil, database.ErrNotConnected
}
ws.DB = ts.DB.DB
}
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if option.Mailer {
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mock, mail := mailer.NewFakeServer(log)
if err := mail.Setup(); err != nil {
return nil, err
}
ws.Mailer = mail
ts.Mails = mock.Mails
ts.Close = mock.Close
}
// api setup
gin.EnableJsonDecoderDisallowUnknownFields()
gin.SetMode(gin.TestMode)
ws.ModuleRegister(option.ModuleLoader)
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r := gin.Default()
ws.LoadSession(r)
ws.Bind(r)
ts.gin = r
return ts, nil
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}
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// DatabaseForget to run a test without a database
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func (s *TestServer) DatabaseForget() {
s.WS.DB = nil
s.DB = nil
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}
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// Request sends a request to webtest WebService
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func (s *TestServer) Request(method, url string, body interface{}, expectCode int, jsonObj interface{}) error {
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var jsonBody io.Reader
if body != nil {
if strBody, ok := body.(string); ok {
jsonBody = strings.NewReader(strBody)
} else {
jsonBodyArray, err := json.Marshal(body)
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if err != nil {
return err
}
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jsonBody = bytes.NewBuffer(jsonBodyArray)
}
}
req, err := http.NewRequest(method, url, jsonBody)
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if err != nil {
return err
}
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if len(s.lastCookies) > 0 {
for _, c := range s.lastCookies {
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req.AddCookie(c)
}
}
w := httptest.NewRecorder()
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s.gin.ServeHTTP(w, req)
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// valid statusCode
if expectCode != w.Code {
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return fmt.Errorf("wrong status code, body: %v", w.Body)
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}
if jsonObj != nil {
// fetch JSON
err = json.NewDecoder(w.Body).Decode(jsonObj)
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if err != nil {
return err
}
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}
result := w.Result()
if result != nil {
cookies := result.Cookies()
if len(cookies) > 0 {
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s.lastCookies = cookies
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}
}
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return nil
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}
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// Login to API by send request
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func (s *TestServer) Login(login Login) error {
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// POST: correct login
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return s.Request(http.MethodPost, "/api/v1/auth/login", &login, http.StatusOK, nil)
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}
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// TestLogin to API by default login data
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func (s *TestServer) TestLogin() error {
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return s.Login(Login{
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Username: "admin",
Password: "CHANGEME",
})
}