web-app-template/main_test.go

package main

import (
	"context"
	"database/sql"
	"fmt"
	"net/http"
	"net/url"
	"strings"
	"sync/atomic"
	"testing"
	"time"

	"me-fit/service"
	"me-fit/types"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"golang.org/x/net/html"
)

var (
	httpClient = http.Client{
		// Disable redirect following
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}

	port atomic.Int32
)

func TestIntegrationSecurityHeader(t *testing.T) {
	t.Parallel()
	t.Run("should keep caching for static content", func(t *testing.T) {
		t.Parallel()

		_, basePath, ctx := setupIntegrationTest(t)

		req, err := http.NewRequestWithContext(ctx, "GET", basePath+"/static/favicon.svg", nil)
		assert.Nil(t, err)

		resp, err := httpClient.Do(req)
		assert.Nil(t, err)

		cacheControl := resp.Header.Get("Cache-Control")
		assert.Equal(t, "", cacheControl)
	})
	t.Run("should disable caching for dynamic content", func(t *testing.T) {
		t.Parallel()

		_, basePath, ctx := setupIntegrationTest(t)

		req, err := http.NewRequestWithContext(ctx, "GET", basePath, nil)
		assert.Nil(t, err)

		resp, err := httpClient.Do(req)
		assert.Nil(t, err)

		cacheControl := resp.Header.Get("Cache-Control")
		assert.Equal(t, "no-cache, no-store, must-revalidate", cacheControl)
	})
	t.Run("should include security headers", func(t *testing.T) {
		t.Parallel()

		_, basePath, ctx := setupIntegrationTest(t)

		req, err := http.NewRequestWithContext(ctx, "GET", basePath, nil)
		assert.Nil(t, err)

		resp, err := httpClient.Do(req)
		assert.Nil(t, err)

		value := resp.Header.Get("X-Content-Type-Options")
		assert.Equal(t, "nosniff", value)

		value = resp.Header.Get("Access-Control-Allow-Origin")
		assert.Equal(t, basePath, value)

		value = resp.Header.Get("Access-Control-Allow-Methods")
		assert.Equal(t, "GET, POST, DELETE", value)

		value = resp.Header.Get("Content-Security-Policy")
		assert.Equal(t, "default-src 'none'; "+
			"script-src 'self' https://umami.me-fit.eu; "+
			"connect-src 'self' https://umami.me-fit.eu; "+
			"img-src 'self'; "+
			"style-src 'self'; "+
			"form-action 'self'; "+
			"frame-ancestors 'none';", value)

		value = resp.Header.Get("Cross-Origin-Resource-Policy")
		assert.Equal(t, "same-origin", value)

		value = resp.Header.Get("Cross-Origin-Opener-Policy")
		assert.Equal(t, "same-origin", value)

		value = resp.Header.Get("Cross-Origin-Embedder-Policy")
		assert.Equal(t, "require-corp", value)

		value = resp.Header.Get("Permissions-Policy")
		assert.Equal(t, "geolocation=(), camera=(), microphone=(), interest-cohort=()", value)

		value = resp.Header.Get("Referrer-Policy")
		assert.Equal(t, "strict-origin-when-cross-origin", value)

		value = resp.Header.Get("Strict-Transport-Security")
		assert.Equal(t, "max-age=63072000; includeSubDomains; preload", value)
	})
}

func TestIntegrationAuth(t *testing.T) {
	t.Parallel()

	t.Run("should return secure cookie on signin with generated csrf-token and session-id", func(t *testing.T) {
		t.Parallel()

		db, basePath, ctx := setupIntegrationTest(t)

		pass := service.GetHashPassword("password", []byte("salt"))
		_, err := db.Exec(`
			INSERT INTO user (user_id, email, email_verified, is_admin, password, salt, created_at) 
			VALUES (?, "mail@mail.de", FALSE, FALSE, ?, ?, datetime())`, uuid.New(), pass, []byte("salt"))
		assert.Nil(t, err)

		req, err := http.NewRequestWithContext(ctx, "GET", basePath+"/auth/signin", nil)
		assert.Nil(t, err)

		resp, err := httpClient.Do(req)
		assert.Nil(t, err)

		html, err := html.Parse(resp.Body)
		assert.Nil(t, err)

		csrfToken := findCsrfToken(html)
		assert.NotEqual(t, "", csrfToken)
		anonymousSession := findCookie(resp, "id")
		assert.NotNil(t, anonymousSession)

		formData := url.Values{
			"email":      {"mail@mail.de"},
			"password":   {"password"},
			"csrf-token": {csrfToken},
		}

		req, err = http.NewRequestWithContext(ctx, "POST", basePath+"/api/auth/signin", strings.NewReader(formData.Encode()))
		assert.Nil(t, err)
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
		req.Header.Set("Cookie", "id="+anonymousSession.Value)

		resp, err = httpClient.Do(req)
		assert.Nil(t, err)

		assert.Equal(t, http.StatusSeeOther, resp.StatusCode)

		cookie := findCookie(resp, "id")
		assert.NotNil(t, cookie)
		assert.Equal(t, http.SameSiteStrictMode, cookie.SameSite, "Cookie is not secure")
		assert.True(t, cookie.HttpOnly, "Cookie is not secure")
		assert.True(t, cookie.Secure, "Cookie is not secure")
	})
	t.Run("should change password and invalidate other sessions from user", func(t *testing.T) {
		t.Parallel()

		db, basePath, ctx := setupIntegrationTest(t)
		userId := uuid.New()
		userIdOther := uuid.New()

		pass := service.GetHashPassword("password", []byte("salt"))
		_, err := db.Exec(`
			INSERT INTO user (user_id, email, email_verified, is_admin, password, salt, created_at) 
			VALUES (?, "mail@mail.de", FALSE, FALSE, ?, ?, datetime())`, userId, pass, []byte("salt"))

		sessionId := "session-id"
		assert.Nil(t, err)
		_, err = db.Exec(`
			INSERT INTO session (session_id, user_id, created_at, expires_at)
			VALUES (?, ?, datetime(), datetime("now", "+1 day"))`, sessionId, userId)
		assert.Nil(t, err)
		_, err = db.Exec(`
			INSERT INTO session (session_id, user_id, created_at, expires_at)
			VALUES ("second", ?, datetime(), datetime("now", "+1 day"))`, userId)
		assert.Nil(t, err)
		_, err = db.Exec(`
			INSERT INTO session (session_id, user_id, created_at, expires_at)
			VALUES ("other", ?, datetime(), datetime("now", "+1 day"))`, userIdOther)
		assert.Nil(t, err)

		req, err := http.NewRequestWithContext(ctx, "GET", basePath+"/auth/change-password", nil)
		assert.Nil(t, err)
		req.Header.Set("Cookie", "id="+sessionId)
		resp, err := httpClient.Do(req)
		assert.Nil(t, err)

		html, err := html.Parse(resp.Body)
		assert.Nil(t, err)

		csrfToken := findCsrfToken(html)
		assert.NotEqual(t, "", csrfToken)

		formData := url.Values{
			"current-password": {"password"},
			"new-password":     {"MyNewSecurePassword1!"},
			"csrf-token":       {csrfToken},
		}

		req, err = http.NewRequestWithContext(ctx, "POST", basePath+"/api/auth/change-password", strings.NewReader(formData.Encode()))
		assert.Nil(t, err)
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
		req.Header.Set("Cookie", "id="+sessionId)
		req.Header.Set("HX-Request", "true")
		resp, err = httpClient.Do(req)
		assert.Nil(t, err)

		assert.Equal(t, http.StatusOK, resp.StatusCode)

		var sessionIds []string
		sessions, err := db.Query("SELECT session_id FROM session ORDER BY session_id")
		assert.Nil(t, err)
		for sessions.Next() {
			var sessionId string
			err = sessions.Scan(&sessionId)
			assert.Nil(t, err)
			sessionIds = append(sessionIds, sessionId)
		}

		assert.Equal(t, 2, len(sessionIds))
		assert.Equal(t, "other", sessionIds[0])
		assert.Equal(t, "session-id", sessionIds[1])
	})
	t.Run("should forget password and invalidate other sessions from user", func(t *testing.T) {
		t.Parallel()

		db, basePath, ctx := setupIntegrationTest(t)
		userId := uuid.New()

		pass := service.GetHashPassword("password", []byte("salt"))
		_, err := db.Exec(`
			INSERT INTO user (user_id, email, email_verified, is_admin, password, salt, created_at) 
			VALUES (?, "mail@mail.de", FALSE, FALSE, ?, ?, datetime())`, userId, pass, []byte("salt"))

		sessionId := "session-id"
		assert.Nil(t, err)
		_, err = db.Exec(`
			INSERT INTO session (session_id, user_id, created_at, expires_at)
			VALUES (?, ?, datetime(), datetime("now", "+1 day"))`, sessionId, userId)
		assert.Nil(t, err)
		_, err = db.Exec(`
			INSERT INTO session (session_id, user_id, created_at, expires_at)
			VALUES ("second", ?, datetime(), datetime("now", "+1 day"))`, userId)
		assert.Nil(t, err)

		req, err := http.NewRequestWithContext(ctx, "GET", basePath+"/auth/change-password", nil)
		assert.Nil(t, err)
		req.Header.Set("Cookie", "id="+sessionId)
		resp, err := httpClient.Do(req)
		assert.Nil(t, err)

		html, err := html.Parse(resp.Body)
		assert.Nil(t, err)

		csrfToken := findCsrfToken(html)
		assert.NotEqual(t, "", csrfToken)

		formData := url.Values{
			"current-password": {"password"},
			"new-password":     {"MyNewSecurePassword1!"},
			"csrf-token":       {csrfToken},
		}

		req, err = http.NewRequestWithContext(ctx, "POST", basePath+"/api/auth/change-password", strings.NewReader(formData.Encode()))
		assert.Nil(t, err)
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
		req.Header.Set("Cookie", "id="+sessionId)
		req.Header.Set("HX-Request", "true")
		resp, err = httpClient.Do(req)
		assert.Nil(t, err)

		assert.Equal(t, http.StatusOK, resp.StatusCode)

		var sessionIds []string
		sessions, err := db.Query("SELECT session_id FROM session ORDER BY session_id")
		assert.Nil(t, err)
		for sessions.Next() {
			var sessionId string
			err = sessions.Scan(&sessionId)
			assert.Nil(t, err)
			sessionIds = append(sessionIds, sessionId)
		}

		assert.Equal(t, 2, len(sessionIds))
		assert.Equal(t, "other", sessionIds[0])
		assert.Equal(t, "session-id", sessionIds[1])
	})
}

func findCookie(resp *http.Response, name string) *http.Cookie {
	for _, cookie := range resp.Cookies() {
		if cookie.Name == name {
			return cookie
		}
	}

	return nil
}

func setupIntegrationTest(t *testing.T) (db *sql.DB, basePath string, ctx context.Context) {
	ctx, done := context.WithCancel(context.Background())
	t.Cleanup(done)

	db, err := sql.Open("sqlite3", ":memory:")
	if err != nil {
		t.Fatalf("Could not open Database data.db: %v", err)
	}
	t.Cleanup(func() {
		db.Close()
	})

	testPort := port.Add(1)
	testPort += 1024

	go run(ctx, db, getEnv(testPort))

	basePath = "http://localhost:" + fmt.Sprint(testPort)

	err = waitForReady(ctx, 5*time.Second, basePath, t)
	assert.Nil(t, err)

	return db, basePath, ctx
}

func getEnv(port int32) func(string) string {
	return func(key string) string {
		if key == "PORT" {
			return fmt.Sprint(port)
		} else if key == "SMTP_ENABLED" {
			return "false"
		} else if key == "PROMETHEUS_ENABLED" {
			return "false"
		} else if key == "BASE_URL" {
			return "http://localhost:" + fmt.Sprint(port)
		} else if key == "ENVIRONMENT" {
			return "test"
		} else {
			return ""
		}
	}
}

// waitForReady calls the specified endpoint until it gets a 200
// response or until the context is cancelled or the timeout is
// reached.
func waitForReady(
	ctx context.Context,
	timeout time.Duration,
	endpoint string,
	t *testing.T,
) error {
	client := http.Client{}
	startTime := time.Now()
	for {
		req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
		assert.Nil(t, err)

		resp, err := client.Do(req)
		if err == nil && resp.StatusCode == http.StatusOK {
			resp.Body.Close()
			return nil
		} else if err == nil {
			resp.Body.Close()
		}

		select {
		case <-ctx.Done():
			return ctx.Err()
		default:
			if time.Since(startTime) >= timeout {
				t.Fatal("timeout reached while waiting for endpoint")
				return types.ErrInternal
			}
			// wait a little while between checks
			time.Sleep(250 * time.Millisecond)
		}
	}
}

func findCsrfToken(data *html.Node) string {
	attr := getTokenAttribute(data)
	if attr != nil {
		return attr.Val
	}

	if data.FirstChild != nil {
		if token := findCsrfToken(data.FirstChild); token != "" {
			return token
		}
	}
	if data.NextSibling != nil {
		if token := findCsrfToken(data.NextSibling); token != "" {
			return token
		}
	}

	return ""
}

func getTokenAttribute(data *html.Node) *html.Attribute {
	returnValue := false
	for _, attr := range data.Attr {
		if attr.Key == "name" && attr.Val == "csrf-token" {
			returnValue = true
		}
	}

	if !returnValue {
		return nil
	}

	for _, attr := range data.Attr {
		if attr.Key == "value" {
			return &attr
		}
	}

	return nil
}