howmuch/internal/pkg/middleware/authn/authn_test.go

// MIT License
//
// Copyright (c) 2024 vinchent <vinchent@vinchent.xyz>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package authn

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"testing"
	"time"

	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/errno"
	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/shared"
	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/test"
	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/token"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
)

var loggedOutID string

type testCache struct{}

func (tc *testCache) Get(ctx context.Context, key string) (string, error) {
	loggedOutKey := fmt.Sprintf("jwt:%s", loggedOutID)
	if key == loggedOutKey {
		return "found", nil
	}
	return "", nil
}

func (c *testCache) Set(
	ctx context.Context,
	key string,
	value interface{},
	expiration time.Duration,
) error {
	return nil
}

func (c *testCache) Close() error {
	return nil
}

func TestAuthn(t *testing.T) {
	token.Init("secret", 1*time.Second)
	tk, _ := token.Sign("user")

	tkParsed, _ := token.Parse(tk)
	loggedOutID = tkParsed.Identity

	cache := &testCache{}

	t.Run("token found in cache", func(t *testing.T) {
		r := gin.New()
		r.Use(Authn(cache))

		r.GET("/example", func(c *gin.Context) {
			c.Status(http.StatusOK)
		})
		res := test.PerformRequest(
			t,
			r,
			"GET",
			"/example",
			nil,
			test.Header{Key: shared.XUserName, Value: "user"},
			test.Header{Key: "Authorization", Value: fmt.Sprintf("Bearer %s", tk)},
		)
		assert.Equal(t, http.StatusUnauthorized, res.Result().StatusCode, res.Body)

		var err errno.Errno
		json.NewDecoder(res.Result().Body).Decode(&err)
		assert.Equal(t, "AuthFailure.LoggedOut", err.Code)
	})

	t.Run("token not found in cache", func(t *testing.T) {
		newTk, _ := token.Sign("user2")
		r := gin.New()
		r.Use(Authn(cache))

		r.GET("/example", func(c *gin.Context) {
			c.Status(http.StatusOK)
		})
		res := test.PerformRequest(
			t,
			r,
			"GET",
			"/example",
			nil,
			test.Header{Key: shared.XUserName, Value: "user2"},
			test.Header{Key: "Authorization", Value: fmt.Sprintf("Bearer %s", newTk)},
		)
		assert.Equal(t, http.StatusOK, res.Result().StatusCode, res.Body)
	})
}