tests: add tests for `chaoscenter/authentication/api/middleware/jwt_m…

…iddlware.go` (#4574)

* Add unit tests for JwtMiddleware in jwt_middleware_test.go

Signed-off-by: ChaitanyaD48 <chaitanya.d48@gmail.com>

* Ordering of Imports Updated

Signed-off-by: ChaitanyaD48 <chaitanya.d48@gmail.com>

* Ordering of Imports Updated

Signed-off-by: ChaitanyaD48 <chaitanya.d48@gmail.com>

---------

Signed-off-by: ChaitanyaD48 <chaitanya.d48@gmail.com>
Co-authored-by: Saranya Jena <saranya.jena@harness.io>

chaoscenter/authentication/api/middleware/jwt_middlware_test.go

@@ -0,0 +1,125 @@
+package middleware_test
+
+import (
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt"
+	"github.com/litmuschaos/litmus/chaoscenter/authentication/api/middleware"
+	"github.com/litmuschaos/litmus/chaoscenter/authentication/api/mocks"
+	"github.com/litmuschaos/litmus/chaoscenter/authentication/pkg/utils"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestJwtMiddleware(t *testing.T) {
+	router := gin.Default()
+	mockService := new(mocks.MockedApplicationService)
+	router.Use(middleware.JwtMiddleware(mockService))
+
+	router.GET("/status", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{"message": "Access Granted"})
+	})
+
+	createRequest := func(token string) *httptest.ResponseRecorder {
+		req := httptest.NewRequest("GET", "/status", nil)
+		req.Header.Set("Authorization", "Bearer "+token)
+		w := httptest.NewRecorder()
+		return w
+	}
+
+	t.Run("Valid Token", func(t *testing.T) {
+		wValid := createRequest("jwtstring")
+		assert.Equal(t, http.StatusOK, wValid.Code)
+	})
+
+	t.Run("Missing Authorization Header", func(t *testing.T) {
+		wMissingHeader := httptest.NewRecorder()
+		reqMissingHeader := httptest.NewRequest("GET", "/status", nil)
+		router.ServeHTTP(wMissingHeader, reqMissingHeader)
+		assert.Equal(t, http.StatusUnauthorized, wMissingHeader.Code)
+	})
+}
+
+func TestJwtMiddleware_SetClaimsAndCallNextHandler(t *testing.T) {
+	router := gin.Default()
+
+	mockService := new(mocks.MockedApplicationService)
+	router.Use(middleware.JwtMiddleware(mockService))
+
+	router.GET("/status", func(c *gin.Context) {
+		username, _ := c.Get("username")
+		uid, _ := c.Get("uid")
+		role, _ := c.Get("role")
+		assert.Equal(t, "testuser", username)
+		assert.Equal(t, "12345", uid)
+		assert.Equal(t, "admin", role)
+		c.JSON(http.StatusOK, gin.H{"message": "Access Granted"})
+	})
+
+	mockService.On("ValidateToken", "jwtstring").Return(&jwt.Token{
+		Valid: true,
+		Claims: jwt.MapClaims{
+			"username": "testuser",
+			"uid":      "12345",
+			"role":     "admin",
+		},
+	}, nil)
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/status", nil)
+	req.Header.Set("Authorization", "Bearer jwtstring")
+	router.ServeHTTP(w, req)
+	assert.Equal(t, http.StatusOK, w.Code)
+}
+
+func TestJwtMiddleware_TokenValidationFailure(t *testing.T) {
+	router := gin.Default()
+
+	mockService := new(mocks.MockedApplicationService)
+	router.Use(middleware.JwtMiddleware(mockService))
+
+	router.GET("/status", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{"message": "Access Granted"})
+	})
+
+	mockService.On("ValidateToken", "invalidtoken").Return(&jwt.Token{
+		Valid: false,
+	}, nil)
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/status", nil)
+	req.Header.Set("Authorization", "Bearer invalidtoken")
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
+}
+
+func TestJwtMiddleware_Error(t *testing.T) {
+	router := gin.Default()
+
+	mockService := new(mocks.MockedApplicationService)
+	router.Use(middleware.JwtMiddleware(mockService))
+
+	dummyToken := &jwt.Token{
+		Raw:       "DummyToken",
+		Method:    jwt.SigningMethodHS256,
+		Header:    map[string]interface{}{"alg": "HS256"},
+		Claims:    jwt.MapClaims{"foo": "bar"},
+		Signature: "",
+		Valid:     false,
+	}
+
+	mockService.On("ValidateToken", "dummy").Return(dummyToken, errors.New("mock error"))
+
+	req, _ := http.NewRequest("GET", "/", nil)
+	req.Header.Set("Authorization", "Bearer dummy")
+	resp := httptest.NewRecorder()
+	router.ServeHTTP(resp, req)
+
+	if status := resp.Code; status != utils.ErrorStatusCodes[utils.ErrUnauthorized] {
+		t.Errorf("Handler returned wrong status code: got %v want %v", status, utils.ErrorStatusCodes[utils.ErrUnauthorized])
+	}
+}