1 files changed, 74 insertions, 0 deletions
diff --git a/internal/api/auth/auth_test.go b/internal/api/auth/auth_test.go
new file mode 100644
index 0000000..50b6c9b
--- /dev/null
+++ b/internal/api/auth/auth_test.go
@@ -0,0 +1,74 @@
+package auth
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGenerateAndValidateJWT(t *testing.T) {
+	// Set up the JWT secret for the test.
+	os.Setenv("JWT_SECRET", "testsecret")
+	jwtKey = []byte(os.Getenv("JWT_SECRET"))
+
+	userID := 123
+	tokenString, err := GenerateJWT(userID)
+	assert.NoError(t, err)
+	assert.NotEmpty(t, tokenString)
+
+	claims, err := ValidateJWT(tokenString)
+	assert.NoError(t, err)
+	assert.NotNil(t, claims)
+	assert.Equal(t, userID, claims.UserID)
+	assert.True(t, claims.ExpiresAt.After(time.Now()))
+}
+
+func TestValidateJWT_InvalidToken(t *testing.T) {
+	os.Setenv("JWT_SECRET", "testsecret")
+	jwtKey = []byte(os.Getenv("JWT_SECRET"))
+
+	_, err := ValidateJWT("invalid_token")
+	assert.Error(t, err)
+}
+
+func TestValidateJWT_ExpiredToken(t *testing.T) {
+	os.Setenv("JWT_SECRET", "testsecret")
+	jwtKey = []byte(os.Getenv("JWT_SECRET"))
+
+	// Create a token that has already expired.
+	claims := &Claims{
+		UserID: 123,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(-1 * time.Hour)),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	tokenString, err := token.SignedString(jwtKey)
+	assert.NoError(t, err)
+
+	_, err = ValidateJWT(tokenString)
+	assert.Error(t, err)
+}
+
+func TestValidateJWT_WrongSecret(t *testing.T) {
+	os.Setenv("JWT_SECRET", "testsecret")
+	jwtKey = []byte(os.Getenv("JWT_SECRET"))
+
+	userID := 123
+	tokenString, err := GenerateJWT(userID)
+	assert.NoError(t, err)
+
+	// Set a different secret for validation.
+	wrongKey := []byte("wrongsecret")
+
+	claims := &Claims{}
+	_, err = jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
+		return wrongKey, nil
+	})
+
+	assert.Error(t, err)
+}