lint 실패 해결

backend/internal/handler/auth_handler_login_test.go

@@ -299,3 +299,44 @@ func TestPasswordLogin_NoOIDC_Success(t *testing.T) {
 		t.Errorf("expected no redirectTo, got %s", got["redirectTo"])
 	}
 }
+
+func TestPasswordLogin_InvalidCredentials_ReturnsCode(t *testing.T) {
+	mockIdp := new(MockIdentityProvider)
+	mockIdp.On("SignIn", "user@example.com", "wrong-password").Return(nil, errors.New("비밀번호가 일치하지 않습니다"))
+
+	h := &AuthHandler{
+		IdpProvider: mockIdp,
+		KratosAdmin: service.NewKratosAdminService(),
+		Hydra:       service.NewHydraAdminService(),
+	}
+
+	app := newAuthLoginTestApp(h)
+
+	body, _ := json.Marshal(map[string]string{
+		"loginId":  "user@example.com",
+		"password": "wrong-password",
+	})
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/login", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := app.Test(req)
+	if err != nil {
+		t.Fatalf("request failed: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusUnauthorized {
+		t.Fatalf("expected 401, got %d", resp.StatusCode)
+	}
+
+	var got map[string]any
+	if err := json.NewDecoder(resp.Body).Decode(&got); err != nil {
+		t.Fatalf("failed to decode response: %v", err)
+	}
+	if got["code"] != "password_or_email_mismatch" {
+		t.Fatalf("expected code=password_or_email_mismatch, got=%v", got["code"])
+	}
+	if got["error"] != "Invalid credentials" {
+		t.Fatalf("expected error=Invalid credentials, got=%v", got["error"])
+	}
+}