diff --git a/src/test/java/com/DesktopApplicationClientJava/ui/ResourceFormControllerTest.java b/src/test/java/com/DesktopApplicationClientJava/ui/ResourceFormControllerTest.java
new file mode 100644
index 0000000..465aded
--- /dev/null
+++ b/src/test/java/com/DesktopApplicationClientJava/ui/ResourceFormControllerTest.java
@@ -0,0 +1,222 @@
+package com.DesktopApplicationClientJava.ui;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.DesktopApplicationClientJava.controllers.ResourceFormController;
+import com.DesktopApplicationClientJava.entities.Resource;
+import com.DesktopApplicationClientJava.navigation.Navigator;
+import com.DesktopApplicationClientJava.services.ResourceService;
+import com.DesktopApplicationClientJava.services.ServiceException;
+import com.DesktopApplicationClientJava.services.ServiceRegistry;
+import com.DesktopApplicationClientJava.session.Session;
+import com.DesktopApplicationClientJava.utils.ControllerWiring;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.UUID;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextArea;
+import javafx.scene.control.TextField;
+import javafx.stage.Stage;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.testfx.api.FxRobot;
+import org.testfx.framework.junit5.ApplicationExtension;
+import org.testfx.framework.junit5.Start;
+
+@ExtendWith(ApplicationExtension.class)
+class ResourceFormControllerTest {
+
+  private static final UUID RESOURCE_ID = UUID.randomUUID();
+  private static final String TITLE = "Годовой отчёт";
+  private static final String DESCRIPTION = "Описание документа";
+
+  private ResourceService resourceService;
+  private ServiceRegistry services;
+  private Navigator navigator;
+  private ResourceFormController controller;
+  private Stage stage;
+
+  @Start
+  void start(Stage stage) throws Exception {
+    resourceService = mock(ResourceService.class);
+    services = mock(ServiceRegistry.class);
+    when(services.getResourceService()).thenReturn(resourceService);
+    navigator = mock(Navigator.class);
+    this.stage = stage;
+    loadForm(null);
+  }
+
+  /** Loads the form as {@code initialize()} would see it (resourceId set before FXML load). */
+  private void loadForm(UUID resourceId) throws Exception {
+    controller = new ResourceFormController();
+    controller.setResourceId(resourceId);
+    FXMLLoader loader = new FXMLLoader(getClass().getResource("/fxml/ResourceForm.fxml"));
+    loader.setControllerFactory(
+        clazz -> {
+          ControllerWiring.wire(controller, navigator, new Session(), services);
+          return controller;
+        });
+    Parent root = loader.load();
+    stage.setScene(new Scene(root));
+    stage.show();
+  }
+
+  /**
+   * Production ordering (see Navigator.goTo): the form is loaded with no id, and the id is set
+   * afterwards via withController. Setting it here post-load must drive the controller into edit
+   * mode; pre-setting it before load would mask a controller that ignores late ids.
+   */
+  private void openEditForm(FxRobot robot, UUID resourceId) {
+    robot.interact(() -> controller.setResourceId(resourceId));
+  }
+
+  @Test
+  void createModeShowsNewDocumentTitle(FxRobot robot) {
+    assertEquals("Новый документ", textOf(robot, "#formTitleLabel"));
+    assertFalse(robot.lookup("#errorLabel").queryAs(Label.class).isVisible());
+  }
+
+  @Test
+  void blankTitleShowsErrorAndDoesNotSave(FxRobot robot) {
+    robot.clickOn("#saveButton");
+
+    assertError(robot, "Название обязательно для заполнения");
+    verify(resourceService, never()).create(anyString(), any());
+    verify(resourceService, never()).update(any(), anyString(), any());
+    verify(navigator, never()).goTo(anyString());
+  }
+
+  @Test
+  void shortTitleShowsErrorAndDoesNotSave(FxRobot robot) {
+    robot.clickOn("#titleField").write("ab");
+    robot.clickOn("#saveButton");
+
+    assertError(robot, "Название не может быть короче 3 символов");
+    verify(resourceService, never()).create(anyString(), any());
+    verify(navigator, never()).goTo(anyString());
+  }
+
+  @Test
+  void longTitleShowsErrorAndDoesNotSave(FxRobot robot) {
+    robot.clickOn("#titleField").write("a".repeat(256));
+    robot.clickOn("#saveButton");
+
+    assertError(robot, "Название не может быть длиннее 255 символов");
+    verify(resourceService, never()).create(anyString(), any());
+    verify(resourceService, never()).update(any(), anyString(), any());
+    verify(navigator, never()).goTo(anyString());
+  }
+
+  @Test
+  void validInputCreatesAndNavigatesToList(FxRobot robot) {
+    robot.clickOn("#titleField").write(TITLE);
+    robot.clickOn("#descriptionArea").write(DESCRIPTION);
+    robot.clickOn("#saveButton");
+
+    verify(resourceService).create(TITLE, DESCRIPTION);
+    verify(navigator).goTo("/fxml/ResourceList.fxml");
+    assertFalse(robot.lookup("#errorLabel").queryAs(Label.class).isVisible());
+  }
+
+  @Test
+  void blankDescriptionIsSavedAsNull(FxRobot robot) {
+    robot.clickOn("#titleField").write(TITLE);
+    robot.clickOn("#saveButton");
+
+    verify(resourceService).create(TITLE, null);
+    verify(navigator).goTo("/fxml/ResourceList.fxml");
+  }
+
+  @Test
+  void serviceErrorShowsInErrorLabelAndDoesNotNavigate(FxRobot robot) {
+    when(resourceService.create(anyString(), any()))
+        .thenThrow(new ServiceException("Не удалось сохранить"));
+
+    robot.clickOn("#titleField").write(TITLE);
+    robot.clickOn("#saveButton");
+
+    assertError(robot, "Не удалось сохранить");
+    verify(navigator, never()).goTo(anyString());
+  }
+
+  @Test
+  void cancelNavigatesToListWithoutSaving(FxRobot robot) {
+    robot.clickOn("#titleField").write(TITLE);
+    robot.clickOn("#cancelButton");
+
+    verify(navigator).goTo("/fxml/ResourceList.fxml");
+    verify(resourceService, never()).create(anyString(), any());
+    verify(resourceService, never()).update(any(), anyString(), any());
+  }
+
+  @Test
+  void editModePrefillsExistingValues(FxRobot robot) {
+    when(resourceService.getById(RESOURCE_ID)).thenReturn(existingResource());
+    openEditForm(robot, RESOURCE_ID);
+
+    assertEquals("Редактирование документа", textOf(robot, "#formTitleLabel"));
+    assertEquals("Старое название", fieldText(robot, "#titleField"));
+    assertEquals("Старое описание", areaText(robot, "#descriptionArea"));
+  }
+
+  @Test
+  void editModeSaveUpdatesAndNavigatesToList(FxRobot robot) {
+    when(resourceService.getById(RESOURCE_ID)).thenReturn(existingResource());
+    openEditForm(robot, RESOURCE_ID);
+
+    robot.interact(
+        () -> robot.lookup("#titleField").queryAs(TextField.class).setText("Новое название"));
+    robot.clickOn("#saveButton");
+
+    verify(resourceService).update(RESOURCE_ID, "Новое название", "Старое описание");
+    verify(resourceService, never()).create(anyString(), any());
+    verify(navigator).goTo("/fxml/ResourceList.fxml");
+  }
+
+  @Test
+  void editModeLoadErrorShowsInErrorLabel(FxRobot robot) {
+    when(resourceService.getById(RESOURCE_ID)).thenThrow(new ServiceException("Ресурс не найден"));
+    openEditForm(robot, RESOURCE_ID);
+
+    assertError(robot, "Ресурс не найден");
+  }
+
+  private Resource existingResource() {
+    return new Resource(
+        RESOURCE_ID,
+        "Старое название",
+        "Старое описание",
+        LocalDateTime.of(2024, 5, 6, 7, 8),
+        LocalDateTime.of(2024, 5, 7, 9, 10),
+        List.of());
+  }
+
+  private static void assertError(FxRobot robot, String expected) {
+    Label error = robot.lookup("#errorLabel").queryAs(Label.class);
+    assertTrue(error.isVisible());
+    assertEquals(expected, error.getText());
+  }
+
+  private static String textOf(FxRobot robot, String query) {
+    return robot.lookup(query).queryAs(Label.class).getText();
+  }
+
+  private static String fieldText(FxRobot robot, String query) {
+    return robot.lookup(query).queryAs(TextField.class).getText();
+  }
+
+  private static String areaText(FxRobot robot, String query) {
+    return robot.lookup(query).queryAs(TextArea.class).getText();
+  }
+}