test: add comprehensive unit tests for disableDnd functionality

- Add unit tests for Tab draggable attribute with disableDnd option
- Add unit tests for VoidContainer draggable attribute with disableDnd option
- Add unit tests for updateDragAndDropState methods in all components
- Add integration tests for updateOptions with disableDnd changes
- Fix existing test mocks to include required options property

Tests cover both initial state and dynamic updates when option changes.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/dockview-core/src/__tests__/dockview/components/tab.spec.ts

@@ -12,12 +12,14 @@ import { fromPartial } from '@total-typescript/shoehorn';
 
 describe('tab', () => {
     test('that empty tab has inactive-tab class', () => {
-        const accessorMock = jest.fn();
+        const accessor = fromPartial<DockviewComponent>({
+            options: {}
+        });
         const groupMock = jest.fn();
 
         const cut = new Tab(
             { id: 'panelId' } as IDockviewPanel,
-            new accessorMock(),
+            accessor,
             new groupMock()
         );
 
@@ -25,12 +27,14 @@ describe('tab', () => {
     });
 
     test('that active tab has active-tab class', () => {
-        const accessorMock = jest.fn();
+        const accessor = fromPartial<DockviewComponent>({
+            options: {}
+        });
         const groupMock = jest.fn();
 
         const cut = new Tab(
             { id: 'panelId' } as IDockviewPanel,
-            new accessorMock(),
+            accessor,
             new groupMock()
         );
 
@@ -42,26 +46,20 @@ describe('tab', () => {
     });
 
     test('that an external event does not render a drop target and calls through to the group model', () => {
-        const accessorMock = jest.fn<Partial<DockviewComponent>, []>(() => {
-            return {
-                id: 'testcomponentid',
-            };
+        const accessor = fromPartial<DockviewComponent>({
+            id: 'testcomponentid',
+            options: {}
         });
 
         const groupView = fromPartial<DockviewGroupPanelModel>({
             canDisplayOverlay: jest.fn(),
         });
 
-        const groupPanelMock = jest.fn<Partial<DockviewGroupPanel>, []>(() => {
-            return {
-                id: 'testgroupid',
-                model: groupView,
-            };
+        const groupPanel = fromPartial<DockviewGroupPanel>({
+            id: 'testgroupid',
+            model: groupView,
         });
 
-        const accessor = new accessorMock() as DockviewComponent;
-        const groupPanel = new groupPanelMock() as DockviewGroupPanel;
-
         const cut = new Tab(
             { id: 'panelId' } as IDockviewPanel,
             accessor,
@@ -86,26 +84,20 @@ describe('tab', () => {
     });
 
     test('that if you drag over yourself a drop target is shown', () => {
-        const accessorMock = jest.fn<Partial<DockviewComponent>, []>(() => {
-            return {
-                id: 'testcomponentid',
-            };
+        const accessor = fromPartial<DockviewComponent>({
+            id: 'testcomponentid',
+            options: {}
         });
 
         const groupView = fromPartial<DockviewGroupPanelModel>({
             canDisplayOverlay: jest.fn(),
         });
 
-        const groupPanelMock = jest.fn<Partial<DockviewGroupPanel>, []>(() => {
-            return {
-                id: 'testgroupid',
-                model: groupView,
-            };
+        const groupPanel = fromPartial<DockviewGroupPanel>({
+            id: 'testgroupid',
+            model: groupView,
         });
 
-        const accessor = new accessorMock() as DockviewComponent;
-        const groupPanel = new groupPanelMock() as DockviewGroupPanel;
-
         const cut = new Tab(
             { id: 'panel1' } as IDockviewPanel,
             accessor,
@@ -135,30 +127,19 @@ describe('tab', () => {
     });
 
     test('that if you drag over another tab a drop target is shown', () => {
-        const accessorMock = jest.fn<Partial<DockviewComponent>, []>(() => {
-            return {
-                id: 'testcomponentid',
-            };
-        });
-        const groupviewMock = jest.fn<Partial<DockviewGroupPanelModel>, []>(
-            () => {
-                return {
-                    canDisplayOverlay: jest.fn(),
-                };
-            }
-        );
-
-        const groupView = new groupviewMock() as DockviewGroupPanelModel;
-
-        const groupPanelMock = jest.fn<Partial<DockviewGroupPanel>, []>(() => {
-            return {
-                id: 'testgroupid',
-                model: groupView,
-            };
+        const accessor = fromPartial<DockviewComponent>({
+            id: 'testcomponentid',
+            options: {}
         });
 
-        const accessor = new accessorMock() as DockviewComponent;
-        const groupPanel = new groupPanelMock() as DockviewGroupPanel;
+        const groupView = fromPartial<DockviewGroupPanelModel>({
+            canDisplayOverlay: jest.fn(),
+        });
+
+        const groupPanel = fromPartial<DockviewGroupPanel>({
+            id: 'testgroupid',
+            model: groupView,
+        });
 
         const cut = new Tab(
             { id: 'panel1' } as IDockviewPanel,
@@ -189,30 +170,19 @@ describe('tab', () => {
     });
 
     test('that dropping on a tab with the same id but from a different component should not render a drop over and call through to the group model', () => {
-        const accessorMock = jest.fn<Partial<DockviewComponent>, []>(() => {
-            return {
-                id: 'testcomponentid',
-            };
-        });
-        const groupviewMock = jest.fn<Partial<DockviewGroupPanelModel>, []>(
-            () => {
-                return {
-                    canDisplayOverlay: jest.fn(),
-                };
-            }
-        );
-
-        const groupView = new groupviewMock() as DockviewGroupPanelModel;
-
-        const groupPanelMock = jest.fn<Partial<DockviewGroupPanel>, []>(() => {
-            return {
-                id: 'testgroupid',
-                model: groupView,
-            };
+        const accessor = fromPartial<DockviewComponent>({
+            id: 'testcomponentid',
+            options: {}
         });
 
-        const accessor = new accessorMock() as DockviewComponent;
-        const groupPanel = new groupPanelMock() as DockviewGroupPanel;
+        const groupView = fromPartial<DockviewGroupPanelModel>({
+            canDisplayOverlay: jest.fn(),
+        });
+
+        const groupPanel = fromPartial<DockviewGroupPanel>({
+            id: 'testgroupid',
+            model: groupView,
+        });
 
         const cut = new Tab(
             { id: 'panel1' } as IDockviewPanel,
@@ -249,30 +219,19 @@ describe('tab', () => {
     });
 
     test('that dropping on a tab from a different component should not render a drop over and call through to the group model', () => {
-        const accessorMock = jest.fn<Partial<DockviewComponent>, []>(() => {
-            return {
-                id: 'testcomponentid',
-            };
-        });
-        const groupviewMock = jest.fn<Partial<DockviewGroupPanelModel>, []>(
-            () => {
-                return {
-                    canDisplayOverlay: jest.fn(),
-                };
-            }
-        );
-
-        const groupView = new groupviewMock() as DockviewGroupPanelModel;
-
-        const groupPanelMock = jest.fn<Partial<DockviewGroupPanel>, []>(() => {
-            return {
-                id: 'testgroupid',
-                model: groupView,
-            };
+        const accessor = fromPartial<DockviewComponent>({
+            id: 'testcomponentid',
+            options: {}
         });
 
-        const accessor = new accessorMock() as DockviewComponent;
-        const groupPanel = new groupPanelMock() as DockviewGroupPanel;
+        const groupView = fromPartial<DockviewGroupPanelModel>({
+            canDisplayOverlay: jest.fn(),
+        });
+
+        const groupPanel = fromPartial<DockviewGroupPanel>({
+            id: 'testgroupid',
+            model: groupView,
+        });
 
         const cut = new Tab(
             { id: 'panel1' } as IDockviewPanel,
@@ -307,4 +266,77 @@ describe('tab', () => {
             cut.element.getElementsByClassName('dv-drop-target-dropzone').length
         ).toBe(0);
     });
+
+    describe('disableDnd option', () => {
+        test('that tab is draggable by default (disableDnd not set)', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                options: {}
+            });
+            const groupMock = jest.fn();
+
+            const cut = new Tab(
+                { id: 'panelId' } as IDockviewPanel,
+                accessor,
+                new groupMock()
+            );
+
+            expect(cut.element.draggable).toBe(true);
+        });
+
+        test('that tab is draggable when disableDnd is false', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                options: { disableDnd: false }
+            });
+            const groupMock = jest.fn();
+
+            const cut = new Tab(
+                { id: 'panelId' } as IDockviewPanel,
+                accessor,
+                new groupMock()
+            );
+
+            expect(cut.element.draggable).toBe(true);
+        });
+
+        test('that tab is not draggable when disableDnd is true', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                options: { disableDnd: true }
+            });
+            const groupMock = jest.fn();
+
+            const cut = new Tab(
+                { id: 'panelId' } as IDockviewPanel,
+                accessor,
+                new groupMock()
+            );
+
+            expect(cut.element.draggable).toBe(false);
+        });
+
+        test('that updateDragAndDropState updates draggable attribute based on disableDnd option', () => {
+            const options = { disableDnd: false };
+            const accessor = fromPartial<DockviewComponent>({
+                options
+            });
+            const groupMock = jest.fn();
+
+            const cut = new Tab(
+                { id: 'panelId' } as IDockviewPanel,
+                accessor,
+                new groupMock()
+            );
+
+            expect(cut.element.draggable).toBe(true);
+
+            // Simulate option change
+            options.disableDnd = true;
+            cut.updateDragAndDropState();
+            expect(cut.element.draggable).toBe(false);
+
+            // Change back
+            options.disableDnd = false;
+            cut.updateDragAndDropState();
+            expect(cut.element.draggable).toBe(true);
+        });
+    });
 });

packages/dockview-core/src/__tests__/dockview/components/titlebar/tabs.spec.ts

@@ -63,4 +63,33 @@ describe('tabs', () => {
             ).toBe(0);
         });
     });
+
+    describe('updateDragAndDropState', () => {
+        test('that updateDragAndDropState calls updateDragAndDropState on all tabs', () => {
+            const cut = new Tabs(
+                fromPartial<DockviewGroupPanel>({}),
+                fromPartial<DockviewComponent>({
+                    options: {},
+                }),
+                {
+                    showTabsOverflowControl: true,
+                }
+            );
+
+            // Mock tab to verify the method is called
+            const mockTab1 = { updateDragAndDropState: jest.fn() };
+            const mockTab2 = { updateDragAndDropState: jest.fn() };
+
+            // Add mock tabs to the internal tabs array
+            (cut as any)._tabs = [
+                { value: mockTab1 },
+                { value: mockTab2 }
+            ];
+
+            cut.updateDragAndDropState();
+
+            expect(mockTab1.updateDragAndDropState).toHaveBeenCalledTimes(1);
+            expect(mockTab2.updateDragAndDropState).toHaveBeenCalledTimes(1);
+        });
+    });
 });

packages/dockview-core/src/__tests__/dockview/components/titlebar/tabsContainer.spec.ts

@@ -864,4 +864,34 @@ describe('tabsContainer', () => {
         cut.closePanel(panel2);
         expect(cut.element.classList.contains('dv-single-tab')).toBeFalsy();
     });
+
+    describe('updateDragAndDropState', () => {
+        test('that updateDragAndDropState calls updateDragAndDropState on tabs and voidContainer', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                onDidAddPanel: jest.fn(),
+                onDidRemovePanel: jest.fn(),
+                options: {},
+                onDidOptionsChange: jest.fn(),
+            });
+
+            const groupPanel = fromPartial<DockviewGroupPanel>({
+                id: 'testgroupid',
+                model: fromPartial<DockviewGroupPanelModel>({}),
+            });
+
+            const cut = new TabsContainer(accessor, groupPanel);
+
+            // Mock the tabs and voidContainer to verify methods are called
+            const mockTabs = { updateDragAndDropState: jest.fn() };
+            const mockVoidContainer = { updateDragAndDropState: jest.fn() };
+
+            (cut as any).tabs = mockTabs;
+            (cut as any).voidContainer = mockVoidContainer;
+
+            cut.updateDragAndDropState();
+
+            expect(mockTabs.updateDragAndDropState).toHaveBeenCalledTimes(1);
+            expect(mockVoidContainer.updateDragAndDropState).toHaveBeenCalledTimes(1);
+        });
+    });
 });

packages/dockview-core/src/__tests__/dockview/components/titlebar/voidContainer.spec.ts

@@ -8,6 +8,7 @@ describe('voidContainer', () => {
     test('that `pointerDown` triggers activation', () => {
         const accessor = fromPartial<DockviewComponent>({
             doSetGroupActive: jest.fn(),
+            options: {}
         });
         const group = fromPartial<DockviewGroupPanel>({});
         const cut = new VoidContainer(accessor, group);
@@ -17,4 +18,57 @@ describe('voidContainer', () => {
         fireEvent.pointerDown(cut.element);
         expect(accessor.doSetGroupActive).toHaveBeenCalledWith(group);
     });
+
+    describe('disableDnd option', () => {
+        test('that void container is draggable by default (disableDnd not set)', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                options: {}
+            });
+            const group = fromPartial<DockviewGroupPanel>({});
+            const cut = new VoidContainer(accessor, group);
+
+            expect(cut.element.draggable).toBe(true);
+        });
+
+        test('that void container is draggable when disableDnd is false', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                options: { disableDnd: false }
+            });
+            const group = fromPartial<DockviewGroupPanel>({});
+            const cut = new VoidContainer(accessor, group);
+
+            expect(cut.element.draggable).toBe(true);
+        });
+
+        test('that void container is not draggable when disableDnd is true', () => {
+            const accessor = fromPartial<DockviewComponent>({
+                options: { disableDnd: true }
+            });
+            const group = fromPartial<DockviewGroupPanel>({});
+            const cut = new VoidContainer(accessor, group);
+
+            expect(cut.element.draggable).toBe(false);
+        });
+
+        test('that updateDragAndDropState updates draggable attribute based on disableDnd option', () => {
+            const options = { disableDnd: false };
+            const accessor = fromPartial<DockviewComponent>({
+                options
+            });
+            const group = fromPartial<DockviewGroupPanel>({});
+            const cut = new VoidContainer(accessor, group);
+
+            expect(cut.element.draggable).toBe(true);
+
+            // Simulate option change
+            options.disableDnd = true;
+            cut.updateDragAndDropState();
+            expect(cut.element.draggable).toBe(false);
+
+            // Change back
+            options.disableDnd = false;
+            cut.updateDragAndDropState();
+            expect(cut.element.draggable).toBe(true);
+        });
+    });
 });

packages/dockview-core/src/__tests__/dockview/dockviewComponent.spec.ts

@@ -144,6 +144,102 @@ describe('dockviewComponent', () => {
         );
     });
 
+    describe('disableDnd option integration', () => {
+        test('that updateOptions with disableDnd updates all tabs and void containers', () => {
+            dockview = new DockviewComponent(container, {
+                createComponent(options) {
+                    switch (options.name) {
+                        case 'default':
+                            return new PanelContentPartTest(
+                                options.id,
+                                options.name
+                            );
+                        default:
+                            throw new Error(`unsupported`);
+                    }
+                },
+                disableDnd: false,
+            });
+
+            // Add some panels to create tabs
+            const panel1 = dockview.addPanel({
+                id: 'panel1',
+                component: 'default',
+            });
+            const panel2 = dockview.addPanel({
+                id: 'panel2',
+                component: 'default',
+            });
+
+            // Get all tab elements and void containers
+            const tabElements = Array.from(dockview.element.querySelectorAll('.dv-tab')) as HTMLElement[];
+            const voidContainers = Array.from(dockview.element.querySelectorAll('.dv-void-container')) as HTMLElement[];
+
+            // Initially tabs should be draggable (disableDnd: false)
+            tabElements.forEach(tab => {
+                expect(tab.draggable).toBe(true);
+            });
+            voidContainers.forEach(container => {
+                expect(container.draggable).toBe(true);
+            });
+
+            // Update options to disable DnD
+            dockview.updateOptions({ disableDnd: true });
+
+            // Now tabs should not be draggable
+            tabElements.forEach(tab => {
+                expect(tab.draggable).toBe(false);
+            });
+            voidContainers.forEach(container => {
+                expect(container.draggable).toBe(false);
+            });
+
+            // Update options to enable DnD again
+            dockview.updateOptions({ disableDnd: false });
+
+            // Tabs should be draggable again
+            tabElements.forEach(tab => {
+                expect(tab.draggable).toBe(true);
+            });
+            voidContainers.forEach(container => {
+                expect(container.draggable).toBe(true);
+            });
+        });
+
+        test('that new tabs respect current disableDnd option when added after option change', () => {
+            dockview = new DockviewComponent(container, {
+                createComponent(options) {
+                    switch (options.name) {
+                        case 'default':
+                            return new PanelContentPartTest(
+                                options.id,
+                                options.name
+                            );
+                        default:
+                            throw new Error(`unsupported`);
+                    }
+                },
+                disableDnd: false,
+            });
+
+            // Set disableDnd to true
+            dockview.updateOptions({ disableDnd: true });
+
+            // Add a panel after the option change
+            const panel = dockview.addPanel({
+                id: 'panel1',
+                component: 'default',
+            });
+
+            // New tab should not be draggable
+            const tabElement = dockview.element.querySelector('.dv-tab') as HTMLElement;
+            const voidContainer = dockview.element.querySelector('.dv-void-container') as HTMLElement;
+
+            expect(tabElement.draggable).toBe(false);
+            expect(voidContainer.draggable).toBe(false);
+        });
+    });
+
     describe('memory leakage', () => {
         beforeEach(() => {
             window.open = () => setupMockWindow();