feat: Add "Duplicate Tab" support for Items, Query, and Settings tabs

src/Explorer/Tabs/DocumentsTabV2/DocumentsTabV2.duplicateTab.test.tsx

@@ -0,0 +1,85 @@
+import { useTabs } from "hooks/useTabs";
+import * as ko from "knockout";
+import * as ViewModels from "../../../Contracts/ViewModels";
+import { DocumentsTabV2 } from "./DocumentsTabV2";
+
+jest.mock("hooks/useTabs", () => ({
+  useTabs: {
+    getState: jest.fn(),
+  },
+}));
+
+jest.mock("UserContext", () => ({
+  userContext: { apiType: "SQL" },
+}));
+
+jest.mock("Explorer/Menus/CommandBar/CommandBarComponentAdapter", () => ({
+  useCommandBar: { getState: jest.fn(() => ({ setContextButtons: jest.fn() })) },
+}));
+
+jest.mock("Explorer/Controls/Editor/EditorReact", () => ({
+  EditorReact: () => null,
+}));
+
+const mockCollection = {
+  id: ko.observable<string>("testContainer"),
+  databaseId: "testDb",
+  partitionKey: { paths: ["/pk"], kind: "Hash", version: 2 },
+  selectedSubnodeKind: jest.fn(),
+  container: {},
+} as unknown as ViewModels.Collection;
+
+const buildTab = () =>
+  new DocumentsTabV2({
+    partitionKey: mockCollection.partitionKey,
+    documentIds: ko.observableArray([]),
+    tabKind: ViewModels.CollectionTabKind.Documents,
+    title: "Items",
+    collection: mockCollection,
+    node: mockCollection,
+    tabPath: "testDb>testContainer>Documents",
+  });
+
+describe("DocumentsTabV2.duplicateTab", () => {
+  let activateNewTab: jest.Mock;
+
+  beforeEach(() => {
+    activateNewTab = jest.fn();
+    (useTabs.getState as jest.Mock).mockReturnValue({ activateNewTab });
+  });
+
+  afterEach(() => jest.clearAllMocks());
+
+  it("calls activateNewTab with a new DocumentsTabV2 instance", () => {
+    const tab = buildTab();
+    tab.duplicateTab();
+
+    expect(activateNewTab).toHaveBeenCalledTimes(1);
+    const newTab = activateNewTab.mock.calls[0][0];
+    expect(newTab).toBeInstanceOf(DocumentsTabV2);
+  });
+
+  it("creates a duplicate with the same collection", () => {
+    const tab = buildTab();
+    tab.duplicateTab();
+
+    const newTab = activateNewTab.mock.calls[0][0] as DocumentsTabV2;
+    expect(newTab.collection).toBe(mockCollection);
+  });
+
+  it("creates a duplicate with the same partitionKey", () => {
+    const tab = buildTab();
+    tab.duplicateTab();
+
+    const newTab = activateNewTab.mock.calls[0][0] as DocumentsTabV2;
+    expect(newTab.partitionKey).toEqual(mockCollection.partitionKey);
+  });
+
+  it("creates a distinct tab instance", () => {
+    const tab = buildTab();
+    tab.duplicateTab();
+
+    const newTab = activateNewTab.mock.calls[0][0];
+    expect(newTab).not.toBe(tab);
+  });
+});