import { afterEach, describe, expect, it } from "vite-plus/test"; import { getTerminalFocusOwner, isTerminalFocused } from "./terminalFocus"; class MockHTMLElement {  isConnected = false;  className = "";  terminalOwner: string | null = null;  readonly dataset: { terminalOwner?: string } = {};   readonly classList = {    contains: (value: string) => this.className.split(/\s+/).includes(value),  };   closest(selector: string): MockHTMLElement | null {    if (!this.isConnected) {      return null;    }    if (selector === "[data-terminal-owner]" && this.terminalOwner !== null) {      return this;    }    return null;  }} const originalDocument = globalThis.document;const originalHTMLElement = globalThis.HTMLElement; afterEach(() => {  if (originalDocument === undefined) {    delete (globalThis as { document?: Document }).document;  } else {    globalThis.document = originalDocument;  }   if (originalHTMLElement === undefined) {    delete (globalThis as { HTMLElement?: typeof HTMLElement }).HTMLElement;  } else {    globalThis.HTMLElement = originalHTMLElement;  }}); describe("isTerminalFocused", () => {  it("returns false for detached xterm helper textareas", () => {    const detached = new MockHTMLElement();    detached.className = "xterm-helper-textarea";     globalThis.HTMLElement = MockHTMLElement as unknown as typeof HTMLElement;    globalThis.document = { activeElement: detached } as unknown as Document;     expect(isTerminalFocused()).toBe(false);  });   it("returns the drawer owner for connected xterm helper textareas", () => {    const attached = new MockHTMLElement();    attached.className = "xterm-helper-textarea";    attached.isConnected = true;    attached.terminalOwner = "drawer";    attached.dataset.terminalOwner = "drawer";     globalThis.HTMLElement = MockHTMLElement as unknown as typeof HTMLElement;    globalThis.document = { activeElement: attached } as unknown as Document;     expect(getTerminalFocusOwner()).toBe("drawer");    expect(isTerminalFocused()).toBe(true);  });   it("returns the right panel owner for focus inside its terminal UI", () => {    const sidebarButton = new MockHTMLElement();    sidebarButton.className = "terminal-sidebar-button";    sidebarButton.isConnected = true;    sidebarButton.terminalOwner = "right-panel";    sidebarButton.dataset.terminalOwner = "right-panel";     globalThis.HTMLElement = MockHTMLElement as unknown as typeof HTMLElement;    globalThis.document = { activeElement: sidebarButton } as unknown as Document;     expect(getTerminalFocusOwner()).toBe("right-panel");    expect(isTerminalFocused()).toBe(true);  });});