import { afterEach, describe, expect, it } from "vitest"; import { isTerminalFocused } from "./terminalFocus"; class MockHTMLElement {  isConnected = false;  className = "";   readonly classList = {    contains: (value: string) => this.className.split(/\s+/).includes(value),  };   closest(selector: string): MockHTMLElement | null {    if (!this.isConnected) {      return null;    }    if (selector === ".thread-terminal-drawer .xterm" || selector === ".thread-terminal-drawer") {      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 Document;     expect(isTerminalFocused()).toBe(false);  });   it("returns true for connected xterm helper textareas", () => {    const attached = new MockHTMLElement();    attached.className = "xterm-helper-textarea";    attached.isConnected = true;     globalThis.HTMLElement = MockHTMLElement as unknown as typeof HTMLElement;    globalThis.document = { activeElement: attached } as Document;     expect(isTerminalFocused()).toBe(true);  });   it("returns true for focus inside the terminal drawer (e.g. sidebar)", () => {    const sidebarButton = new MockHTMLElement();    sidebarButton.className = "terminal-sidebar-button";    sidebarButton.isConnected = true;     globalThis.HTMLElement = MockHTMLElement as unknown as typeof HTMLElement;    globalThis.document = { activeElement: sidebarButton } as Document;     expect(isTerminalFocused()).toBe(true);  });});