Add terminal setup command for Shift+Enter and Ctrl+Enter support (#3289)

Co-authored-by: jacob314 <jacob314@gmail.com>

packages/cli/src/ui/commands/terminalSetupCommand.test.ts

@@ -0,0 +1,85 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { terminalSetupCommand } from './terminalSetupCommand.js';
+import * as terminalSetupModule from '../utils/terminalSetup.js';
+import { CommandContext } from './types.js';
+
+vi.mock('../utils/terminalSetup.js');
+
+describe('terminalSetupCommand', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('should have correct metadata', () => {
+    expect(terminalSetupCommand.name).toBe('terminal-setup');
+    expect(terminalSetupCommand.description).toContain('multiline input');
+    expect(terminalSetupCommand.kind).toBe('built-in');
+  });
+
+  it('should return success message when terminal setup succeeds', async () => {
+    vi.spyOn(terminalSetupModule, 'terminalSetup').mockResolvedValue({
+      success: true,
+      message: 'Terminal configured successfully',
+    });
+
+    const result = await terminalSetupCommand.action({} as CommandContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      content: 'Terminal configured successfully',
+      messageType: 'info',
+    });
+  });
+
+  it('should append restart message when terminal setup requires restart', async () => {
+    vi.spyOn(terminalSetupModule, 'terminalSetup').mockResolvedValue({
+      success: true,
+      message: 'Terminal configured successfully',
+      requiresRestart: true,
+    });
+
+    const result = await terminalSetupCommand.action({} as CommandContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      content:
+        'Terminal configured successfully\n\nPlease restart your terminal for the changes to take effect.',
+      messageType: 'info',
+    });
+  });
+
+  it('should return error message when terminal setup fails', async () => {
+    vi.spyOn(terminalSetupModule, 'terminalSetup').mockResolvedValue({
+      success: false,
+      message: 'Failed to detect terminal',
+    });
+
+    const result = await terminalSetupCommand.action({} as CommandContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      content: 'Failed to detect terminal',
+      messageType: 'error',
+    });
+  });
+
+  it('should handle exceptions from terminal setup', async () => {
+    vi.spyOn(terminalSetupModule, 'terminalSetup').mockRejectedValue(
+      new Error('Unexpected error'),
+    );
+
+    const result = await terminalSetupCommand.action({} as CommandContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      content: 'Failed to configure terminal: Error: Unexpected error',
+      messageType: 'error',
+    });
+  });
+});