1 files changed, 55 insertions, 0 deletions
diff --git a/packages/cli/src/commands/mcp.test.ts b/packages/cli/src/commands/mcp.test.ts
new file mode 100644
index 00000000..b4e9980c
--- /dev/null
+++ b/packages/cli/src/commands/mcp.test.ts
@@ -0,0 +1,55 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi } from 'vitest';
+import { mcpCommand } from './mcp.js';
+import { type Argv } from 'yargs';
+import yargs from 'yargs';
+
+describe('mcp command', () => {
+  it('should have correct command definition', () => {
+    expect(mcpCommand.command).toBe('mcp');
+    expect(mcpCommand.describe).toBe('Manage MCP servers');
+    expect(typeof mcpCommand.builder).toBe('function');
+    expect(typeof mcpCommand.handler).toBe('function');
+  });
+
+  it('should have exactly one option (help flag)', () => {
+    // Test to ensure that the global 'gemini' flags are not added to the mcp command
+    const yargsInstance = yargs();
+    const builtYargs = mcpCommand.builder(yargsInstance);
+    const options = builtYargs.getOptions();
+
+    // Should have exactly 1 option (help flag)
+    expect(Object.keys(options.key).length).toBe(1);
+    expect(options.key).toHaveProperty('help');
+  });
+
+  it('should register add, remove, and list subcommands', () => {
+    const mockYargs = {
+      command: vi.fn().mockReturnThis(),
+      demandCommand: vi.fn().mockReturnThis(),
+      version: vi.fn().mockReturnThis(),
+    };
+
+    mcpCommand.builder(mockYargs as unknown as Argv);
+
+    expect(mockYargs.command).toHaveBeenCalledTimes(3);
+
+    // Verify that the specific subcommands are registered
+    const commandCalls = mockYargs.command.mock.calls;
+    const commandNames = commandCalls.map((call) => call[0].command);
+
+    expect(commandNames).toContain('add <name> <commandOrUrl> [args...]');
+    expect(commandNames).toContain('remove <name>');
+    expect(commandNames).toContain('list');
+
+    expect(mockYargs.demandCommand).toHaveBeenCalledWith(
+      1,
+      'You need at least one command before continuing.',
+    );
+  });
+});