Improve code coverage for cli package (#13724)

packages/cli/src/utils/resolvePath.test.ts

@@ -0,0 +1,35 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import * as os from 'node:os';
+import * as path from 'node:path';
+import { resolvePath } from './resolvePath.js';
+
+vi.mock('node:os', () => ({
+  homedir: vi.fn(),
+}));
+
+describe('resolvePath', () => {
+  beforeEach(() => {
+    vi.mocked(os.homedir).mockReturnValue('/home/user');
+  });
+
+  it.each([
+    ['', ''],
+    ['/foo/bar', path.normalize('/foo/bar')],
+    ['~/foo', path.join('/home/user', 'foo')],
+    ['~', path.normalize('/home/user')],
+    ['%userprofile%/foo', path.join('/home/user', 'foo')],
+    ['%USERPROFILE%/foo', path.join('/home/user', 'foo')],
+  ])('resolvePath(%s) should return %s', (input, expected) => {
+    expect(resolvePath(input)).toBe(expected);
+  });
+
+  it('should handle path normalization', () => {
+    expect(resolvePath('/foo//bar/../baz')).toBe(path.normalize('/foo/baz'));
+  });
+});