Add Windows-only test for libedax initialization with non-ASCII book file paths

[Copilot]

Verifies that libedax can initialize correctly when the book file path contains non-ASCII characters — a scenario relevant to Windows users with non-Latin system locales or usernames.

Changes

• test/edax_command_test.dart: Added a Platform.isWindows-gated test group that:
  • Creates a temp directory with a non-ASCII prefix (非ASCII_) under Directory.systemTemp
  • Copies resources/test_book.dat into it as 本.dat
  • Initializes libedax with the non-ASCII path and asserts book moves load successfully
  • Cleans up the temp directory via finally

if (Platform.isWindows)
  group('non-ASCII path (Windows only)', () {
    test('initialize with non-ASCII book file path', () {
      final tempDir = Directory.systemTemp.createTempSync('非ASCII_');
      try {
        final nonAsciiBookFile = '${tempDir.path}/本.dat';
        File(_testBookFile).copySync(nonAsciiBookFile);
        final edax = LibEdax()
          ..libedaxInitialize(['', '-book-file', nonAsciiBookFile]);
        sleep(const Duration(seconds: 1));
        edax.edaxInit();
        final moveList = edax.edaxGetBookMove();
        expect(moveList.isNotEmpty, true);
        edax.libedaxTerminate();
      } finally {
        tempDir.deleteSync(recursive: true);
      }
    });
  });

Original prompt

Implement a Windows-only test to verify that libedax can initialize using non-ASCII paths for book files. In test/edax_command_test.dart, add a new test group guarded by Platform.isWindows that:

• Creates a temporary directory under Directory.systemTemp with a non-ASCII name.
• Copies the existing resources/test_book.dat into that directory with a non-ASCII filename (e.g., 本.dat).
• Calls LibEdax().libedaxInitialize(['', '-book-file', ]), then edaxInit() and edaxVersion(), and finally libedaxTerminate(), asserting no exceptions.
• Cleans up the temporary directory afterward.
  Add necessary imports (e.g., path package) to support path joining if required. Reuse existing test fixture resources/test_book.dat; do not add new assets. Ensure the test exits early on non-Windows platforms using Platform.isWindows guard. Keep style consistent with existing tests (e.g., sleep duration before commands).

This pull request was created from Copilot chat.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.84%. Comparing base (2f69fac) to head (f7a513a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #902      +/-   ##
==========================================
+ Coverage   82.56%   82.84%   +0.28%     
==========================================
  Files          15       15              
  Lines         780      793      +13     
==========================================
+ Hits          644      657      +13     
  Misses        136      136              

Flag	Coverage Δ
macos-latest	82.59% <100.00%> (+0.29%)	⬆️
ubuntu-latest	82.47% <100.00%> (+0.29%)	⬆️
unit_test	82.84% <100.00%> (+0.28%)	⬆️
windows-latest	82.84% <100.00%> (+0.28%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
test/edax_command_test.dart	99.70% <100.00%> (+0.01%)	⬆️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.