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Test DirectoryWatcher exception on missing path. #2224

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Merged
merged 1 commit into from
Oct 27, 2025
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Test DirectoryWatcher exception on missing path. #2224

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16 changes: 16 additions & 0 deletions pkgs/watcher/test/directory_watcher/file_tests.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
// BSD-style license that can be found in the LICENSE file.

import 'dart:io' as io;
import 'dart:io';
import 'dart:isolate';

import 'package:test/test.dart';
Expand All @@ -18,6 +19,21 @@ void fileTests({required bool isNative}) {
}

void _fileTests({required bool isNative}) {
test('error reported if directory does not exist', () async {
await startWatcher(path: 'missing_path');

// TODO(davidmorgan): reconcile differences.
if (isNative && !Platform.isMacOS) {
expect(expectNoEvents, throwsA(isA<PathNotFoundException>()));
} else {
// The polling watcher and the MacOS watcher do not throw on missing file
// on watch.
await expectNoEvents();
writeFile('missing_path/file.txt');
await expectAddEvent('missing_path/file.txt');
}
});

test('does not notify for files that already exist when started', () async {
// Make some pre-existing files.
writeFile('a.txt');
Expand Down