pkg/linter/test/rules/prefer_is_not_empty_test.dart

// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../rule_test_support.dart';

void main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(PreferIsNotEmptyTest);
  });
}

@reflectiveTest
class PreferIsNotEmptyTest extends LintRuleTest {
  @override
  String get lintRule => 'prefer_is_not_empty';

  test_iterable_isEmpty() async {
    await assertNoDiagnostics(r'''
void f(Iterable<int> p) {
  p.isEmpty;
}
''');
  }

  test_iterable_isEmpty_not() async {
    await assertDiagnosticsFromMarkup(r'''
void f(Iterable<int> p) {
  [!!p.isEmpty!];
}
''');
  }

  test_list_isEmpty() async {
    await assertNoDiagnostics(r'''
var x = [].isEmpty;
''');
  }

  test_list_isEmpty_doubleParens_not() async {
    await assertDiagnosticsFromMarkup(r'''
var x = [!!(([4].isEmpty))!];
''');
  }

  test_list_isEmpty_not() async {
    await assertDiagnosticsFromMarkup(r'''
var x = [!![1].isEmpty!];
''');
  }

  test_list_isEmpty_parens_not() async {
    await assertDiagnosticsFromMarkup(r'''
var x = [!!([3].isEmpty)!];
''');
  }

  test_map_isEmpty() async {
    await assertNoDiagnostics(r'''
var x = {}.isEmpty;
''');
  }

  test_map_isEmpty_not() async {
    await assertDiagnosticsFromMarkup(r'''
var x = [!!{2: 'a'}.isEmpty!];
''');
  }
}