fix: wrap tests in group to fix issue #320

[Giuspepe]

Description

This PR fixes the following issue: #320 (comment)

• Wrap each test in the generated .test_runner.dart in a group so setUp/tearDown bodies are only run for the test declaring the bodies instead of running all setUp/tearDown bodies for all tests

Changed brick

// GENERATED CODE - DO NOT MODIFY BY HAND
// Consider adding this file to your .gitignore.

import 'package:flutter_test/flutter_test.dart';

{{#tests}}import '{{{.}}}' as {{#snakeCase}}{{{.}}}{{/snakeCase}};
{{/tests}}
void main() {
{{#tests}}  group('{{#snakeCase}}{{{.}}}{{/snakeCase}}', {{#snakeCase}}{{{.}}}{{/snakeCase}}.main);
{{/tests}}}

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[felangel]

Hi @Giuspepe 👋
Thanks for opening a pull request!

Are you able to provide a link to a minimal reproduction sample that illustrates the problem you were encountering prior to wrapping each test in a group? Thanks! 🙏

[Giuspepe]

Hey @felangel, I uploaded a minimal reproduction sample here: https://github.com/Giuspepe/very_good_cli/tree/sample/wrap-tests-in-group/test

Running the tests with dart test succeeds:

giuseppe@Giuseppes-MBP very_good_cli % dart test test --reporter expanded 
00:00 +0: test/foo_test.dart: foo
00:00 +1: test/bar_test.dart: bar
00:00 +2: All tests passed!

Running the tests with very_good test fails:

(base) giuseppe@Giuseppes-MBP very_good_cli % very_good test
Running "flutter test" in /Users/giuseppe/repos/very_good_cli...
✓ Optimizing tests (1.4s)
Invalid argument(s): Object/factory with  type int is already registered inside GetIt. 
package:get_it/get_it_impl.dart 7:18   throwIf
package:get_it/get_it_impl.dart 803:5  _GetItImplementation._register
package:get_it/get_it_impl.dart 458:5  _GetItImplementation.registerFactory
test/bar_test.dart 6:20                main.<fn>

foo /Users/giuseppe/repos/very_good_cli/test/.test_runner.dart (FAILED)
Invalid argument(s): Object/factory with  type int is already registered inside GetIt. 
package:get_it/get_it_impl.dart 7:18   throwIf
package:get_it/get_it_impl.dart 803:5  _GetItImplementation._register
package:get_it/get_it_impl.dart 458:5  _GetItImplementation.registerFactory
test/bar_test.dart 6:20                main.<fn>

bar /Users/giuseppe/repos/very_good_cli/test/.test_runner.dart (FAILED)
00:01 -2: Some tests failed.

[felangel]

This has been addressed via #329