test: add atom_test

mobx/CHANGELOG.md

@@ -1,3 +1,10 @@
+## 2.1.4
+
+- Allow users to bypass observability system for performance by [@fzyzcjy](https://github.com/fzyzcjy) in [#844](https://github.com/mobxjs/mobx.dart/pull/844)
+- Avoid unnecessary observable notifications of @observable fields of Stores by [@fzyzcjy](https://github.com/fzyzcjy) in [#844](https://github.com/mobxjs/mobx.dart/pull/844)
+- Fix Reaction lacks toString, so cannot see which reaction causes the error by [@fzyzcjy](https://github.com/fzyzcjy) in [#844](https://github.com/mobxjs/mobx.dart/pull/844)
+- Add StackTrace to reactions in debug mode to easily spot which reaction it is by [@fzyzcjy](https://github.com/fzyzcjy) in [#844](https://github.com/mobxjs/mobx.dart/pull/844)
+
 ## 2.1.2 - 2.1.3
 
 - Fix tests in dart 2.19 - [@amondnet](https://github.com/amondnet)

mobx/lib/version.dart

@@ -1,4 +1,4 @@
 // Generated via set_version.dart. !!!DO NOT MODIFY BY HAND!!!
 
 /// The current version as per `pubspec.yaml`.
-const version = '2.1.3';
+const version = '2.1.4';

mobx/pubspec.yaml

@@ -1,5 +1,5 @@
 name: mobx
-version: 2.1.3
+version: 2.1.4
 description: "MobX is a library for reactively managing the state of your applications. Use the power of observables, actions, and reactions to supercharge your Dart and Flutter apps."
 
 homepage: https://github.com/mobxjs/mobx.dart

mobx/test/all_tests.dart

@@ -32,6 +32,7 @@ import 'reactive_policies_test.dart' as reactive_policies_test;
 import 'spy_test.dart' as spy_test;
 import 'store_test.dart' as store_test;
 import 'when_test.dart' as when_test;
+import 'atom_test.dart' as atom_test;
 
 void main() {
   observable_test.main();
@@ -71,4 +72,6 @@ void main() {
 
   spy_test.main();
   store_test.main();
+
+  atom_test.main();
 }

mobx/test/atom_test.dart

@@ -0,0 +1,31 @@
+import 'package:mobx/mobx.dart';
+import 'package:mobx/src/utils.dart';
+import 'package:test/test.dart';
+
+import 'util.dart';
+
+void main() {
+  testSetup();
+
+  group('Atom', () {
+    test('toString', () {
+      final object = Atom(name: 'MyName');
+      expect(object.toString(), contains('MyName'));
+    });
+
+    test('debugCreationStack', () {
+      DebugCreationStack.enable = true;
+      addTearDown(() => DebugCreationStack.enable = false);
+      final object = Atom();
+      expect(object.debugCreationStack, isNotNull);
+    });
+
+    test('isBeingObserved', () {
+      final observable = Observable(1, name: 'MyName');
+      expect(observable.isBeingObserved, false);
+      final d = autorun((_) => observable.value);
+      expect(observable.isBeingObserved, true);
+      d();
+    });
+  });
+}