✨ Added test util and bool typedef

Author: Guldem

lib/common/type_defs.dart

@@ -0,0 +1,5 @@
+// Single bool function is clear enough.
+// ignore_for_file: avoid_positional_boolean_parameters
+
+/// Single bool function is clear enough.
+typedef SingleBoolFunc = void Function(bool);

lib/dcc_toolkit.dart

@@ -5,5 +5,8 @@ export 'common/extensions/color.dart';
 export 'common/extensions/iterable.dart';
 export 'common/extensions/text_theme.dart';
 export 'common/result/result.dart';
+export 'common/type_defs.dart';
 export 'logger/bolt_logger.dart';
 export 'style/style.dart';
+export 'test_util/devices_sizes.dart';
+export 'test_util/presentation_event_catcher.dart';

lib/test_util/devices_sizes.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+
+/// Device sizes for testing.
+class DeviceSizes {
+  /// iPhone 11 screen size.
+  static const BoxConstraints iphone11 = BoxConstraints(minWidth: 414, maxWidth: 414, minHeight: 896, maxHeight: 896);
+
+  /// Create a square [BoxConstraints] with the given [size].
+  static BoxConstraints square(double size) =>
+      BoxConstraints(minWidth: size, maxWidth: size, minHeight: size, maxHeight: size);
+
+  /// Create [BoxConstraints] from the given [size].
+  static BoxConstraints fromSize(Size size) =>
+      BoxConstraints(minWidth: size.width, maxWidth: size.width, minHeight: size.height, maxHeight: size.height);
+}
+
+/// Extension for [BoxConstraints] to copy the size.
+extension BoxConstraintsX on BoxConstraints {
+  /// Copy the size of the [BoxConstraints] with the given [width] and [height].
+  BoxConstraints copySize({double? width, double? height}) =>
+      copyWith(minWidth: width, maxWidth: width, minHeight: height, maxHeight: height);
+}

lib/test_util/presentation_event_catcher.dart

@@ -0,0 +1,8 @@
+import 'package:bloc_presentation/bloc_presentation.dart';
+
+/// Catch events from a [BlocPresentationMixin] and add them to a list.
+C catchEventIn<C extends BlocPresentationMixin<S, E>, S, E>(C cubit, List<E> events) {
+  cubit.presentation.listen(events.add);
+
+  return cubit;
+}