Added bottom sheet example app (#64)

bottom_sheet/test/widget_test.dart

@@ -0,0 +1,26 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility that Flutter provides. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:project/main.dart';
+
+void main() {
+  testWidgets('Checks on tap dismissal of bottom sheet', (WidgetTester tester) async {
+    // Build the app and trigger a frame.
+    await tester.pumpWidget(MyApp());
+
+    expect(find.text('BottomSheet'), findsNothing);
+
+    await tester.tap(find.text('BottomSheet'));
+    await tester.pump(); 
+    await tester.pump(const Duration(seconds: 1)); 
+    await tester.pump(const Duration(seconds: 1)); 
+    expect(find.text('BottomSheet'), findsNothing);
+
+  });
+}