update tests

thermion_dart/test/picking_tests.dart

@@ -0,0 +1,36 @@
+import 'dart:async';
+import 'package:thermion_dart/thermion_dart.dart';
+import 'package:test/test.dart';
+import 'helpers.dart';
+
+void main() async {
+  final testHelper = TestHelper("picking");
+  group("picking", () {
+    test('pick cube', () async {
+      await testHelper.withViewer((viewer) async {
+        final cube = await viewer
+            .createGeometry(GeometryHelper.cube(normals: false, uvs: false));
+        await viewer.setCameraPosition(0, 0, 10);
+        final view = await viewer.getViewAt(0);
+        final viewport = await view.getViewport();
+
+        final completer = Completer<PickResult>();
+        
+        await viewer.pick(viewport.width ~/ 2, viewport.height ~/ 2, (result) {
+          completer.complete(result);
+        });
+
+        for (int i = 0; i < 10; i++) {
+          await testHelper.capture(viewer, "pick_cube0");
+          if (completer.isCompleted) {
+            break;
+          }
+        }
+
+        expect(completer.isCompleted, true);
+        var result = await completer.future;
+        expect(result.entity, cube.entity);
+      });
+    });
+  });
+}