Initial commit. I can successfully create random tensor.

test/unit_test.dart

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+// This is an example unit test.
+//
+// A unit test tests a single function, method, or class. To learn more about
+// writing unit tests, visit
+// https://flutter.dev/docs/cookbook/testing/unit/introduction
+
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('Plus Operator', () {
+    test('should add two numbers together', () {
+      expect(1 + 1, 2);
+    });
+  });
+}

test/widget_test.dart

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+// This is an example Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility in the flutter_test package. 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.
+//
+// Visit https://flutter.dev/docs/cookbook/testing/widget/introduction for
+// more information about Widget testing.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('MyWidget', () {
+    testWidgets('should display a string of text', (WidgetTester tester) async {
+      // Define a Widget
+      const myWidget = MaterialApp(
+        home: Scaffold(
+          body: Text('Hello'),
+        ),
+      );
+
+      // Build myWidget and trigger a frame.
+      await tester.pumpWidget(myWidget);
+
+      // Verify myWidget shows some text
+      expect(find.byType(Text), findsOneWidget);
+    });
+  });
+}