anchor.diff:  // Copyright (c) 2017, Ilya Gyrdymov. All rights reserved. Use of this source code
   // is governed by a BSD-style license that can be found in the LICENSE file.
   
  +import 'dart:typed_data';
   import 'package:dart_ml/dart_ml.dart' show TypedVector;
   import 'package:test/test.dart';
   import 'package:matcher/matcher.dart';
  
positive.code:     });
  
      test('Vector length updating: ', () {
        vector1.length = 8;
        expect(vector1.length, 8);
  
  
negative.code:   TypedVector vector2;
  
    group('Vector fundamental', () {
      tearDown(() {
        vector1 = null;
        vector2 = null;
      });
  
      test('Vector initialization via `from` constructor: ', () {
        vector1 = new TypedVector.from([1.0, 2.0, 3.0, 4.0, 5.0, 6.0]);
  
        expect(vector1[0], equals(1.0));
        expect(vector1[4], equals(5.0));
        expect(vector1[5], equals(6.0));
  