testing/dart/geometry_test.dart

// Copyright 2018 The Chromium Authors. 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:ui';
import 'dart:math' show pi;

import 'package:test/test.dart';

void main() {
  test('Offset.direction', () {
    expect(const Offset(0.0, 0.0).direction, 0.0);
    expect(const Offset(0.0, 1.0).direction, pi / 2.0);
    expect(const Offset(0.0, -1.0).direction, -pi / 2.0);
    expect(const Offset(1.0, 0.0).direction, 0.0);
    expect(const Offset(1.0, 1.0).direction, pi / 4.0);
    expect(const Offset(1.0, -1.0).direction, -pi / 4.0);
    expect(const Offset(-1.0, 0.0).direction, pi);
    expect(const Offset(-1.0, 1.0).direction, pi * 3.0 / 4.0);
    expect(const Offset(-1.0, -1.0).direction, -pi * 3.0 / 4.0);
  });
}