packages/flutter/test/painting/beveled_rectangle_border_test.dart

// Copyright 2014 The Flutter 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 'package:flutter/painting.dart';
import 'package:flutter_test/flutter_test.dart';

import '../rendering/mock_canvas.dart';

void main() {
  test('BeveledRectangleBorder scale and lerp', () {
    final BeveledRectangleBorder c10 = BeveledRectangleBorder(side: const BorderSide(width: 10.0), borderRadius: BorderRadius.circular(100.0));
    final BeveledRectangleBorder c15 = BeveledRectangleBorder(side: const BorderSide(width: 15.0), borderRadius: BorderRadius.circular(150.0));
    final BeveledRectangleBorder c20 = BeveledRectangleBorder(side: const BorderSide(width: 20.0), borderRadius: BorderRadius.circular(200.0));
    expect(c10.dimensions, const EdgeInsets.all(10.0));
    expect(c10.scale(2.0), c20);
    expect(c20.scale(0.5), c10);
    expect(ShapeBorder.lerp(c10, c20, 0.0), c10);
    expect(ShapeBorder.lerp(c10, c20, 0.5), c15);
    expect(ShapeBorder.lerp(c10, c20, 1.0), c20);
  });

  test('BeveledRectangleBorder BorderRadius.zero', () {
    const Rect rect1 = Rect.fromLTRB(10.0, 20.0, 30.0, 40.0);
    final Matcher looksLikeRect1 = isPathThat(
      includes: const <Offset>[ Offset(10.0, 20.0), Offset(20.0, 30.0) ],
      excludes: const <Offset>[ Offset(9.0, 19.0), Offset(31.0, 41.0) ],
    );

    // Default border radius and border side are zero, i.e. just a rectangle.
    expect(const BeveledRectangleBorder().getOuterPath(rect1), looksLikeRect1);
    expect(const BeveledRectangleBorder().getInnerPath(rect1), looksLikeRect1);


    // Represents the inner path when borderSide.width = 4, which is just rect1
    // inset by 4 on all sides.
    final Matcher looksLikeInnerPath = isPathThat(
      includes: const <Offset>[ Offset(14.0, 24.0), Offset(16.0, 26.0) ],
      excludes: const <Offset>[ Offset(9.0, 23.0), Offset(27.0, 37.0) ],
    );

    const BorderSide side = BorderSide(width: 4.0);
    expect(const BeveledRectangleBorder(side: side).getOuterPath(rect1), looksLikeRect1);
    expect(const BeveledRectangleBorder(side: side).getInnerPath(rect1), looksLikeInnerPath);
  });

  test('BeveledRectangleBorder non-zero BorderRadius', () {
    const Rect rect = Rect.fromLTRB(10.0, 20.0, 30.0, 40.0);
    final Matcher looksLikeRect = isPathThat(
      includes: const <Offset>[ Offset(15.0, 25.0), Offset(20.0, 30.0) ],
      excludes: const <Offset>[ Offset(10.0, 20.0), Offset(30.0, 40.0) ],
    );
    const BeveledRectangleBorder border = BeveledRectangleBorder(
      borderRadius: BorderRadius.all(Radius.circular(5.0))
    );
    expect(border.getOuterPath(rect), looksLikeRect);
    expect(border.getInnerPath(rect), looksLikeRect);
  });

}