// 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/foundation.dart' show FlutterError; import 'package:flutter/painting.dart'; import 'package:flutter_test/flutter_test.dart'; class TestCanvas implements Canvas { final List<Invocation> invocations = <Invocation>[]; @override void noSuchMethod(Invocation invocation) { invocations.add(invocation); } } void main() { test('Border.uniform constructor', () { const BorderSide side = BorderSide(); const Border border = Border.fromBorderSide(side); expect(border.left, same(side)); expect(border.top, same(side)); expect(border.right, same(side)); expect(border.bottom, same(side)); }); test('Border.symmetric constructor', () { const BorderSide side1 = BorderSide(color: Color(0xFFFFFFFF)); const BorderSide side2 = BorderSide(); const Border border = Border.symmetric(vertical: side1, horizontal: side2); expect(border.left, same(side1)); expect(border.top, same(side2)); expect(border.right, same(side1)); expect(border.bottom, same(side2)); }); test('Border.merge', () { const BorderSide magenta3 = BorderSide(color: Color(0xFFFF00FF), width: 3.0); const BorderSide magenta6 = BorderSide(color: Color(0xFFFF00FF), width: 6.0); const BorderSide yellow2 = BorderSide(color: Color(0xFFFFFF00), width: 2.0); const BorderSide yellowNone0 = BorderSide(color: Color(0xFFFFFF00), width: 0.0, style: BorderStyle.none); expect( Border.merge( const Border(top: yellow2), const Border(right: magenta3), ), const Border(top: yellow2, right: magenta3), ); expect( Border.merge( const Border(bottom: magenta3), const Border(bottom: magenta3), ), const Border(bottom: magenta6), ); expect( Border.merge( const Border(left: magenta3, right: yellowNone0), const Border(right: yellow2), ), const Border(left: magenta3, right: yellow2), ); expect( Border.merge(const Border(), const Border()), const Border(), ); expect( () => Border.merge( const Border(left: magenta3), const Border(left: yellow2), ), throwsAssertionError, ); }); test('Border.add', () { const BorderSide magenta3 = BorderSide(color: Color(0xFFFF00FF), width: 3.0); const BorderSide magenta6 = BorderSide(color: Color(0xFFFF00FF), width: 6.0); const BorderSide yellow2 = BorderSide(color: Color(0xFFFFFF00), width: 2.0); const BorderSide yellowNone0 = BorderSide(color: Color(0xFFFFFF00), width: 0.0, style: BorderStyle.none); expect( const Border(top: yellow2) + const Border(right: magenta3), const Border(top: yellow2, right: magenta3), ); expect( const Border(bottom: magenta3) + const Border(bottom: magenta3), const Border(bottom: magenta6), ); expect( const Border(left: magenta3, right: yellowNone0) + const Border(right: yellow2), const Border(left: magenta3, right: yellow2), ); expect( const Border() + const Border(), const Border(), ); expect( const Border(left: magenta3) + const Border(left: yellow2), isNot(isA<Border>()), // see shape_border_test.dart for better tests of this case ); const Border b3 = Border(top: magenta3); const Border b6 = Border(top: magenta6); expect(b3 + b3, b6); const Border b0 = Border(top: yellowNone0); const Border bZ = Border(); expect(b0 + b0, bZ); expect(bZ + bZ, bZ); expect(b0 + bZ, bZ); expect(bZ + b0, bZ); }); test('Border.scale', () { const BorderSide magenta3 = BorderSide(color: Color(0xFFFF00FF), width: 3.0); const BorderSide magenta6 = BorderSide(color: Color(0xFFFF00FF), width: 6.0); const BorderSide yellow2 = BorderSide(color: Color(0xFFFFFF00), width: 2.0); const BorderSide yellowNone0 = BorderSide(color: Color(0xFFFFFF00), width: 0.0, style: BorderStyle.none); const Border b3 = Border(left: magenta3); const Border b6 = Border(left: magenta6); expect(b3.scale(2.0), b6); const Border bY0 = Border(top: yellowNone0); expect(bY0.scale(3.0), bY0); const Border bY2 = Border(top: yellow2); expect(bY2.scale(0.0), bY0); }); test('Border.dimensions', () { expect( const Border( left: BorderSide(width: 2.0), top: BorderSide(width: 3.0), bottom: BorderSide(width: 5.0), right: BorderSide(width: 7.0), ).dimensions, const EdgeInsets.fromLTRB(2.0, 3.0, 7.0, 5.0), ); }); test('Border.isUniform', () { expect( const Border( left: BorderSide(width: 3.0), top: BorderSide(width: 3.0), right: BorderSide(width: 3.0), bottom: BorderSide(width: 3.1), ).isUniform, false, ); expect( const Border( left: BorderSide(width: 3.0), top: BorderSide(width: 3.0), right: BorderSide(width: 3.0), bottom: BorderSide(width: 3.0), ).isUniform, true, ); expect( const Border( left: BorderSide(color: Color(0xFFFFFFFE)), top: BorderSide(color: Color(0xFFFFFFFF)), right: BorderSide(color: Color(0xFFFFFFFF)), bottom: BorderSide(color: Color(0xFFFFFFFF)), ).isUniform, false, ); expect( const Border( left: BorderSide(color: Color(0xFFFFFFFF)), top: BorderSide(color: Color(0xFFFFFFFF)), right: BorderSide(color: Color(0xFFFFFFFF)), bottom: BorderSide(color: Color(0xFFFFFFFF)), ).isUniform, true, ); expect( const Border( left: BorderSide(style: BorderStyle.none), top: BorderSide(style: BorderStyle.none), right: BorderSide(style: BorderStyle.none), bottom: BorderSide(width: 0.0), ).isUniform, false, ); expect( const Border( left: BorderSide(style: BorderStyle.none), top: BorderSide(style: BorderStyle.none), right: BorderSide(style: BorderStyle.none), bottom: BorderSide(width: 0.0), ).isUniform, false, ); expect( const Border( left: BorderSide(style: BorderStyle.none), top: BorderSide(style: BorderStyle.none), right: BorderSide(style: BorderStyle.none), ).isUniform, false, ); expect( const Border( left: BorderSide(), top: BorderSide(strokeAlign: StrokeAlign.center), right: BorderSide(strokeAlign: StrokeAlign.outside), ).isUniform, false, ); expect( const Border().isUniform, true, ); expect( const Border().isUniform, true, ); }); test('Border.lerp', () { const Border visualWithTop10 = Border(top: BorderSide(width: 10.0)); const Border atMinus100 = Border(left: BorderSide(width: 0.0), right: BorderSide(width: 300.0)); const Border at0 = Border(left: BorderSide(width: 100.0), right: BorderSide(width: 200.0)); const Border at25 = Border(left: BorderSide(width: 125.0), right: BorderSide(width: 175.0)); const Border at75 = Border(left: BorderSide(width: 175.0), right: BorderSide(width: 125.0)); const Border at100 = Border(left: BorderSide(width: 200.0), right: BorderSide(width: 100.0)); const Border at200 = Border(left: BorderSide(width: 300.0), right: BorderSide(width: 0.0)); expect(Border.lerp(null, null, -1.0), null); expect(Border.lerp(visualWithTop10, null, -1.0), const Border(top: BorderSide(width: 20.0))); expect(Border.lerp(null, visualWithTop10, -1.0), const Border()); expect(Border.lerp(at0, at100, -1.0), atMinus100); expect(Border.lerp(null, null, 0.0), null); expect(Border.lerp(visualWithTop10, null, 0.0), const Border(top: BorderSide(width: 10.0))); expect(Border.lerp(null, visualWithTop10, 0.0), const Border()); expect(Border.lerp(at0, at100, 0.0), at0); expect(Border.lerp(null, null, 0.25), null); expect(Border.lerp(visualWithTop10, null, 0.25), const Border(top: BorderSide(width: 7.5))); expect(Border.lerp(null, visualWithTop10, 0.25), const Border(top: BorderSide(width: 2.5))); expect(Border.lerp(at0, at100, 0.25), at25); expect(Border.lerp(null, null, 0.75), null); expect(Border.lerp(visualWithTop10, null, 0.75), const Border(top: BorderSide(width: 2.5))); expect(Border.lerp(null, visualWithTop10, 0.75), const Border(top: BorderSide(width: 7.5))); expect(Border.lerp(at0, at100, 0.75), at75); expect(Border.lerp(null, null, 1.0), null); expect(Border.lerp(visualWithTop10, null, 1.0), const Border()); expect(Border.lerp(null, visualWithTop10, 1.0), const Border(top: BorderSide(width: 10.0))); expect(Border.lerp(at0, at100, 1.0), at100); expect(Border.lerp(null, null, 2.0), null); expect(Border.lerp(visualWithTop10, null, 2.0), const Border()); expect(Border.lerp(null, visualWithTop10, 2.0), const Border(top: BorderSide(width: 20.0))); expect(Border.lerp(at0, at100, 2.0), at200); }); test('Border - throws correct exception with strokeAlign', () { late FlutterError error; try { final TestCanvas canvas = TestCanvas(); // Border.all supports all StrokeAlign values. // Border() supports StrokeAlign.inside only. const Border( left: BorderSide(strokeAlign: StrokeAlign.center), right: BorderSide(strokeAlign: StrokeAlign.outside), ).paint(canvas, const Rect.fromLTWH(10.0, 20.0, 30.0, 40.0)); } on FlutterError catch (e) { error = e; } expect(error, isNotNull); expect(error.diagnostics.length, 1); expect( error.diagnostics[0].toStringDeep(), 'A Border can only draw strokeAlign different than\nStrokeAlign.inside on uniform borders.\n', ); }); test('Border.dimension', () { final Border insideBorder = Border.all(width: 10); expect(insideBorder.dimensions, const EdgeInsets.all(10)); final Border centerBorder = Border.all(width: 10, strokeAlign: StrokeAlign.center); expect(centerBorder.dimensions, const EdgeInsets.all(5)); final Border outsideBorder = Border.all(width: 10, strokeAlign: StrokeAlign.outside); expect(outsideBorder.dimensions, EdgeInsets.zero); const BorderSide insideSide = BorderSide(width: 10); const BorderDirectional insideBorderDirectional = BorderDirectional(top: insideSide, bottom: insideSide, start: insideSide, end: insideSide); expect(insideBorderDirectional.dimensions, const EdgeInsetsDirectional.all(10)); const BorderSide centerSide = BorderSide(width: 10, strokeAlign: StrokeAlign.center); const BorderDirectional centerBorderDirectional = BorderDirectional(top: centerSide, bottom: centerSide, start: centerSide, end: centerSide); expect(centerBorderDirectional.dimensions, const EdgeInsetsDirectional.all(5)); const BorderSide outsideSide = BorderSide(width: 10, strokeAlign: StrokeAlign.outside); const BorderDirectional outsideBorderDirectional = BorderDirectional(top: outsideSide, bottom: outsideSide, start: outsideSide, end: outsideSide); expect(outsideBorderDirectional.dimensions, EdgeInsetsDirectional.zero); }); }