packages/flutter/test/painting/edge_insets_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';

void main() {
  test('EdgeInsets constructors', () {
    // fromLTRB
    final EdgeInsets ltrbLtr = const EdgeInsets.fromLTRB(10, 20, 30, 40).resolve(TextDirection.ltr);
    expect(ltrbLtr.left, 10);
    expect(ltrbLtr.top, 20);
    expect(ltrbLtr.right, 30);
    expect(ltrbLtr.bottom, 40);
    final EdgeInsets ltrbRtl = const EdgeInsets.fromLTRB(10, 20, 30, 40).resolve(TextDirection.rtl);
    expect(ltrbRtl.left, 10);
    expect(ltrbRtl.top, 20);
    expect(ltrbRtl.right, 30);
    expect(ltrbRtl.bottom, 40);

    // all
    const EdgeInsets all = EdgeInsets.all(10);
    expect(all.resolve(TextDirection.ltr), equals(const EdgeInsets.fromLTRB(10, 10, 10, 10)));
    expect(all.resolve(TextDirection.rtl), equals(const EdgeInsets.fromLTRB(10, 10, 10, 10)));

    // only
    const EdgeInsets only = EdgeInsets.only(left: 10, top: 20, right: 30, bottom: 40);
    expect(only.resolve(TextDirection.ltr), equals(const EdgeInsets.fromLTRB(10, 20, 30, 40)));
    expect(only.resolve(TextDirection.rtl), equals(const EdgeInsets.fromLTRB(10, 20, 30, 40)));

    // symmetric
    const EdgeInsets symmetric = EdgeInsets.symmetric(horizontal: 10, vertical: 20);
    expect(symmetric.resolve(TextDirection.ltr), equals(const EdgeInsets.fromLTRB(10, 20, 10, 20)));
    expect(symmetric.resolve(TextDirection.rtl), equals(const EdgeInsets.fromLTRB(10, 20, 10, 20)));
  });

  test('EdgeInsetsDirectional constructors', () {
    // fromSTEB
    final EdgeInsets stebLtr = const EdgeInsetsDirectional.fromSTEB(10, 20, 30, 40).resolve(TextDirection.ltr);
    expect(stebLtr.left, 10);
    expect(stebLtr.top, 20);
    expect(stebLtr.right, 30);
    expect(stebLtr.bottom, 40);
    final EdgeInsets stebRtl = const EdgeInsetsDirectional.fromSTEB(10, 20, 30, 40).resolve(TextDirection.rtl);
    expect(stebRtl.left, 30);
    expect(stebRtl.top, 20);
    expect(stebRtl.right, 10);
    expect(stebRtl.bottom, 40);

    // all
    const EdgeInsetsDirectional all = EdgeInsetsDirectional.all(10);
    expect(all.resolve(TextDirection.ltr), equals(const EdgeInsets.fromLTRB(10, 10, 10, 10)));
    expect(all.resolve(TextDirection.rtl), equals(const EdgeInsets.fromLTRB(10, 10, 10, 10)));

    // only
    const EdgeInsetsDirectional directional = EdgeInsetsDirectional.only(start: 10, top: 20, end: 30, bottom: 40);
    expect(directional.resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(10, 20, 30, 40));
    expect(directional.resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(30, 20, 10, 40));

    // symmetric
    const EdgeInsetsDirectional symmetric = EdgeInsetsDirectional.symmetric(horizontal: 10, vertical: 20);
    expect(symmetric.resolve(TextDirection.ltr), equals(const EdgeInsets.fromLTRB(10, 20, 10, 20)));
    expect(symmetric.resolve(TextDirection.rtl), equals(const EdgeInsets.fromLTRB(10, 20, 10, 20)));
  });

  test('EdgeInsets control test', () {
    const EdgeInsets insets = EdgeInsets.fromLTRB(5.0, 7.0, 11.0, 13.0);

    expect(insets, hasOneLineDescription);
    expect(insets.hashCode, equals(const EdgeInsets.fromLTRB(5.0, 7.0, 11.0, 13.0).hashCode));

    expect(insets.topLeft, const Offset(5.0, 7.0));
    expect(insets.topRight, const Offset(-11.0, 7.0));
    expect(insets.bottomLeft, const Offset(5.0, -13.0));
    expect(insets.bottomRight, const Offset(-11.0, -13.0));

    expect(insets.collapsedSize, const Size(16.0, 20.0));
    expect(insets.flipped, const EdgeInsets.fromLTRB(11.0, 13.0, 5.0, 7.0));

    expect(insets.along(Axis.horizontal), equals(16.0));
    expect(insets.along(Axis.vertical), equals(20.0));

    expect(
      insets.inflateRect(const Rect.fromLTRB(23.0, 32.0, 124.0, 143.0)),
      const Rect.fromLTRB(18.0, 25.0, 135.0, 156.0),
    );

    expect(
      insets.deflateRect(const Rect.fromLTRB(23.0, 32.0, 124.0, 143.0)),
      const Rect.fromLTRB(28.0, 39.0, 113.0, 130.0),
    );

    expect(insets.inflateSize(const Size(100.0, 125.0)), const Size(116.0, 145.0));
    expect(insets.deflateSize(const Size(100.0, 125.0)), const Size(84.0, 105.0));

    expect(insets / 2.0, const EdgeInsets.fromLTRB(2.5, 3.5, 5.5, 6.5));
    expect(insets ~/ 2.0, const EdgeInsets.fromLTRB(2.0, 3.0, 5.0, 6.0));
    expect(insets % 5.0, const EdgeInsets.fromLTRB(0.0, 2.0, 1.0, 3.0));

  });

  test('EdgeInsets.lerp()', () {
    const EdgeInsets a = EdgeInsets.all(10.0);
    const EdgeInsets b = EdgeInsets.all(20.0);
    expect(EdgeInsets.lerp(a, b, 0.25), equals(a * 1.25));
    expect(EdgeInsets.lerp(a, b, 0.25), equals(b * 0.625));
    expect(EdgeInsets.lerp(a, b, 0.25), equals(a + const EdgeInsets.all(2.5)));
    expect(EdgeInsets.lerp(a, b, 0.25), equals(b - const EdgeInsets.all(7.5)));

    expect(EdgeInsets.lerp(null, null, 0.25), isNull);
    expect(EdgeInsets.lerp(null, b, 0.25), equals(b * 0.25));
    expect(EdgeInsets.lerp(a, null, 0.25), equals(a * 0.75));
  });

  test('EdgeInsets.resolve()', () {
    expect(const EdgeInsetsDirectional.fromSTEB(10.0, 20.0, 30.0, 40.0).resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(10.0, 20.0, 30.0, 40.0));
    expect(const EdgeInsetsDirectional.fromSTEB(99.0, 98.0, 97.0, 96.0).resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(97.0, 98.0, 99.0, 96.0));
    expect(const EdgeInsetsDirectional.all(50.0).resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(50.0, 50.0, 50.0, 50.0));
    expect(const EdgeInsetsDirectional.all(50.0).resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(50.0, 50.0, 50.0, 50.0));
    expect(const EdgeInsetsDirectional.only(start: 963.25).resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(963.25, 0.0, 0.0, 0.0));
    expect(const EdgeInsetsDirectional.only(top: 963.25).resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(0.0, 963.25, 0.0, 0.0));
    expect(const EdgeInsetsDirectional.only(end: 963.25).resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(0.0, 0.0, 963.25, 0.0));
    expect(const EdgeInsetsDirectional.only(bottom: 963.25).resolve(TextDirection.ltr), const EdgeInsets.fromLTRB(0.0, 0.0, 0.0, 963.25));
    expect(const EdgeInsetsDirectional.only(start: 963.25).resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(0.0, 0.0, 963.25, 0.0));
    expect(const EdgeInsetsDirectional.only(top: 963.25).resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(0.0, 963.25, 0.0, 0.0));
    expect(const EdgeInsetsDirectional.only(end: 963.25).resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(963.25, 0.0, 0.0, 0.0));
    expect(const EdgeInsetsDirectional.only(bottom: 963.25).resolve(TextDirection.rtl), const EdgeInsets.fromLTRB(0.0, 0.0, 0.0, 963.25));
    expect(EdgeInsetsDirectional.only(), EdgeInsetsDirectional.only()); // ignore: prefer_const_constructors
    expect(const EdgeInsetsDirectional.only(top: 1.0), isNot(const EdgeInsetsDirectional.only(bottom: 1.0)));
    expect(
      const EdgeInsetsDirectional.fromSTEB(10.0, 20.0, 30.0, 40.0).resolve(TextDirection.ltr),
      const EdgeInsetsDirectional.fromSTEB(30.0, 20.0, 10.0, 40.0).resolve(TextDirection.rtl),
    );
    expect(
      const EdgeInsetsDirectional.fromSTEB(10.0, 20.0, 30.0, 40.0).resolve(TextDirection.ltr),
      isNot(const EdgeInsetsDirectional.fromSTEB(30.0, 20.0, 10.0, 40.0).resolve(TextDirection.ltr)),
    );
    expect(
      const EdgeInsetsDirectional.fromSTEB(10.0, 20.0, 30.0, 40.0).resolve(TextDirection.ltr),
      isNot(const EdgeInsetsDirectional.fromSTEB(10.0, 20.0, 30.0, 40.0).resolve(TextDirection.rtl)),
    );
  });

  test('EdgeInsets equality', () {
    final double $5 = nonconst(5.0);
    expect(EdgeInsetsDirectional.only(top: $5, bottom: 7.0), EdgeInsetsDirectional.only(top: $5, bottom: 7.0));
    expect(EdgeInsets.only(top: $5, bottom: 7.0), EdgeInsetsDirectional.only(top: $5, bottom: 7.0));
    expect(EdgeInsetsDirectional.only(top: $5, bottom: 7.0), EdgeInsets.only(top: $5, bottom: 7.0));
    expect(EdgeInsets.only(top: $5, bottom: 7.0), EdgeInsets.only(top: $5, bottom: 7.0));
    expect(EdgeInsetsDirectional.only(start: $5), EdgeInsetsDirectional.only(start: $5));
    expect(const EdgeInsets.only(left: 5.0), isNot(const EdgeInsetsDirectional.only(start: 5.0)));
    expect(const EdgeInsetsDirectional.only(start: 5.0), isNot(const EdgeInsets.only(left: 5.0)));
    expect(EdgeInsets.only(left: $5), EdgeInsets.only(left: $5));
    expect(EdgeInsetsDirectional.only(end: $5), EdgeInsetsDirectional.only(end: $5));
    expect(const EdgeInsets.only(right: 5.0), isNot(const EdgeInsetsDirectional.only(end: 5.0)));
    expect(const EdgeInsetsDirectional.only(end: 5.0), isNot(const EdgeInsets.only(right: 5.0)));
    expect(EdgeInsets.only(right: $5), EdgeInsets.only(right: $5));
    expect(const EdgeInsetsDirectional.only(end: 5.0).add(const EdgeInsets.only(right: 5.0)), const EdgeInsetsDirectional.only(end: 5.0).add(const EdgeInsets.only(right: 5.0)));
    expect(const EdgeInsetsDirectional.only(end: 5.0).add(const EdgeInsets.only(right: 5.0)), isNot(const EdgeInsetsDirectional.only(end: 5.0).add(const EdgeInsets.only(left: 5.0))));
    expect(const EdgeInsetsDirectional.only(top: 1.0).add(const EdgeInsets.only(top: 2.0)), const EdgeInsetsDirectional.only(top: 3.0));
    expect(const EdgeInsetsDirectional.only(top: 1.0).add(const EdgeInsets.only(top: 2.0)), const EdgeInsets.only(top: 3.0));
  });

  test('EdgeInsets copyWith', () {
    const EdgeInsets sourceEdgeInsets = EdgeInsets.only(left: 1.0, top: 2.0, bottom: 3.0, right: 4.0);
    final EdgeInsets copy = sourceEdgeInsets.copyWith(left: 5.0, top: 6.0);
    expect(copy, const EdgeInsets.only(left: 5.0, top: 6.0, bottom: 3.0, right: 4.0));
  });

  test('EdgeInsetsGeometry.lerp(...)', () {
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(end: 10.0), null, 0.5), const EdgeInsetsDirectional.only(end: 5.0));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(start: 10.0), null, 0.5), const EdgeInsetsDirectional.only(start: 5.0));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(top: 10.0), null, 0.5), const EdgeInsetsDirectional.only(top: 5.0));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(bottom: 10.0), null, 0.5), const EdgeInsetsDirectional.only(bottom: 5.0));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(bottom: 10.0), EdgeInsetsDirectional.zero, 0.5), const EdgeInsetsDirectional.only(bottom: 5.0));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(bottom: 10.0), EdgeInsets.zero, 0.5), const EdgeInsetsDirectional.only(bottom: 5.0));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(start: 10.0), const EdgeInsets.only(left: 20.0), 0.5), const EdgeInsetsDirectional.only(start: 5.0).add(const EdgeInsets.only(left: 10.0)));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsetsDirectional.only(bottom: 1.0), const EdgeInsetsDirectional.only(start: 1.0, bottom: 1.0).add(const EdgeInsets.only(right: 2.0)), 0.5), const EdgeInsetsDirectional.only(start: 0.5).add(const EdgeInsets.only(right: 1.0, bottom: 1.0)));
    expect(EdgeInsetsGeometry.lerp(const EdgeInsets.only(bottom: 1.0), const EdgeInsetsDirectional.only(end: 1.0, bottom: 1.0).add(const EdgeInsets.only(right: 2.0)), 0.5), const EdgeInsetsDirectional.only(end: 0.5).add(const EdgeInsets.only(right: 1.0, bottom: 1.0)));
  });

  test('EdgeInsetsGeometry.lerp(normal, ...)', () {
    const EdgeInsets a = EdgeInsets.all(10.0);
    const EdgeInsets b = EdgeInsets.all(20.0);
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(a * 1.25));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(b * 0.625));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(a + const EdgeInsets.all(2.5)));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(b - const EdgeInsets.all(7.5)));

    expect(EdgeInsetsGeometry.lerp(null, null, 0.25), isNull);
    expect(EdgeInsetsGeometry.lerp(null, b, 0.25), equals(b * 0.25));
    expect(EdgeInsetsGeometry.lerp(a, null, 0.25), equals(a * 0.75));
  });

  test('EdgeInsetsGeometry.lerp(directional, ...)', () {
    const EdgeInsetsDirectional a = EdgeInsetsDirectional.only(start: 10.0, end: 10.0);
    const EdgeInsetsDirectional b = EdgeInsetsDirectional.only(start: 20.0, end: 20.0);
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(a * 1.25));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(b * 0.625));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(a + const EdgeInsetsDirectional.only(start: 2.5, end: 2.5)));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(b - const EdgeInsetsDirectional.only(start: 7.5, end: 7.5)));

    expect(EdgeInsetsGeometry.lerp(null, null, 0.25), isNull);
    expect(EdgeInsetsGeometry.lerp(null, b, 0.25), equals(b * 0.25));
    expect(EdgeInsetsGeometry.lerp(a, null, 0.25), equals(a * 0.75));
  });

  test('EdgeInsetsGeometry.lerp(mixed, ...)', () {
    final EdgeInsetsGeometry a = const EdgeInsetsDirectional.only(start: 10.0, end: 10.0).add(const EdgeInsets.all(1.0));
    final EdgeInsetsGeometry b = const EdgeInsetsDirectional.only(start: 20.0, end: 20.0).add(const EdgeInsets.all(2.0));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(a * 1.25));
    expect(EdgeInsetsGeometry.lerp(a, b, 0.25), equals(b * 0.625));

    expect(EdgeInsetsGeometry.lerp(null, null, 0.25), isNull);
    expect(EdgeInsetsGeometry.lerp(null, b, 0.25), equals(b * 0.25));
    expect(EdgeInsetsGeometry.lerp(a, null, 0.25), equals(a * 0.75));
  });

  test('EdgeInsets operators', () {
    const EdgeInsets a = EdgeInsets.fromLTRB(1.0, 2.0, 3.0, 5.0);
    expect(a * 2.0, const EdgeInsets.fromLTRB(2.0, 4.0, 6.0, 10.0));
    expect(a / 2.0, const EdgeInsets.fromLTRB(0.5, 1.0, 1.5, 2.5));
    expect(a % 2.0, const EdgeInsets.fromLTRB(1.0, 0.0, 1.0, 1.0));
    expect(a ~/ 2.0, const EdgeInsets.fromLTRB(0.0, 1.0, 1.0, 2.0));
    expect(a + a, a * 2.0);
    expect(a - a, EdgeInsets.zero);
    expect(a.add(a), a * 2.0);
    expect(a.subtract(a), EdgeInsets.zero);
  });

  test('EdgeInsetsDirectional operators', () {
    const EdgeInsetsDirectional a = EdgeInsetsDirectional.fromSTEB(1.0, 2.0, 3.0, 5.0);
    expect(a * 2.0, const EdgeInsetsDirectional.fromSTEB(2.0, 4.0, 6.0, 10.0));
    expect(a / 2.0, const EdgeInsetsDirectional.fromSTEB(0.5, 1.0, 1.5, 2.5));
    expect(a % 2.0, const EdgeInsetsDirectional.fromSTEB(1.0, 0.0, 1.0, 1.0));
    expect(a ~/ 2.0, const EdgeInsetsDirectional.fromSTEB(0.0, 1.0, 1.0, 2.0));
    expect(a + a, a * 2.0);
    expect(a - a, EdgeInsetsDirectional.zero);
    expect(a.add(a), a * 2.0);
    expect(a.subtract(a), EdgeInsetsDirectional.zero);
  });

  test('EdgeInsetsGeometry operators', () {
    final EdgeInsetsGeometry a = const EdgeInsetsDirectional.fromSTEB(1.0, 2.0, 3.0, 5.0).add(EdgeInsets.zero);
    expect(a, isNot(isA<EdgeInsetsDirectional>()));
    expect(a * 2.0, const EdgeInsetsDirectional.fromSTEB(2.0, 4.0, 6.0, 10.0));
    expect(a / 2.0, const EdgeInsetsDirectional.fromSTEB(0.5, 1.0, 1.5, 2.5));
    expect(a % 2.0, const EdgeInsetsDirectional.fromSTEB(1.0, 0.0, 1.0, 1.0));
    expect(a ~/ 2.0, const EdgeInsetsDirectional.fromSTEB(0.0, 1.0, 1.0, 2.0));
    expect(a.add(a), a * 2.0);
    expect(a.subtract(a), EdgeInsetsDirectional.zero);
    expect(a.subtract(a), EdgeInsets.zero);
  });

  test('EdgeInsetsGeometry toString', () {
    expect(EdgeInsets.zero.toString(), 'EdgeInsets.zero');
    expect(const EdgeInsets.only(top: 1.01, left: 1.01, right: 1.01, bottom: 1.01).toString(), 'EdgeInsets.all(1.0)');
    expect(const EdgeInsetsDirectional.only(start: 1.01, end: 1.01, top: 1.01, bottom: 1.01).toString(), 'EdgeInsetsDirectional(1.0, 1.0, 1.0, 1.0)');
    expect(const EdgeInsetsDirectional.only(start: 4.0).add(const EdgeInsets.only(top: 3.0)).toString(), 'EdgeInsetsDirectional(4.0, 3.0, 0.0, 0.0)');
    expect(const EdgeInsetsDirectional.only(top: 4.0).add(const EdgeInsets.only(right: 3.0)).toString(), 'EdgeInsets(0.0, 4.0, 3.0, 0.0)');
    expect(const EdgeInsetsDirectional.only(start: 4.0).add(const EdgeInsets.only(left: 3.0)).toString(), 'EdgeInsets(3.0, 0.0, 0.0, 0.0) + EdgeInsetsDirectional(4.0, 0.0, 0.0, 0.0)');
  });
}