Avalonia/tests/Perspex.Styling.UnitTests/SelectorTests_Class.cs

// Copyright (c) The Perspex Project. All rights reserved.
// Licensed under the MIT license. See licence.md file in the project root for full license information.

using System.Linq;
using System.Reactive.Linq;
using System.Threading.Tasks;
using Moq;
using Perspex.Controls;
using Perspex.Styling;
using Xunit;

namespace Perspex.Styling.UnitTests
{
    public class SelectorTests_Class
    {
        [Fact]
        public void Class_Selector_Should_Have_Correct_String_Representation()
        {
            var target = new Selector().Class("foo");

            Assert.Equal(".foo", target.ToString());
        }

        [Fact]
        public void PesudoClass_Selector_Should_Have_Correct_String_Representation()
        {
            var target = new Selector().Class(":foo");

            Assert.Equal(":foo", target.ToString());
        }

        [Fact]
        public async Task Class_Matches_Control_With_Class()
        {
            var control = new Control1
            {
                Classes = new Classes { "foo" },
            };

            var target = new Selector().Class("foo");
            var activator = target.Match(control).ObservableResult;

            Assert.True(await activator.Take(1));
        }

        [Fact]
        public async Task Class_Doesnt_Match_Control_Without_Class()
        {
            var control = new Control1
            {
                Classes = new Classes { "bar" },
            };

            var target = new Selector().Class("foo");
            var activator = target.Match(control).ObservableResult;

            Assert.False(await activator.Take(1));
        }

        [Fact]
        public async Task Class_Matches_Control_With_TemplatedParent()
        {
            var control = new Control1
            {
                Classes = new Classes { "foo" },
                TemplatedParent = new Mock<ITemplatedControl>().Object,
            };

            var target = new Selector().Class("foo");
            var activator = target.Match(control).ObservableResult;

            Assert.True(await activator.Take(1));
        }

        [Fact]
        public async Task Class_Tracks_Additions()
        {
            var control = new Control1();

            var target = new Selector().Class("foo");
            var activator = target.Match(control).ObservableResult;

            Assert.False(await activator.Take(1));
            control.Classes.Add("foo");
            Assert.True(await activator.Take(1));
        }

        [Fact]
        public async Task Class_Tracks_Removals()
        {
            var control = new Control1
            {
                Classes = new Classes { "foo" },
            };

            var target = new Selector().Class("foo");
            var activator = target.Match(control).ObservableResult;

            Assert.True(await activator.Take(1));
            control.Classes.Remove("foo");
            Assert.False(await activator.Take(1));
        }

        [Fact]
        public async Task Multiple_Classes()
        {
            var control = new Control1();
            var target = new Selector().Class("foo").Class("bar");
            var activator = target.Match(control).ObservableResult;

            Assert.False(await activator.Take(1));
            control.Classes.Add("foo");
            Assert.False(await activator.Take(1));
            control.Classes.Add("bar");
            Assert.True(await activator.Take(1));
            control.Classes.Remove("bar");
            Assert.False(await activator.Take(1));
        }

        public class Control1 : TestControlBase
        {
        }
    }
}