Avalonia/tests/Avalonia.Controls.UnitTests/Presenters/TextPresenter_Tests.cs

using System.Linq;
using Avalonia.Controls.Presenters;
using Avalonia.UnitTests;
using Xunit;

namespace Avalonia.Controls.UnitTests.Presenters
{
    public class TextPresenter_Tests
    {
        [Fact]
        public void TextPresenter_Can_Contain_Null_With_Password_Char_Set()
        {
            using (UnitTestApplication.Start(TestServices.MockPlatformRenderInterface))
            {
                var target = new TextPresenter
                {
                    PasswordChar = '*'
                };

                Assert.NotNull(target.TextLayout);
            }
        }

        [Fact]
        public void TextPresenter_Can_Contain_Null_WithOut_Password_Char_Set()
        {
            using (UnitTestApplication.Start(TestServices.MockPlatformRenderInterface))
            {

                var target = new TextPresenter();

                Assert.NotNull(target.TextLayout);
            }
        }

        [Fact]
        public void Text_Presenter_Replaces_Formatted_Text_With_Password_Char()
        {
            using (UnitTestApplication.Start(TestServices.MockPlatformRenderInterface))
            {

                var target = new TextPresenter { PasswordChar = '*', Text = "Test" };

                target.Measure(Size.Infinity);

                Assert.NotNull(target.TextLayout);

                var actual = string.Join(null,
                    target.TextLayout.TextLines.SelectMany(x => x.TextRuns).Select(x => x.Text.Span.ToString()));

                Assert.Equal("****", actual);
            }
        }
    }
}