aspnetcore/test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/Rendering/HtmlStringTest.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.IO;
using Microsoft.AspNetCore.Html;
using Microsoft.Extensions.WebEncoders.Testing;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.Rendering
{
    public class HtmlStringTest
    {
        [Fact]
        public void WriteTo_WritesToTheSpecifiedWriter()
        {
            // Arrange
            var expectedText = "Some Text";
            var content = new HtmlString(expectedText);
            var writer = new StringWriter();

            // Act
            content.WriteTo(writer, new HtmlTestEncoder());

            // Assert
            Assert.Equal(expectedText, writer.ToString());
            writer.Dispose();
        }

        [Fact]
        public void FromEncodedText_DoesNotEncodeOnWrite()
        {
            // Arrange
            var expectedText = "Hello";

            // Act
            var content = new HtmlString(expectedText);

            // Assert
            Assert.Equal(expectedText, content.ToString());
        }

        [Fact]
        public void Empty_ReturnsEmptyString()
        {
            // Arrange & Act
            var content = HtmlString.Empty;

            // Assert
            Assert.Equal(string.Empty, content.ToString());
        }

        [Fact]
        public void ToString_ReturnsText()
        {
            // Arrange
            var expectedText = "Hello";
            var content = new HtmlString(expectedText);

            // Act
            var result = content.ToString();

            // Assert
            Assert.Equal(expectedText, result);
        }
    }
}