using System.IO;
using System.Text;
using Xunit;

namespace Util.Tests.Extensions; 

/// <summary>
/// 字符串扩展测试
/// </summary>
public class StringExtensionsTest {
    /// <summary>
    /// 测试移除起始字符串 - 字符串
    /// </summary>
    [Fact]
    public void TestRemoveStart_String() {
        Assert.Equal( "bc", "abc".RemoveStart( "a" ) );
    }

    /// <summary>
    /// 测试移除末尾字符串 - 字符串
    /// </summary>
    [Fact]
    public void TestRemoveEnd_String() {
        Assert.Equal( "ab", "abc".RemoveEnd( "c" ) );
    }

    /// <summary>
    /// 测试移除起始字符串 - StringBuilder
    /// </summary>
    [Fact]
    public void TestRemoveStart_StringBuilder() {
        var builder = new StringBuilder( "abc" );
        Assert.Equal( "bc", builder.RemoveStart( "a" ).ToString() );
    }

    /// <summary>
    /// 测试移除末尾字符串 - StringBuilder
    /// </summary>
    [Fact]
    public void TestRemoveEnd_StringBuilder() {
        var builder = new StringBuilder( "abc" );
        Assert.Equal( "ab", builder.RemoveEnd( "c" ).ToString() );
    }

    /// <summary>
    /// 测试移除起始字符串 - StringWriter
    /// </summary>
    [Fact]
    public void TestRemoveStart_StringWriter() {
        var writer = new StringWriter();
        writer.Write( "abc" );
        Assert.Equal( "bc", writer.RemoveStart( "a" ).ToString() );
    }

    /// <summary>
    /// 测试移除末尾字符串 - StringWriter
    /// </summary>
    [Fact]
    public void TestRemoveEnd_StringWriter() {
        var writer = new StringWriter();
        writer.Write( "abc" );
        Assert.Equal( "ab", writer.RemoveEnd( "c" ).ToString() );
    }
}