namespace Util.FileStorage.Tests; 

/// <summary>
/// 测试文件大小
/// </summary>
public class FileSizeTest {
    /// <summary>
    /// 文件字节数
    /// </summary>
    [Theory]
    [InlineData( FileSizeUnit.Byte, 1 )]
    [InlineData( FileSizeUnit.K, 1024 )]
    [InlineData( FileSizeUnit.M, 1024 * 1024 )]
    [InlineData( FileSizeUnit.G, 1024 * 1024 * 1024 )]
    public void TestSize( FileSizeUnit unit, long result ) {
        Assert.Equal( result, new FileSize( 1, unit ).Size );
    }

    /// <summary>
    /// 测试文件大小描述
    /// </summary>
    [Fact]
    public void TestToString() {
        Assert.Equal( "1 B", new FileSize( 1 ).ToString() );
        Assert.Equal( "1 KB", new FileSize( 1 * 1024 ).ToString() );
        Assert.Equal( "1 MB", new FileSize( 1 * 1024 * 1024 ).ToString() );
        Assert.Equal( "1 GB", new FileSize( 1 * 1024 * 1024 * 1024 ).ToString() );
    }

    /// <summary>
    /// 获取文件大小，单位：K
    /// </summary>
    [Fact]
    public void TestGetSizeByK() {
        Assert.Equal( 0, new FileSize( 0 ).GetSizeByK() );
        Assert.Equal( 1, new FileSize( 1024 ).GetSizeByK() );
        Assert.Equal( 0.5, new FileSize( 512 ).GetSizeByK() );
    }

    /// <summary>
    /// 获取文件大小，单位：M
    /// </summary>
    [Fact]
    public void TestGetSizeByM() {
        Assert.Equal( 0, new FileSize( 0 ).GetSizeByM() );
        Assert.Equal( 1, new FileSize( 1024 * 1024 ).GetSizeByM() );
        Assert.Equal( 0.5, new FileSize( 512 * 1024 ).GetSizeByM() );
    }

    /// <summary>
    /// 获取文件大小，单位：G
    /// </summary>
    [Fact]
    public void TestGetSizeByG() {
        Assert.Equal( 0, new FileSize( 0 ).GetSizeByG() );
        Assert.Equal( 1, new FileSize( 1024 * 1024 * 1024 ).GetSizeByG() );
        Assert.Equal( 0.5, new FileSize( 512 * 1024 * 1024 ).GetSizeByG() );
    }
}