如何获取LogicalTypes的随机值

Question

我有一个工具,生成我需要生成一个samlpe值进行测试的实体.问题是我们有很多逻辑类型(一些相同的类型,但仍然不同)和编码我想知道是否有人有一个更容易的解决方案...

这是Enum:

public enum LogicalTypeEnum
    { 
        Identity,
        DateAndTime,
        Binary,
        Quantity,
        Comment,
        Money,
        Rate,
        TimeStamp,
        Caption,
        Reference,
        Number,
        Weight,
        Space,
        Username,
        Phone,
        Email,
        ZipCode
    }

谢谢!!!

编辑1:我想生成一个随机值,而不是从枚举中获取一个随机元素.我正在寻找一种随机的电子邮件或邮政编码或金钱价值的方法.

Answer 1

我想你必须将你的答案分成两部分:

首先从列表中获取随机枚举类型.我认为这部分已经通过提供的其他答案解决了.

之后,您希望为所选枚举创建随机值列表.因此,您需要一个可以为每种类型创建有效随机值的工厂.最接近您需求的东西应该是AutoPoco.例如,创建一堆样本对象很容易填充一些您喜欢的值

var factory = AutoPoco.AutoPocoContainer.Configure(x =>
{
    x.Conventions(c =>
    {
        c.UseDefaultConventions();
    });

    x.Include<DataRowWrapper>()
        .Setup(row => row.Timestamp).Use<DateTimeUniqueSource>()
        .Setup(row => row.Name).Use<LastNameSource>()
        .Setup(row => row.Value).Use<ApproximateNumberSource<decimal>>()
        .Setup(row => row.Description).Use<RandomReadableStringSource>(10, 20);
});

var session = factory.CreateSession();
var sampleRows = session.List<DataRowWrapper>(1000).Get();

如您所见,您可以为每个属性提供您自己的Source(.Use<...Source>()).项目中已经有一些默认来源,但我也自己做了一些如下:

public class RandomReadableStringSource : DatasourceBase<string>
{
    private readonly char[] _Vocals = new char[] { 'a', 'e', 'i', 'o', 'u' };
    private readonly char[] _Consonants = new char[] { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm', 'n', 'p', 'r', 's', 't', 'v', 'w' };

    private Random _Random;
    private int _Minimum;
    private int _Maximum;

    public RandomReadableStringSource()
        : this(20)
    { }

    public RandomReadableStringSource(int max)
        : this(5, max)
    { }

    public RandomReadableStringSource(int min, int max)
    {
        if (min <= 0)
        {
            throw new ArgumentOutOfRangeException("minimum must be greater zero.");
        }

        if (min > max)
        {
            throw new ArgumentOutOfRangeException("minimum must be less or equal maximum.");
        }

        _Random = new Random();
        _Minimum = min;
        _Maximum = max;
    }

    public override string Next(IGenerationSession session)
    {
        var length = _Random.Next(_Minimum, _Maximum);
        var sb = new StringBuilder(length);

        for (int i = 0; i < length; i++)
        {
            var array = i % 2 == 0 ? _Consonants : _Vocals;
            sb.Append(array[_Random.Next(array.Length)]);
        }

        return sb.ToString();
    }
}

public class DateTimeUniqueSource : DatasourceBase<DateTime>
{
    private Random _Random;
    private DateTime _LastDateTime;

    public DateTimeUniqueSource()
        : this(new DateTime(1900, 1, 1))
    { }

    public DateTimeUniqueSource(DateTime startdate)
    {
        if (startdate == null)
        {
            throw new ArgumentNullException("startdate");
        }

        _Random = new Random();
        _LastDateTime = startdate;
    }

    public override DateTime Next(IGenerationSession session)
    {
        _LastDateTime = _LastDateTime.AddHours(_Random.NextDouble() * 1000);
        return _LastDateTime;
    }
}

因此,您可以为每种类型创建自己的源,然后很容易创建一堆示例对象.