从所有值的子集创建匿名枚举值 [英] Create anonymous enum value from a subset of all values

问题描述

假设我们有一个枚举类型定义为:

Let's say we have an enum type defined as:

enum Statuses
{
    Completed,
    Pending,
    NotStarted,
    Started
}

我想让Autofixture为我创建一个值，例如待处理.

I'd like to make Autofixture create a value for me other than e.g. Pending.

因此(假设是循环生成)，我想获得:

So (assuming round-robin generation) I'd like to obtain:

已完成，未启动，已启动，已完成，未启动，...

Completed, NotStarted, Started, Completed, NotStarted, ...

推荐答案

最简单的方法是使用AutoFixture的 Generator< T> :

The easiest way to do that is with AutoFixture's Generator<T>:

var statuses = fixture
    .Create<Generator<Statuses>>()
    .Where(s => Statuses.Pending != s)
    .Take(10);

如果您只需要一个值，但要确保它不是 Statuses.Pending ，则可以执行以下操作:

If you only need a single value, but want to be sure that it's not Statuses.Pending, you can do this:

var status = fixture
    .Create<Generator<Statuses>>()
    .Where(s => Statuses.Pending != s)
    .First();

也有其他方法，但这是即席查询最简单的方法.

There are other ways, too, but this is the easiest for an ad-hoc query.

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