Autofixture：随机填充类的属性答案

【问题标题】：Autofixture: Randomly fill property of a classAutofixture：随机填充类的属性
【发布时间】：2022-01-01 07:49:16
【问题描述】：

关于以下课程：

public partial class ByValueCondition 
{       
    public ParameterCondition ParameterCondition { get; set; }
    
    public TimeOfDayCondition TimeOfDayCondition { get; set; }
    
    public SimulationTimeCondition SimulationTimeCondition { get; set; }
    
    public StoryboardElementStateCondition StoryboardElementStateCondition { get; set; }
    
    public UserDefinedValueCondition UserDefinedValueCondition { get; set; }
    
    public TrafficSignalCondition TrafficSignalCondition { get; set; }
    
    public TrafficSignalControllerCondition TrafficSignalControllerCondition { get; set; }
}

我想要在 autofixture 中进行自定义，它只会随机选择一个属性并填充它，而将其他属性留空。底层类的配置仍应由夹具的全局自定义定义。

还应该可以创建 ByValueCondition 的集合。

我对此进行了尝试，但除了从头开始创建 ISpecimenbuilder 之外，找不到简单的解决方案。

【问题讨论】：

标签： c# autofixture

【解决方案1】：

我会亲自使用以下架构：

// Interface implemented by all Conditions
public interface ICondition
{
    bool IsConditionTrue(object ObjectThatWeKnow);
}

// Your object 
public partial class ByValueCondition 
{       
    public ICondition Condition { get; set; }
}

// And here you define all types of conditions
public class ParameterCondition : ICondition
{
    public object Parameter { get; set; }

    public bool IsConditionTrue(object ObjectThatWeKnow)
    {
        return ObjectThatWeKnow.Equals(Parameter);
    }
}

public class TimeOfDayCondition : ICondition
{
    public bool IsConditionTrue(object ObjectThatWeKnow) { return true; }
}

public class SimulationTimeCondition : ICondition
{
    public bool IsConditionTrue(object ObjectThatWeKnow) { return true; }
}

你可以这样做的随机性：

var conditions = new List<ICondition>()
{
    new ParameterCondition() { Parameter = "whatever" },
    new ParameterCondition() { Parameter = "otherString" },
    new ParameterCondition() { Parameter = "NextOne" },

    new TimeOfDayCondition() { TimeBefore = DateTime.Now },
    new TimeOfDayCondition() { TimeAfter = DateTime.Now.AddDays(-1) },
}

var rand = new Random();
var randomN = rand.Next(0, conditions.Count);

var byValueCondition = new ByValueCondition();
byValueCondition.Condition = conditions[randomN]; //Here you assign random value

【讨论】：