忽略 ShouldBeEquivalentTo 中的内部属性

Question

有没有办法在执行 ShouldBeEquivalentTo 时忽略 class 的内部属性？

例如，在下面的 class 中，我想从对象图比较中排除元数据属性。

public class SomeObject 
{
    Public string SomeString { get; set; }
    internal MetaData MetaData { get; set; }
}

我不想使用

someObject.ShouldBeEquivalentTo(someOtherObject, options =>     
    options.Excluding(info => info.SelectedMemberPath == "MetaData")

因为我可能有超过 1 个内部属性并且为所有这些属性设置它会很乏味。

Answer 1

FluentAssertions库中有IMemberSelectionRule接口：

Represents a rule that defines which members of the subject-under-test to include while comparing two objects for structural equality.

实现此接口允许一次排除所有内部属性（其中 IsAssembly 属性是 true）：

  internal class AllExceptNonPublicPropertiesSelectionRule : IMemberSelectionRule
  {
    public bool IncludesMembers
    {
      get { return false; }
    }

    public IEnumerable<SelectedMemberInfo> SelectMembers(
      IEnumerable<SelectedMemberInfo> selectedMembers,
      ISubjectInfo context,
      IEquivalencyAssertionOptions config)
    {
      return selectedMembers.Except(
        config.GetSubjectType(context)
          .GetNonPrivateProperties()
          .Where(p => p.GetMethod.IsAssembly)
          .Select(SelectedMemberInfo.Create));
    }
  }

现在可以在单元测试中使用该规则：

  someObject.ShouldBeEquivalentTo(someOtherObject, options => options.Using(
    new AllExceptNonPublicPropertiesSelectionRule()));

忽略 ShouldBeEquivalentTo 中的内部属性

Ignore internal properties in ShouldBeEquivalentTo

c#

tdd

fluent-assertions

object-graph