FluentAssertions 排除重复配置

Question

我有这样的单元测试代码：

// version3 should be a copy of version2 with some differences
version3.Data.ShouldBeEquivalentTo(version2,
  option => option
    .Excluding(x => x.Id)
    .Excluding(x => x.Status)
    .Excluding(x => x.Stale)
    .Excluding(x => x.Body)
    .Excluding(x => x.CreatedBy)
    .Excluding(x => x.UpdatedBy),
  "because version3 is version2 updated");

然后再

// version4 should be a copy of version3 with some differences
version4.Data.ShouldBeEquivalentTo(version3,
  option => option
    .Excluding(x => x.Id)
    .Excluding(x => x.Status)
    .Excluding(x => x.Stale)
    .Excluding(x => x.Body)
    .Excluding(x => x.CreatedBy)
    .Excluding(x => x.UpdatedBy),
  "because version4 is version3 updated");

如何分解 option？

我想做这样的东西：

// version3 should be a copy of version2 with some differences
version3.Data.ShouldBeEquivalentTo(version2,
  option => baseOption,
  "because version3 is version2 updated");

甚至可能是这样：

// version3 should be a copy of version2 with some differences
version3.Data.ShouldBeEquivalentTo(version2,
  option => baseOption
    .Excluding(x => x.OtherProperty),
  "because version3 is version2 updated");

Answer 1

在外部声明选项委托为基础

Func<FluentAssertions.Equivalency.EquivalencyAssertionOptions<MyDataType>,
    FluentAssertions.Equivalency.EquivalencyAssertionOptions<MyDataType>>
    baseOption = option => option
        .Excluding(x => x.Id)
        .Excluding(x => x.Status);

并将其与断言一起使用

// version3 should be a copy of version2 with some differences
version3.Data.ShouldBeEquivalentTo(version2, baseOption, 
    "because version3 is version2 updated");

对于需要在基础上构建的其他断言，您必须调用委托并附加其他选项

// version3 should be a copy of version2 with some differences
version3.Data.ShouldBeEquivalentTo(version2,
  option => baseOption(option)
    .Excluding(x => x.OtherProperty),
  "because version3 is version2 updated");

您应该注意到，当前使用的语法在较新版本的框架中已被弃用。

version3.Should().BeEquivalentTo(version2, baseOption, 
    "because version3 is version2 updated");

Answer 2

或者切换到 v5，这样你就可以将你的被测对象与匿名类型进行比较，在匿名类型中你只定义你关心的特定测试的属性。

FluentAssertions 排除重复配置

FluentAssertions factor out repeated config

c#

unit-testing

fluent-assertions