FluentAssertions，确保IEnumerable仅包含单个元素 [英] FluentAssertions, making sure IEnumerable contains only single element

问题描述

我正在编写单元测试，并且看起来像这样:

I am writing unit tests and I have something that looks like this:

[Fact]
public void GetFoos_only_gets_foo1()
{
    _foo1.included = true; //Foo object
    _foo2.included = false; //Foo object
    _sut.GetFoos().Should().OnlyContain(_foo1); // this doesn't work, is there a specific syntax to use?
}

然后GetFoos()返回并IEnumberable<Foo>

推荐答案

OnlyContain需要一个谓词-

OnlyContain expects a predicate -

 GetFoos().Should().OnlyContain(x => _foo1.Equals(x));

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