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?
}
And GetFoos()
returns and IEnumberable<Foo>
OnlyContain expects a predicate -
GetFoos().Should().OnlyContain(x => _foo1.Equals(x));
Try this page as see if it helps. https://github.com/dennisdoomen/fluentassertions/wiki
collection.Should().ContainSingle();
collection.Should().ContainSingle(x => x > 3);
collection.Should().Contain(8).And.HaveElementAt(2, 5).And.NotBeSubsetOf(new[] {11, 56});
collection.Should().Contain(x => x > 3);
collection.Should().Contain(collection, 5, 6); // It should contain the original items, plus 5 and 6.