Nested assertions

[vbreuss]

Fluentassertions has some quite common usages of nested assertions, e.g.:

	[Fact]
	public async Task ShouldApplyCodeFixInNestedExceptionWithMessageCheck() => await Verifier
		.VerifyCodeFixAsync(
			"""
			using System;
			using aweXpect;
			using FluentAssertions;
			using Xunit;

			public class MyClass
			{
			    [Fact]
			    public void MyTest()
			    {
			        Action subject = () => {};
			        
			        [|subject.Should().Throw<NullReferenceException>()
			            .WithMessage("foo*")|];
			    }
			}
			""",
			"""
			using System;
			using aweXpect;
			using FluentAssertions;
			using Xunit;

			public class MyClass
			{
			    [Fact)]
			    public void MyTest()
			    {
			        Action subject = () => {};
			        
			        Expect.That(subject).Throws<NullReferenceException>().WithMessage("foo*").AsWildcard();
			    }
			}
			"""
		);