Description

Properties are merely functions in disguise, and it would be useful to be able to assert on exceptions that they might throw, for example that accessing a property of a disposed object throws an ObjectDisposedException.

This doesn't work today because a simple lambda that accesses a property is compiled as a Func<TInput, TResult>, but there is no corresponding overload that can accept this delegate type.

Complete minimal example reproducing the issue

class MyDisposable : IDisposable
{
  // the usual Disposable implementation elided here

  bool IsConnected
  {
    get
    {
      if (disposed) throw new ObjectDisposedException(GetType().Name);
      return _isConnected;
    }
  }
}

// Arrange
var subject = new MyDisposable();

// Act
subject.Dispose();

// Assert
subject.Invoking(it => it.IsConnected).Should().Throw<ObjectDisposedException>();

Expected behavior:

I would expect this to invoke the lambda, and verify that the specified exception was thrown.

Actual behavior:

Compilation failure.

Versions

Using FluentAssertions 5.4.1, running on .NET Core 2.0