In the talk, "The Power of Toys | David Nolen | Lambda Days 2022", David Nolen discusses how toy models can be used to verify the correctness of software code. He explains how property-based testing can be used to generate interesting commands for stateful systems, and how these commands can be shrunk down to a two-step sequence in order to verify their validity. The talk provides examples of how toy models can be used to represent a user's organization, a mobile device, and an asset.
The speaker discusses how atomic databases can be used for event sourcing, and how they can help to remove dead code. He also mentions the importance of coverage in order to ensure that all code is executed.