I’m happy to keep helping you, but there are some Elixir basics here you seem to be struggling with that are making this a lot harder than it needs to be. Look carefully at the error message. Look at the exact data types between what you have what you are asserting on the left, and what the value of result is on the right. In particular, pay attention to what values are strings and what values are atoms.

Based on the content of your error messages, it looks like you’re working through the Absinthe book. This is a great way to learn absinthe. However, since you’re very new to this, I don’t think it’s a good idea to try to BOTH work through a new book AND utilize a testing library that isn’t used in the book. There are subtle but important differences between how wormwood tests work and how regular ExUnit test work, and those differences will only increase as you go further into the book and start handling things like authentication headers. I would ditch wormwood for now, and revisit it later after you have a solid grasp of how Absinthe and Elixir testing works.

Why should that return an error? 0 results isn’t an error. Additionally, a graphql query will only return an error if there is a syntax / validation issue with the query itself, or if you return an error from the resolver. If you aren’t doing that, it won’t error.

You didn’t pass in the same value. You passed in "123" (a string), but the wormwood example uses 123 (an integer).

FYI this line doesn’t do anything. You’re just binding a value to a variable, which cannot fail.

This is a good idea for production, but not a good idea when at the “learn from a book” stage. You always should use the exact versions specified in the book unless you are sufficiently familiar with the subject matter to make the necessary changes.

In this specific case, the change is extremely minor, so it’s up to you. If you want to use latest you can, but you’ll want to do json_response(response, 200) instead of json_response(response, 400). My recommendation is to stick to the book versions while learning from the book. There are very few things different between the book version and the latest Absinthe version, but there are enough that it can confuse beginners. Go through the book till you have some comfort with it, then do your new project on the latest version.