asciidoctor-maven-plugin | Maven plugin that uses Asciidoctor via JRuby | Plugin library

I am studying Spring Boot and I want to create a Rest Controller, and using a sql database, but there is a problem when I start the project :

Error: (the error text is great I will leave the link)

And code:

OrderController.java

I'm trying to track down how some Java Spring-boot API was generated by a developer who has since left the company. The document looks like this:

We have swagger, but this doesn't look like anything generated from that. Definitely doesn't look like javadoc. Any ideas?

Thanks to the answer by João Dias, I found this in pom.xml:

I have created a Spring Boot 2.2.6 application through Spring Initilizr which includes JUnit 5.6. I'm using the generated pom.xml along with some additional dependencies and Intellij IDEA 2020.1 as my IDE.

I have created a very simple test just to see if tests work:

I'm working on enhancing the API documentation of a Spring Boot project using rest-docs, rest assured and asciidoctor.

I'm writing integration tests to generate the snippets for each API endpoint, write the .adoc file that references all the snippets , process the .adoc file with asciidoctor-maven-plugin and transform it to a HTML file during the build, then copy the HTML file inside the jar to be served as a static content when the application is running. Everything started to work fine in the beginning, until the size of the HTML started increasing. when I started documenting more APIs, the html page that used to be accessible from this URL http://localhost:8080/docs/api-docs.html is now a blank page.

but when I access the page by opening the file in /target/generated-docs/api-docs.html, it works fine on the browser, which means there's a problem with the jar serving the HTML file.

The console output when trying to access this url http://localhost:8080/docs/api-docs.html