Showcasing a possible bug with teavm.
Some collection methods, e.g. hashCode and contains, behave differntly between pure Java and TeaVM compiled
javascript. See unit tests and generated page for example.
To generate webpage run: mvn clean package then open target/teavm-set-bug-example-1.0-SNAPSHOT/index.html in a browser, result is:
All these methods in Java return true, see unit tests, but when compiled to javascript they don't have a equivalent behavior
Comparing HashSet<HashSet<String>>
* hashCode: false
* contains: false
* containsAll: false
Comparing HashSet<String>
* hashCode: false
* contains: true
* containsAll: true