A simple tool to test if a given graphql schema is backward compatible with another schema.

Backward Compatibility Rules

This tool determines backward compatibility on following rules. If any of the below is true, the tool will return false and print out the missing fields. Check usage below to see the output format of the tool.

• There is a type missing.
• There is a field missing.
• Type of a field is changed.
• A query does not exist any more.
• Signature of the query is changed.

Usage

Future work

Create a maven plugin out of it.