Create Pattern Rules


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In this tutorial, you will learn how to create pattern rules. A pattern ruleset lets you catch a pattern of code and emits violations/errors.


You are going to write an analysis rule that

  1. Detects assert foo and replaces with assert bar
  2. Pass any check on a test file

To make a rule, we need to go through the following steps:

  1. Create a ruleset
  2. Create a rule
  3. Write the rule
  4. Add some tests

All the code in the rules is written in


This is a pattern rule for


Click next at the top for a walkthrough step by step.

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