## Why is this an issue?

Assertions are intended to be used in test code, but not in production code. It is confusing, and might lead to `ClassNotFoundException` when the build tools only provide the required dependency in test scope.

In addition, assertions will throw a sub-class of `Error`: `AssertionError`, which should be avoided in production code.

This rule raises an issue when any assertion intended to be used in test is used in production code.

Supported frameworks:

- JUnit
- FestAssert
- AssertJ

Note: this does not apply for `assert` from Java itself or if the source code package name is related to tests (contains: `test` or `assert` or `junit`).