Timber JUnit Rule

This library provides a JUnit TestRule that plants a temporary Timber tree that pipes any logs sent via Timber to the standard System.out. Once a unit test has completed, the Timber tree is removed to avoid logging unintended test cases.

The rule is extremely useful for Android JUnit tests, as the Timber logs do not show without planting a tree.

There are many ways to modify the output using the following behaviours:

• The minimum log level to output.
• Whether thread ids are shown.
• Whether timestamps are shown.
• Whether to always log, or only log when a unit test fails.

from The Android Arsenal