.OCTEST File Extension

Developer file created by Xcode, a Mac OS X and iOS application development IDE; saves a bundle of unit tests, which are small, localized tests used for verifying the behavior of individual functions within the overall application source code; enables all test files to be packaged together.

Tests within an OCTEST bundle may be one of two types:

1. Logic tests that run in an isolated environment testing outside of the running application.
2. Application tests that execute within the running application. These are often used for user interface testing.