Testing with Xcode.

• Quick Start. Beginning with Xcode 5 and the introduction of the XCTest framework, the process of configuring projects for testing has been streamlined and automated with the test navigator to ease bringing tests up and running.
• Performance Measurement. Xcode 6 and later includes the ability to create tests that allow you to measure and track performance changes against a baseline.
• UI Testing. Xcode 7 adds capabilities for writing tests that exercise an app’s UI. It includes the ability to record UI interactions into source code that you can transform into tests.
• Continuous Integration and Xcode Server. Xcode tests can be executed using command-line scripts or configured to be executed by bots on a Mac running Xcode Server automatically.
• Modernization. Xcode includes a migrator for converting projects that have OCUnit tests to have XCTest tests. 

See Also

UI Testing in Xcode 7 (406) 

Continuous Integration and Code Coverage in Xcode 7 (410)