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XCTest

XCTest is a framework provided by Apple for writing and executing unit tests, performance tests, and UI tests for Xcode projects. It is an integral part of the development process for iOS, macOS, watchOS, and tvOS applications.

Features and Functionalities:
• Unit Testing: Allows developers to test individual code units like functions and methods.
• Performance Testing: Measures the performance of code blocks and checks for regressions.
• UI Testing: Automates user interaction with the app’s interface.
• Integration with Xcode: Seamlessly integrates with Xcode’s testing workflow.
• Test Assertions: Includes a variety of assertions to verify different conditions within test cases.
• Asynchronous Testing: Supports testing of asynchronous operations to ensure they complete as expected.
• Code Coverage: Provides metrics on how much of the code is covered by tests, helping to identify untested areas.

Use Cases in Software Testing and Quality Assurance:
• Regression Testing: Ensures that new changes do not break existing functionality.
• Continuous Integration: Can be integrated into CI pipelines for automated testing.
• Refactoring: Gives confidence that code changes do not affect existing behavior.
• Documentation: Serves as living documentation, showing what’s expected from the software.
• Debugging: Helps in identifying bugs and issues early in the development process.

XCTest is a powerful tool for maintaining code integrity, enhancing app quality, and ensuring that iOS applications behave as expected through rigorous testing practices.

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