Swift Quality Control & Assurance 2

Question 1

In Swift, which testing framework is natively included with Xcode for unit testing?

Accepted Answer

XCTest

Answer

XCTest is Apple's native testing framework bundled with Xcode for writing and running unit, performance, and UI tests in Swift.

Question 2

Which assertion in XCTest verifies that two values are NOT equal?

Accepted Answer

XCTAssertNotEqual

Answer

XCTAssertNotEqual checks that two given values are not equal, failing the test if they are.

Question 3

What does 'code coverage' measure in Swift quality assurance?

Accepted Answer

The percentage of source code lines executed during tests

Answer

Code coverage measures what percentage of your source code lines are actually executed when your test suite runs.

Question 4

In a Swift project, what is the purpose of a 'test target' separate from the main app target?

Accepted Answer

To isolate test code so it doesn't ship with production code

Answer

A separate test target keeps test code out of the production binary, ensuring tests only run in the development/CI environment.

Question 5

Which Swift quality practice involves writing tests BEFORE writing the implementation code?

Accepted Answer

Test-driven development (TDD)

Answer

Test-driven development (TDD) follows a red-green-refactor cycle where tests are written first to define expected behavior.

Swift Practice Test