iOS Development iOS Testing and Debugging

Question 1

What framework does Apple provide natively for unit testing in iOS apps?

Accepted Answer

XCTest

Answer

XCTest is Apple's built-in testing framework for writing unit, integration, and UI tests in iOS.

Question 2

Which method in XCTestCase is called before each individual test method runs?

Accepted Answer

setUp()

Answer

setUp() is called before each test method in XCTestCase to prepare a clean test environment.

Question 3

What does the XCTAssertEqual function verify in an XCTest unit test?

Accepted Answer

That two values are equal

Answer

XCTAssertEqual checks that two values are equal and fails the test if they differ.

Question 4

What is the primary purpose of a mock object in iOS unit testing?

Accepted Answer

To replace real dependencies with controlled test doubles

Answer

Mock objects replace real dependencies with controlled substitutes so the code under test can be verified in isolation.

Question 5

Which Xcode keyboard shortcut runs all unit and UI tests in the current scheme?

Accepted Answer

Cmd+U

Answer

Cmd+U triggers a full test run for all test targets in the active Xcode scheme.

iOS Development Practice Test