XCTest framework in iOS Swift - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the XCTest framework used for in iOS development?

XCTest is used to write and run tests that check if your iOS app works correctly. It helps find bugs early by testing code automatically.

beginner

How do you define a test case class in XCTest?

You create a class that inherits from XCTestCase. Inside, you write test methods that start with the word 'test'.

intermediate

What is the purpose of the setUp() and tearDown() methods in XCTest?

setUp() runs before each test to prepare the environment. tearDown() runs after each test to clean up. They help keep tests independent.

beginner

How do you check if two values are equal in an XCTest test method?

Use XCTAssertEqual(value1, value2) to verify that both values are the same. If not, the test fails.

beginner

What happens when an assertion like XCTAssertTrue fails during a test?

The test is marked as failed but continues running. This shows that the code did not behave as expected.

Which class should your test classes inherit from when using XCTest?

A NSObject

B UIViewController

C XCTestCase

D AppDelegate

Test classes must inherit from XCTestCase to use XCTest features.

What prefix must test method names start with in XCTest?

A test

B verify

C run

D check

Test methods must start with 'test' so XCTest can find and run them.

What is the role of the tearDown() method in XCTest?

A Prepare test data before each test

B Clean up after each test

C Run all tests automatically

D Define test cases

tearDown() cleans up resources after each test to avoid side effects.

Which assertion checks if a condition is true in XCTest?

A XCTAssertTrue

B XCTAssertEqual

C XCTAssertFalse

D XCTFail

XCTAssertTrue checks if a condition is true; if not, the test fails.

What happens if an assertion fails during a test?

A Test is marked as failed and stops

B Test is marked as passed

C Test is skipped

D Test continues running

When an assertion fails, the test is marked as failed but continues running.

Explain how to create and run a simple test case using XCTest in Swift.

Think about the class, method names, and how you check results.

Describe the purpose of setUp() and tearDown() methods in XCTest and why they are important.

Consider how tests stay independent and clean.