Assertions (XCTAssertEqual, XCTAssertTrue) in Swift - Mini Project: Build & Apply

Using Assertions with XCTAssertEqual and XCTAssertTrue in Swift

📖 Scenario: You are writing simple tests for a calculator app. You want to check if your calculator functions give the correct answers.

🎯 Goal: Build a small Swift test case using XCTAssertEqual and XCTAssertTrue to verify calculator results.

📋 What You'll Learn

Create variables with exact values

Use XCTAssertEqual to check if two values are equal

Use XCTAssertTrue to check if a condition is true

Print a success message if tests pass

💡 Why This Matters

🌍 Real World

Assertions help developers check if their code works correctly by automatically verifying expected results.

💼 Career

Knowing how to write assertions is important for software testing roles and ensures code quality in professional projects.

1

Create variables for calculator results

Create two variables called sumResult and isPositive. Set sumResult to the sum of 5 and 3, and set isPositive to true.

Swift

# Create variables sumResult and isPositive with the specified values
# Your code here

Need a hint?

Use let to create constants. For sumResult, add 5 and 3. For isPositive, just assign true.

2

Write XCTAssertEqual to check sumResult

Write an XCTAssertEqual statement to check if sumResult equals 8.

Swift

let sumResult = 5 + 3
let isPositive = true

// Write XCTAssertEqual to check sumResult equals 8
# Your code here

Need a hint?

Use XCTAssertEqual(value1, value2) to check if two values are equal.

3

Write XCTAssertTrue to check isPositive

Write an XCTAssertTrue statement to check if isPositive is true.

Swift

let sumResult = 5 + 3
let isPositive = true

XCTAssertEqual(sumResult, 8)

// Write XCTAssertTrue to check isPositive is true
# Your code here

Need a hint?

Use XCTAssertTrue(condition) to check if a condition is true.

4

Print success message

Write a print statement to display the text "All tests passed!".

Swift

let sumResult = 5 + 3
let isPositive = true

XCTAssertEqual(sumResult, 8)
XCTAssertTrue(isPositive)

// Print success message
# Your code here

Need a hint?

Use print("All tests passed!") to show the message.