How to Write a Simple Unit Test

Steps

1. Paste the code into a Swift file or playground.
2. Run it once to verify the output.
3. Adjust the inputs to match your use case.

Copy and paste

import XCTest

final class MathTests: XCTestCase {
    func testAdd() {
        XCTAssertEqual(2 + 2, 4)
    }
}

Notes

• Keep functions small and focused for reuse.
• Prefer safe APIs like optionals and guards.