#3 XCTest vs. Swift Testing - Unwrapping optionals

Optionals are a core of Swift - we deal with them daily, both in production and testing code. Whether you write tests with XCTest or Swift Testing, unwrapping optionals is a common case.

In XCTest there is XCTUnwrap operator.

Swift Testing introduces #require macro.

Is there any difference between them? Not really! Both require the test function to handle exceptions and try keyword before.

Gif ⤵️

Example

Code ⤵️

XCTest

func testNewYorkTimeZone() throws {
    let newYorkTimeZone = try XCTUnwrap(
        TimeZone(identifier: "America/New_York")
    )
    XCTAssertEqual(newYorkTimeZone.abbreviation(), "GMT-5")
    XCTAssertEqual(newYorkTimeZone.identifier, "America/New_York")
}

Swift Testing

@Test
func newYorkTimeZone() throws {
    let newYorkTimeZone = try #require(
        TimeZone(identifier: "America/New_York")
    )
    #expect(newYorkTimeZone.abbreviation() == "GMT-5")
    #expect(newYorkTimeZone.identifier == "America/New_York")
}

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