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How to stabilize UI tests using XCTest

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Avatar for Akio Itaya Akio Itaya
March 10, 2026
Programming
250
0

How to stabilize UI tests using XCTest

Ebisu.mobile #13 〜STORESのモバイルテストの現在地〜
https://hey.connpass.com/event/382942/

Avatar for Akio Itaya

Akio Itaya

March 10, 2026

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Transcript

  1. XCTestΛ࢖ͬͨUIςετͷ҆ఆԽઓུ akkey / @AkkeyLab Ebisu.mobile #13

  2. The Point 2 Wait & Scroll ࣮ߦ؀ڥͱίϯςϯπʹґଘ͠ͳ͍ςετΛ໨ࢦͯ͠

  3. Wait

  4. Wait 4 let app = XCUIApplication() let button = app.buttons.firstMatch

    button.tap()

  5. Wait 5 let app = XCUIApplication() let button = app.buttons.firstMatch

    button.tap() ❌

  6. Wait 6 let app = XCUIApplication() let button = app.buttons.firstMatch

    button.tap() ❌ ❌

  7. Wait 7 let app = XCUIApplication() let button = app.buttons.firstMatch

    button.tap() ✅

  8. Fix

  9. Wait 9 let app = XCUIApplication() let button = app.buttons.firstMatch

    let predicate = NSPredicate( format: "exists == true && hittable == true" ) let ex = XCTNSPredicateExpectation( predicate: predicate, object: button ) XCTWaiter.wait( for: [ex], timeout: 10 ) button.tap() ⏰ wait…

  10. Wait 10 let app = XCUIApplication() let button = app.buttons.firstMatch

    let predicate = NSPredicate( format: "exists == true && hittable == true" ) let ex = XCTNSPredicateExpectation( predicate: predicate, object: button ) XCTWaiter.wait( for: [ex], timeout: 10 ) button.tap() ⏰ wait…

  11. Wait 11 let app = XCUIApplication() let button = app.buttons.firstMatch

    let predicate = NSPredicate( format: "exists == true && hittable == true" ) let ex = XCTNSPredicateExpectation( predicate: predicate, object: button ) XCTWaiter.wait( for: [ex], timeout: 10 ) button.tap() ✅ completed! ✅

  12. Wait 12 let predicate = NSPredicate { object, _ in

    guard let element = object as? XCUIElement else { return false } return element.exists && element.isHittable } let ex = XCTNSPredicateExpectation( predicate: predicate, object: button ) XCTWaiter.wait( for: [ex], timeout: 10 ) button.tap() ✅ completed! ✅

  13. Scroll

  14. Scroll 14

  15. Scroll 15

  16. Scroll 16

  17. Scroll 17 scrollView.swipeLeft(velocity: .slow)

  18. Scroll 18 scrollView.swipeLeft(velocity: .slow) ⚠

  19. Fix

  20. let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)) let end

    = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) Scroll 20 ☝

  21. Scroll 21 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ☝

  22. Scroll 22 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) ☝ 350 -350

  23. Scroll 23 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ☝

  24. Scroll 24 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ☝ ⏰0.02s

  25. Scroll 25 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ☝

  26. Scroll 26 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ☝ 🚀250px/s -350

  27. Scroll 27 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ☝ ⏰0.07s

  28. Scroll 28 let start = scrollView.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5))

    let end = start.withOffset(CGVector(dx: -350, dy: 0)) start.press( forDuration: 0.02, thenDragTo: end, withVelocity: 250, thenHoldForDuration: 0.07 ) 350 ⏰0.07s ☝

  29. The Point 29 Wait & Scroll ࣮ߦ؀ڥͱίϯςϯπʹґଘ͠ͳ͍ςετΛ໨ࢦͯ͠

  30. Thank you !!