code to scroll to an element

scroll.swift

// Copied from https://stackoverflow.com/a/49944637

import XCTest

enum TestSwipeDirections {
    case up
    case down
    case left
    case right
}

fileprivate let min = 0.05
fileprivate let mid = 0.5
fileprivate let max = 0.95

fileprivate let leftPoint = CGVector(dx: min, dy: mid)
fileprivate let rightPoint = CGVector(dx: max, dy: mid)
fileprivate let topPoint = CGVector(dx: mid, dy: min)
fileprivate let bottomPoint = CGVector(dx: mid, dy: max)

extension TestSwipeDirections {
    var vector: (begin: CGVector, end: CGVector) {
        switch self {
        case .up:
            return (begin: bottomPoint,
                    end:   topPoint)
        case .down:
            return (begin: topPoint,
                    end:   bottomPoint)
        case .left:
            return (begin: rightPoint,
                    end:   leftPoint)
        case .right:
            return (begin: leftPoint,
                    end:   rightPoint)
        }
    }
}

extension XCUIElement {
    @discardableResult func swipeOnIt(_ direction: TestSwipeDirections,
                                      swipeLimit: Int = 6,
                                      swipeDuration: TimeInterval = 1.0,
                                      until: () -> Bool) -> Bool {
        XCTAssert(exists)

        let begining = coordinate(withNormalizedOffset: direction.vector.begin)
        let ending = coordinate(withNormalizedOffset: direction.vector.end)

        var swipesRemaining = swipeLimit
        while !until() && swipesRemaining > 0 {
            begining.press(forDuration: swipeDuration, thenDragTo: ending)
            swipesRemaining = swipesRemaining - 1
        }
        return !until()
    }

    @discardableResult func swipeOnIt(_ direction: TestSwipeDirections,
                                      swipeLimit: Int = 6,
                                      swipeDuration: TimeInterval = 1.0,
                                      untilHittable element: XCUIElement) -> Bool {
        return swipeOnIt(direction, swipeLimit: swipeLimit, swipeDuration: swipeDuration, until: { element.isHittable })
    }

    @discardableResult func swipeOnIt(_ direction: TestSwipeDirections,
                                      swipeLimit: Int = 6,
                                      swipeDuration: TimeInterval = 1.0,
                                      untilExists element: XCUIElement) -> Bool {
        return swipeOnIt(direction, swipeLimit: swipeLimit, swipeDuration: swipeDuration) { element.exists }
    }
}

Tested on swift 4.2, XCode 10 and iOS 12.

Hi,
Nice work writing this method! I curious to know how to do call it in a testFuncition for swiping up a view that has a XCUIElement called application.table.staticText["Today"]
Thanks,
Eric