Replicate pull to refresh in XCTest UI testing

Question

I am trying to replicate a pull to refresh on a UITableView using the new Xcode UI testing framework in Xcode 7 (beta 3)

My current approach is dragging from the table to whatever element below the table I can find. This works when there is a fixed item below the table like a UIToolbar or UITabBar I would rather not rely on having a UITabBar or UIToolbar but I can't figure out a way to do the pull to refresh/drag action without using the method in XCUIElement.

func pressForDuration(duration: NSTimeInterval, thenDragToElement otherElement: XCUIElement)

But it fails when I don't have a toolbar/tabbar and try to drag using the cells

This is the relevant portion of my code:

func testRefresh() {
    //For testing cell
    for _ in 0...9 {
        addCell()
    }
    refreshTable()
}

func refreshTable(var tbl: XCUIElement? = nil) {
    let app = XCUIApplication()

    if tbl == nil {
        let tables = app.tables
        if tables.count > 0 {
            tbl = tables.elementAtIndex(0)
        }
    }

    guard let table = tbl else {
        XCTFail("Cannot find a table to refresh, you can provide on explicitly if you do have a table")
        return
    }

    var topElement = table
    let bottomElement: XCUIElement?

    //Try to drag to a tab bar then to a toolbar then to the last cell
    if app.tabBars.count > 0 {
        bottomElement = app.tabBars.elementAtIndex(0)
    }
    else if app.toolbars.count > 0 {
        bottomElement = app.toolbars.elementAtIndex(0)
    }
    else {
        let cells = app.cells
        if cells.count > 0 {
            topElement = cells.elementAtIndex(0)
            bottomElement = cells.elementAtIndex(cells.count - 1)
        }
        else {
            bottomElement = nil
        }
    }
    if let dragTo = bottomElement {
        topElement.pressForDuration(0.1, thenDragToElement: dragTo)
    }
}

func addCell() {
    let app = XCUIApplication()
    app.navigationBars["Master"].buttons["Add"].tap()
}

Additional failed attempts:

• swipeDown() (multiples times as well)
• scrollByDeltaX/deltaY (OS X only)

Answer 1

You can use the XCUICoordinate API to interact with specific points on the screen, not necessarily tied to any particular element.

1. Grab a reference to the first cell in your table. Then create a coordinate with zero offset, CGVectorMake(0, 0). This will normalize a point right on top of the first cell.
2. Create an imaginary coordinate farther down the screen. (I've found that a dy of six is the smallest amount needed to trigger the pull-to-refresh gesture.)
3. Execute the gesture by grabbing the first coordinate and dragging it to the second one.

let firstCell = app.staticTexts["Adrienne"]
let start = firstCell.coordinateWithNormalizedOffset(CGVectorMake(0, 0))
let finish = firstCell.coordinateWithNormalizedOffset(CGVectorMake(0, 6))
start.pressForDuration(0, thenDragToCoordinate: finish)

More information along with a working sample app is also available.