XCUITest - Failed to find matching element

Question

In one of my view controllers, I have code like:

class ViewController: UIViewController {
    @IBOutlet weak var _tableView: UITableView!

    private lazy var searchBar: UISearchBar = {
        let searchBar:UISearchBar = UISearchBar()
        searchBar.isAccessibilityElement = true
        searchBar.accessibilityLabel = "SearchField"
        searchBar.placeholder = "Search..."
        searchBar.sizeToFit()
        searchBar.isTranslucent = false
        searchBar.autocapitalizationType = .none
        searchBar.returnKeyType = .done
        searchBar.delegate = self

        return searchBar
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        isAccessibilityElement = true
        accessibilityLabel = "ViewController"

        _tableView.isAccessibilityElement = true
        _tableView.accessibilityLabel = "ItemList"
        _tableView.tableHeaderView = searchBar
    }
}

Now whenever I try to record UI test and select the searchBar, I get the following error:

Timestamped Event Matching Error: Failed to find matching element

I tried debugging to get the searchBar and following code, but it didn't match any element and assertion fails.

    let searchField = app.tables["ItemList"].otherElements.element(boundBy: 0).otherElements["SearchField"]
    XCTAssertTrue(searchField.exists)

Can you please show me what I did wrong? How can I access and test the searchBar? Thanks in advance.

Why do you provide accessibility properties to UIViewController? It may decrease the accessibility of your app. — Roman Zakharov, Nov 19 '19 at 13:43
Because I need to test which view controller is presented at certain state. — x4h1d, Nov 20 '19 at 13:44

BuguiBu · Accepted Answer · 2019-11-20T08:34:44.237

2

You can use the Debug View Hierarchy or the XCode open developer tool Accesibility Inspector from bottom to top looking for the view that isn't accessibility enabled.

edited Nov 20 '19 at 08:34

answered Nov 19 '19 at 14:08

BuguiBu

1,507
1
13
18

2

That view was added from code, so **Debug View Hierarchy** is not an option is this case. But the good news is, I found the **SearchField** using Accesibility Inspector. And it is in tableView `otherElements`, not in `element(boundBy: 0).otherElementes`. Thanks. – x4h1d Nov 20 '19 at 14:03
I didn't know that code generated views doesn't appears, tricky one. – BuguiBu Nov 20 '19 at 17:27
My bad. Views from code does appear at debugging view hierarchy. I was just impatient to find out from the mess of layers. + 1 for the comment, for which I searched again. – x4h1d Nov 21 '19 at 14:40
No prob, at least you tried Accessibility Inspector that worth the try – BuguiBu Nov 22 '19 at 08:20

score 1 · Answer 2 · answered Nov 19 '19 at 13:41

The built-in recorder is bad, you should write test code yourself.
Find the element in VoiceOver hierarchy with print(app.debugDescription)
Your XCUIElementQuery is a little bit longer than it should be. Try to shorten it like app.otherElements["SearchField"]

XCUITest - Failed to find matching element

2 Answers2