Open Radar

 
1) Create a simple iOS app that displays a WKWebView and load html that draws an input box and a button, for example.
2) Create an XCUITest that attempts to type test in the text field and push the button
3) Run the test in simulator against the previous iOS release (e.g., 13.2.2) - test passes
4) Run the test in simulator against the latest iOS release (e.g., 13.3) - test fails

It appears by querying in the debugger via `po app` that UI elements that used to be visible to the XCTUITest are no longer visible.

I’ve attached a bare-bones example Xcode project to illustrate. I first noticed my tests failing upon updating Xcode to 11.3. When I run Xcode 11.2.1 which uses a simulator with the earlier version, the tests pass.

In the `po app` output, notice that the TextField and Button are visible in iOS 13.2.2, but not 13.3.

Here is `po app` output in 11.2.2:
(lldb) po app
    t =    16.33s Requesting snapshot of accessibility hierarchy for app with pid 52998
    t =    16.70s Requesting snapshot of accessibility hierarchy for app with pid 52998
Attributes: Application, pid: 52998, label: 'WebViewElementsRegression'
Element subtree:
 →Application, 0x600000386920, pid: 52998, label: 'WebViewElementsRegression'
    Window (Main), 0x600000386840, {{0.0, 0.0}, {414.0, 896.0}}
      Other, 0x600000386760, {{0.0, 0.0}, {414.0, 896.0}}
        Other, 0x600000386680, {{0.0, 0.0}, {414.0, 896.0}}
          Other, 0x6000003865a0, {{0.0, 0.0}, {414.0, 896.0}}
            WebView, 0x6000003864c0, {{0.0, 0.0}, {414.0, 896.0}}
              WebView, 0x6000003863e0, {{0.0, 0.0}, {414.0, 896.0}}
                WebView, 0x600000386300, {{0.0, 0.0}, {414.0, 896.0}}
                  RemotePlaceholder, 0x600000386220, pid: 52998, {{0.0, 0.0}, {414.0, 896.0}}
                    Other, 0x600000386140, {{0.0, 0.0}, {414.0, 896.0}}
                      Other, 0x60000039c1c0, {{0.0, 44.0}, {175.0, 379.0}}
                        Other, 0x6000003880e0, {{0.0, 44.0}, {415.0, 818.0}}
                          Other, 0x6000003881c0, {{122.0, 44.0}, {170.0, 9.0}}
                            StaticText, 0x600000394380, {{173.0, 44.0}, {68.0, 9.0}}, label: 'Web View Step Example', value: Web View Step Exam...
                          Other, 0x6000003882a0, {{122.0, 52.0}, {170.0, 55.0}}
                            TextField, 0x600000388380, {{122.0, 56.0}, {170.0, 19.0}}, value: 
                            Button, 0x600000386060, {{177.0, 87.0}, {60.0, 19.0}}, label: 'Continue'
                Other, 0x600000385f80, {{381.0, 34.5}, {30.0, 826.5}}, label: 'Vertical scroll bar, 1 page', value: 0%
                Other, 0x600000385ea0, {{35.0, 863.0}, {344.0, 30.0}}, label: 'Horizontal scroll bar, 1 page', value: 0%
    Window, 0x600000385dc0, {{0.0, 0.0}, {414.0, 896.0}}
      Other, 0x600000385ce0, {{0.0, 0.0}, {414.0, 896.0}}
        Other, 0x600000385c00, {{0.0, 0.0}, {414.0, 896.0}}
Path to element:
 →Application, 0x600000386920, pid: 52998, label: 'WebViewElementsRegression'
Query chain:
 →Find: Target Application 'com.careevolution.WebViewElementsRegression'
  Output: {
    Application, pid: 52998, label: 'WebViewElementsRegression'
  }

Here is `po app` output in 11.3:
(lldb) po app
    t =     7.80s Requesting snapshot of accessibility hierarchy for app with pid 53270
    t =    12.84s Requesting snapshot of accessibility hierarchy for app with pid 53270
Attributes: Application, pid: 53270, label: 'WebViewElementsRegression'
Element subtree:
 →Application, 0x6000016e87e0, pid: 53270, label: 'WebViewElementsRegression'
    Window (Main), 0x6000016e8700, {{0.0, 0.0}, {414.0, 896.0}}
      Other, 0x6000016e8620, {{0.0, 0.0}, {414.0, 896.0}}
        Other, 0x6000016e8380, {{0.0, 0.0}, {414.0, 896.0}}
          Other, 0x6000016ebd40, {{0.0, 0.0}, {414.0, 896.0}}
            WebView, 0x6000016ebc60, {{0.0, 0.0}, {414.0, 896.0}}
              WebView, 0x6000016ebb80, {{0.0, 0.0}, {414.0, 896.0}}
                WebView, 0x6000016ebaa0, {{0.0, 0.0}, {414.0, 896.0}}
                Other, 0x6000016eb9c0, {{381.0, 34.5}, {30.0, 826.5}}, label: 'Vertical scroll bar, 1 page', value: 0%
                Other, 0x6000016eb8e0, {{35.0, 863.0}, {344.0, 30.0}}, label: 'Horizontal scroll bar, 1 page', value: 0%
    Window, 0x6000016eb800, {{0.0, 0.0}, {414.0, 896.0}}
      Other, 0x6000016eb720, {{0.0, 0.0}, {414.0, 896.0}}
        Other, 0x6000016eb640, {{0.0, 0.0}, {414.0, 896.0}}
Path to element:
 →Application, 0x6000016e87e0, pid: 53270, label: 'WebViewElementsRegression'
Query chain:
 →Find: Target Application 'com.careevolution.WebViewElementsRegression'
  Output: {
    Application, pid: 53270, label: 'WebViewElementsRegression'
  }