Swiftmessages: Wait for MessageView to appear in UI Test

[alper]

Does anybody have a working example of waiting for a MessageView to appear and validating its content in a UI Test?

I'm now waiting for the string to show up in app.staticTexts but that is not working.

[wtmoose]

Can you post your test function?

[alper]

I have:

  func testLogin_Failed() {
    launchApp(.stub(.loginFailed))

    playLogin("meh", password: "no")

//    let expected = localizedString("Login.EnteredEmailOrPasswordWasWrong")
    let expected = "Please try again."

    XCTAssert(waitForElementToAppear(app.staticTexts[expected]))
  }

and

  func waitForElementToAppear(_ element: XCUIElement) -> Bool {
    let predicate = NSPredicate(format: "exists == true")
    let exp = expectation(for: predicate, evaluatedWith: element, handler: nil)

    let result = XCTWaiter().wait(for: [exp], timeout: 10.0)
    return result == .completed
  }

[wtmoose]

I haven't had time to look at this and I'm not a UI testing expert. You might have better luck on StackOverflow

[ferranabello]

Hi @alper,
I could solve it by doing something like this:

let element = app.otherElements[expected].waitForExistence(timeout: 5)

Cheers.

[alper]

For some reason the string in otherElements has the prefix [Title], so I changed it to:

let expected = "Username or password not valid. Please try again."
let predicate = NSPredicate(format: "label CONTAINS[c] %@", expected)
XCTAssert(waitForElementToAppear(app.otherElements.containing(predicate).firstMatch))

and that seems to work.

[MartyCatawiki]

Unfortunately waitForElementToAppear is too slow for SwifMessages that automatically disappear after 1 second.
Does anybody know how to solve this for UI testing?