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iosxcode7xcode-ui-testing

iOS UI Test: how to get message of UIAlertController

My app has a login screen. If the user presses the login button without entering any text in either the username or password fields, the app will display a UIAlertController with an error message.

I am trying to model this logic in UI Tests, and want to assert that the UIAlertController is displaying the correct message. However, I can't find a way for the UI Test to access the message property of the alert. Here is the code generated by the test recorder:

func testLoginWithoutPasswort() {
    let app = XCUIApplication()
    let emailTextField = app.textFields["email"]
    emailTextField.tap()
    emailTextField.typeText("[email protected]")
    app.buttons["Login"].tap()
    app.alerts["Error"].collectionViews.buttons["OK"].tap()
}

Is there any way I can extract the String value of the alert's message, so I can put an assertion on it?

Solution

  • You can't directly test the alert's message. You can, however, test if the alert contains your error message's copy (at all).

    For example, say your alert looks like this:

    Alert titled "You won!" with a message "Final Score: 27-25".

    To assert that the alert contains the "Final Score" message, use:

    XCTAssert(app.alerts.element.staticTexts["Final Score: 27 - 25"].exists)

    You can also test the title of the alert directly:

    XCTAssertEqual(app.alerts.element.label, "You won!")

    More examples available in my UI Testing Cheat Sheet and Examples post and sample app.