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I cannot get Capybara to click on the SCA/3DS ‘Complete authentication’ button when running RSpec tests. Similar tests which do not trigger SCA pass just fine, and if I run VNC to view what Firefox is doing, the button is visible and I can click it myself in the browser.

My problem seems very similar to what’s discussed in the comments here, but the solutions do not work: I have tried changing the browser used, and flattening the iframe traversal.

Test code:

  scenario "SCA required" do
    create_payment_method(account, payment_method: "stripe", last_four: "1234")

    visit "/billing"
    click_on "Enter Card Payment"

    within "#main-content" do
      within_frame(find("iframe")) do # Stripe payment form is in an iframe.
        find("input#Field-numberInput").set("4000002760003184") # SCA-required test card.
        find("input#Field-expiryInput").set("1234")
        find("input#Field-cvcInput").set("123")
        find("input#Field-postalCodeInput").set("12345")
      end
    end
    find("button#submit").click

    # Stripe nests the popup in several layers of iframes.
    stripe_frame = find("body > div > iframe") # Popup is prepended to the body element.
    switch_to_frame(stripe_frame)
    challenge_frame = find("iframe#challengeFrame")
    switch_to_frame(challenge_frame)
    fullscreen_frame = find("iframe.FullscreenFrame")
    switch_to_frame(fullscreen_frame)

    click_on "Complete authentication"

    switch_to_frame(:top)

    expect(page).to have_content "ends in 3184"
  end

Is there some way to debug what Selenium is doing under the hood here? I don’t see any movement on the page when running click_on "Complete authentication", but if I click on the button myself in the Firefox instance being controlled by Selenium it does work.

Running click_on "Complete authentication" returns the element clicked, which appears to be the expected element when I drop into Pry and call .text.

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