This is a testharness.js-based test.
[FAIL] Must return false when the PMI is not supported at by the user agent.
  promise_test: Unhandled rejection with value: object "UnknownError: Renderer process could not establish or lost IPC connection to the PaymentRequest service in the browser process."
[FAIL] Must return true when basic-card is amongst unsupported PMIs.
  promise_test: Unhandled rejection with value: object "UnknownError: Renderer process could not establish or lost IPC connection to the PaymentRequest service in the browser process."
[FAIL] If basic-card is supported, then return a promise that resolves to true.
  assert_equals: if it throws, then it must be a NotAllowedError. expected "NotAllowedError" but got "UnknownError"
Harness: the test ran to completion.