@Test public void createCustomParams_toParamMap_createsExpectedMap() { PaymentIntentParams paymentIntentParams = PaymentIntentParams.createCustomParams(); paymentIntentParams .setReturnUrl(TEST_RETURN_URL) .setClientSecret(TEST_CLIENT_SECRET) .setSourceId(TEST_SOURCE_ID); Map<String, Object> paramMap = paymentIntentParams.toParamMap(); Assert.assertEquals(paramMap.get(PaymentIntentParams.API_PARAM_SOURCE_ID), TEST_SOURCE_ID); Assert.assertEquals( paramMap.get(PaymentIntentParams.API_PARAM_CLIENT_SECRET), TEST_CLIENT_SECRET); Assert.assertEquals( paramMap.get(PaymentIntentParams.API_PARAM_RETURN_URL), TEST_RETURN_URL); }