### Question:
StripeApiHandler { @VisibleForTesting static String getRetrieveTokenApiUrl(@NonNull String tokenId) { return String.format("%s/%s", getApiUrl(), tokenId); }    }### Answer:
@Test public void testGetRequestTokenApiUrl() { String tokenId = "tok_sample"; String requestApi = StripeApiHandler.getRetrieveTokenApiUrl(tokenId); assertEquals("https: }