### Question:
YubicoClient { public abstract VerificationResponse verify(String otp) throws YubicoVerificationException, YubicoValidationFailure;  abstract VerificationResponse verify(String otp); Integer getClientId(); void setClientId(Integer clientId); void setKey(String key); String getKey(); void setSync(Integer sync); void setMaxRetries(int maxRetries); String[] getWsapiUrls(); void setWsapiUrls(String[] wsapi); void setUserAgent(String userAgent); static YubicoClient getClient(Integer clientId, String key); static String getPublicId(String otp); static boolean isValidOTPFormat(String otp);  }### Answer:
@Test public void testBadOTP() throws YubicoVerificationException, YubicoValidationFailure { String otp="11111111111111111111111111111111111"; VerificationResponse response = client.verify(otp); assertNotNull(response); assertEquals(ResponseStatus.BAD_OTP, response.getStatus()); }
@Test public void testReplayedOTP() throws YubicoVerificationException, YubicoValidationFailure { String otp = "cccccccfhcbelrhifnjrrddcgrburluurftrgfdrdifj"; VerificationResponse response = client.verify(otp); assertNotNull(response); assertEquals(otp, response.getOtp()); assertEquals(ResponseStatus.REPLAYED_OTP, response.getStatus()); }
@Test public void testTwoQueries() throws YubicoVerificationException, YubicoValidationFailure { String otp = "cccccccfhcbelrhifnjrrddcgrburluurftrgfdrdifj"; VerificationResponse response = client.verify(otp); assertEquals(ResponseStatus.REPLAYED_OTP, response.getStatus()); VerificationResponse response2 = client.verify(otp); assertEquals(ResponseStatus.REPLAYED_OTP, response2.getStatus()); }