how to mock a object in method

Question

I want to mock response object here when I call getHSMDecryptedData method from my test method.

private String getHSMDecryptedData(String keysetName, int groupIndex, String ksn, String encryptedData) { String decryptedData = null; try { DecryptData decrypt = new DecryptData(); decrypt.setKeySet(keysetName); decrypt.setKsnDescriptor("906"); decrypt.setKsn(ksn); decrypt.setKeyType(HSMKeyTypeDataModel.TYPE_BDK); decrypt.setEncryptionMode(HSMEncryptionMode.CBC); decrypt.setInputFormat(HSMDataFormat.HEX_ENCODED_BINARY); decrypt.setOutputFormat(HSMDataFormat.HEX_ENCODED_BINARY); decrypt.setMessage(encryptedData); // sending M2 command to HSM for decryption of encrypted data coming from CP DecryptDataResponse response = (DecryptDataResponse) HSMService.getInstance().processRequest(decrypt); System.out.println(response+"***************reponse"); if (response != null && response.getResponseCode() == HSMResponseCodes.APPROVED) { decryptedData = response.getDecryptedMessage(); TraceLog.Info(getClass(), "Message decrypted[" + decryptedData + "], original input[" + encryptedData + "], replacing original encrypted data!"); if (decryptedData == null) { // throw new FirstadatException("Unable to get the decrypted Data from HSM "); } }//FirstadatException

This is my test method:

HsmDataDecrypt hsmDataDecrypt = new HsmDataDecrypt(); try { DecryptDataResponse response=mock(DecryptDataResponse.class); //response. Method method = hsmDataDecrypt.getClass().getDeclaredMethod("getHSMDecryptedData", String.class,int.class,String.class,String.class);

You will probably find that PowerMock could solve your problem, since it allows you to mock static method calls. Don't! It's a bad solution for a problem you only have because your code is bad. Listen to Timothy, dependency injection will solve your problem and clean up your code nicely, while PowerMock will only allow you to hide the true problem. — Florian Schaetz
– Florian Schaetz, Commented May 30, 2017 at 13:17

Timothy Truckle · Accepted Answer · 2017-05-29 13:09:02Z

DecryptDataResponse response = (DecryptDataResponse) HSMService.getInstance().processRequest(decrypt);

You access the HSMService object via the Java Singleton Pattern. This kind of singletons are basically global variables which software developers consider being evil since the late 80s...

You better inject the HSMService object preferably as constructor parameter or any other dependency injection technique. In that case you can replace the HSMService object with a mock which in turn returns a mock of the DecryptDataResponse class on call of the processRequest method.

thanks for your suggestion , i have made changes accordingly by create a constructor that injecting the HSMService object , now its mocking the response. thanks.

Collectives™ on Stack Overflow

how to mock a object in method

1 Answer 1

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Related