问题
I have the below method which I need to write unit tests for. But I cannot spy the class KeyStore. It throws the below exception.
org.mockito.exceptions.base.MockitoException: Unable to create mock instance of type 'KeyStore'
I can mock it though. But when I go to assign the behavior for the mock methods it throws exceptions. Methods I called and the exceptions I got are as follows.
when(keyStoreMock.getCertificate(anyString())).thenReturn(certificateMock);
java.security.KeyStoreException: Uninitialized keystore
doNothing().when(keyStoreMock).load(any(InputStream.class),Mockito.any(char[].class));
java.lang.NullPointerException
Below is the method I'm trying to test.
public boolean verifySignature(String filePath, String extractContentsPath, String csvParams)
throws ServiceSDKException {
boolean result = false;
String typeOfCertificateStore = "";
String certificateStoreProvider = "";
String certificateName = "";
SignerInformationVerifier verifier = null;
if (filePath != null && extractContentsPath != null && csvParams != null && !filePath.isEmpty()
&& !extractContentsPath.isEmpty() && !csvParams.isEmpty()) {
try {
String[] receivedParams = csvParams.split(",");
typeOfCertificateStore = receivedParams[0];
certificateStoreProvider = receivedParams[1];
certificateName = receivedParams[2];
} catch (ArrayIndexOutOfBoundsException e) {
throw new ServiceSDKException("csvParams should have type of certificate store, certificate store provider and certificate name respectively", e);
}
try {
Path signedDataFilePath = Paths.get(filePath);
Path pathToExtractContents = Paths.get(extractContentsPath);
KeyStore msCertStore = KeyStore.getInstance(typeOfCertificateStore, certificateStoreProvider);
msCertStore.load(null, null);
try {
verifier = new JcaSimpleSignerInfoVerifierBuilder()
.setProvider(certificateStoreProvider)
.build(((X509Certificate) msCertStore.getCertificate(certificateName)));
} catch (Exception e) {
throw new ServiceSDKException("Exception occurred when building certificate",e);
}
verify(signedDataFilePath, pathToExtractContents, verifier);
result = true;
} catch (KeyStoreException | NoSuchProviderException | IOException | NoSuchAlgorithmException
| CertificateException e) {
result = false;
throw new ServiceSDKException("Exception occurred while preparing to verify signature " , e);
}
} else {
throw new ServiceSDKException("FilePath,extract contents path or csv params cannot be empty or null");
}
return result;
}
How can I mock KeyStore and its method behaviors? Please advice.
NEW TEST METHOD USING MOCKITO :
@PrepareForTest(KeyStore.class)
@Test
public void should_verify_signature_when_verifySignature_called_with_fileName_and_certificate_details_in_verifySignature_method() throws Exception {
PowerMockito.mockStatic(KeyStore.class);
KeyStore keyStoreMock = PowerMockito.mock(KeyStore.class);
PowerMockito.when(KeyStore.getInstance(anyString())).thenReturn(keyStoreMock);
Mockito.doNothing().when(keyStoreMock).load(any(InputStream.class), Mockito.any(char[].class));
Certificate certificateMock = Mockito.mock(Certificate.class);
when(keyStoreMock.getCertificate(anyString())).thenReturn(certificateMock);
PowerMockito.when(KeyStore.getInstance("Windows-MY", "MoonMSCAPI")).thenReturn(keyStoreMock);
boolean result = signatureUtil.verifySignature("src//test//java//Updates.zip.signed.pkcs7"
, "src//test//java//Updates-retrieved.zip", "Windows-MY,MoonMSCAPI,Software View Certificate Authority");
Assert.assertTrue(result);
}
回答1:
KeyStore is a System class (java.security.KeyStore) . You will need to use the approach for mocking system classes as specified with powermock!
Code example
回答2:
You can mock without usage of the PowerMock it but in a slightly more complicated way:
KeyStoreSpi keyStoreSpiMock = mock(KeyStoreSpi.class);
KeyStore keyStoreMock = new KeyStore(keyStoreSpiMock, null, "test"){ };
keyStoreMock.load(null); // this is important to put the internal state "initialized" to true
From now you just mock keyStoreSpiMock
, for example:
when(keyStoreSpiMock.engineGetKey(any(), any())).thenReturn(mock(Key.class);
来源:https://stackoverflow.com/questions/36354270/how-to-mock-keystore-class-and-assign-mock-behavior-to-its-methods