KeyPairGeneratorSpec 的 PowerMock 总是产生 Null

如何解决KeyPairGeneratorSpec 的 PowerMock 总是产生 Null

我只是想为我使用 AndroidKeyStore 功能生成非对称密钥的代码编写一个单元测试用例。我不得不模拟 KeyPairGeneratorSpec.class ，但不幸的是，在执行具有 KeyPairGeneratorSpec.class 对象创建的代码段时，我的代码因空指针异常而失败。我已经添加了我的单元测试用例代码以及它试图模拟的代码部分。我通过更改参数来玩“withnew”，但结果是一样的。我正在关注代码 ReferenceCode 。它在 288 行失败了 '.setAlias(.setAlias(asymmetric_ALIAS)` '如果我遗漏了什么，请告诉我。我对这个框架很陌生。

@RunWith(powermockrunner.class)
@PowerMockIgnore({"java.management.*"})
@PrepareForTest({KeyStore.class,CipherUtils.class,Log.class,KeyPairGenerator.class,KeyPairGeneratorSpec.class,KeyGenerator.class,Cipher.class,Base64.class})

  @Test
    public void testasymmetricEncryptionAndDecryption() throws Exception {

        ReflectionHelpers.setStaticField(Build.VERSION.class,"SDK_INT",19);

        powermockito.mockStatic(KeyPairGenerator.class);
        powermockito.mockStatic(KeyPairGeneratorSpec.class);
        KeyPairGeneratorSpec spec = powermockito.mock(KeyPairGeneratorSpec.class);
        KeyPairGeneratorSpec.Builder builder = newKeyPairGeneratorSpecBuilder(spec);
        powermockito.whenNew(KeyPairGeneratorSpec.Builder.class).withAnyArguments().thenReturn(builder;

我试图模拟的代码被剪断

  Calendar start = Calendar.getInstance();
                        Calendar end = Calendar.getInstance();
                        end.add(Calendar.YEAR,30);

                        KeyPairGeneratorSpec.Builder specBuilder = new KeyPairGeneratorSpec.Builder(null)
                                .setAlias(asymmetric_ALIAS)
                                .setSubject(new X500Principal("CN=" + asymmetric_ALIAS))
                                .setKeySize(2048)
                                .setSerialNumber(BigInteger.ONE)
                                .setStartDate(start.getTime())
                                .setEndDate(end.getTime());

                        keyPairGenerator = KeyPairGenerator.getInstance(KeyProperties.KEY_ALGORITHM_RSA,KEYSTORE_NAME);
                        AlgorithmParameterSpec spec = specBuilder.build();
                        keyPairGenerator.initialize(spec);
                        keyPairGenerator.generateKeyPair();

newKeyPairGeneratorSpecBuilder 调用

private KeyPairGeneratorSpec.Builder newKeyPairGeneratorSpecBuilder(KeyPairGeneratorSpec expectedBuilderOutput) {
        KeyPairGeneratorSpec.Builder builder = powermockito.mock(KeyPairGeneratorSpec.Builder.class);
        powermockito.when(builder.setAlias(asymmetric_ALIAS)).thenReturn(builder);
        powermockito.when(builder.setSubject(Matchers.any(X500Principal.class))).thenReturn(builder);
        powermockito.when(builder.setKeySize(Matchers.anyInt())).thenReturn(builder);
        powermockito.when(builder.setStartDate(Matchers.any(Date.class))).thenReturn(builder);
        powermockito.when(builder.setEndDate(Matchers.any(Date.class))).thenReturn(builder);
        powermockito.when(builder.setEncryptionrequired()).thenReturn(builder);
        powermockito.when(builder.build()).thenReturn(expectedBuilderOutput);
        return builder;
    }

堆栈跟踪

ava.lang.NullPointerException
    at com.amazon.appexpan.client.util.CipherUtils.CreateKeys(CipherUtils.java:288)
    at com.amazon.appexpan.client.util.CipherUtils.asymmetricEncryption(CipherUtils.java:136)
    at com.amazon.appexpan.client.util.CipherUtilsTest.testasymmetricEncryptionAndDecryption(CipherUtilsTest.java:156)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonpowermockrunner.run(AbstractCommonpowermockrunner.java:53)
    at org.powermock.modules.junit4.powermockrunner.run(powermockrunner.java:59)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
java.lang.NullPointerException