java - Robolectric KeyStoreKeyGenerator

我在我的Dagger2项目中使用KeyStoreKeyGenerator(来自in.co.ophio.secure)，并且我想使用Robolectric测试我的片段。

我向演示者注入(inject)片段。演示者已注入(inject)userPrefs。 UserPrefs已实现KeyStoreKeyGenerator

class UserPreferences(val application: App) : UserPreferencesAPI {
// another methods and fields
    private val keyGenerator = KeyStoreKeyGenerator.get(application, application.packageName)
}

这是我的主持人

 class MainPresenter(...,
                        val sharedPreference: UserPreferencesAPI)

这是我的考验

private MainFragment fragment;
private MainActivity activity;

@Before
public void setUp() {
    activity = Robolectric.buildActivity(MainActivity.class).create().start().resume().get();
    fragment = MainFragment.Companion.newInstance();
}

@Test
public void shouldBeNotNull() {
    Assertions.assertThat(activity).isNotNull();
}

运行测试后，我看到:

java.lang.NullPointerException
    at android.security.KeyStore.isHardwareBacked(KeyStore.java:318)
    at android.security.KeyChain.isBoundKeyAlgorithm(KeyChain.java:397)
    at in.co.ophio.secure.core.KeyStoreKeyGenerator.<init>(KeyStoreKeyGenerator.java:41)
    at in.co.ophio.secure.core.KeyStoreKeyGenerator.get(KeyStoreKeyGenerator.java:56)
    at unofficial.coderoid.wykop.newapp.utils.UserPreferences.<init>(UserPreferences.kt:24)

我应该创建影子KeyStoreKeyGenerator吗？我应该使用接口(interface)包装KeyStore类吗？

最佳答案

我设法通过编写自定义阴影http://robolectric.org/custom-shadows/来解决它

@Implements(android.security.KeyChain.class)
public class KeyChainShadow {
   @RealObject
   private KeyChain keyChain;


    @Implementation
    public static boolean isBoundKeyAlgorithm(String algorithm) {
        return false;
    }

}

别忘了用

@Config(shadows = KeyChainShadow.class)