Robolectric KeyStoreKeyGenerator

Question

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

我将presenter注入到我的片段中。演示者注入了userPrefs。UserPrefs实现了KeyStoreKeyGenerator

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

这是我的演示者

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

这是我的测试

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？我应该用接口包装KeyStore类吗？

Answer 1

我设法通过编写一个自定义的影子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;
    }

}

别忘了用注解你的测试

@Config(shadows = KeyChainShadow.class)