### Question:
OIDCConfig { public String getClientId() { return mAccount.mClientId; } private  OIDCConfig(AccountInfo account); String getClientId(); Uri getRedirectUri(); Uri getEndSessionRedirectUri(); @Nullable Uri getDiscoveryUri(); boolean isOAuth2Configuration(); String[] getScopes(); @Nullable CustomConfiguration getCustomConfiguration();  }### Answer:
@Test public void getClientId() { String id = mConfig.getClientId(); assertNotNull(id); assertEquals(CLIENT_ID, id); }