### Question:
CompanionProxyShard implements Closeable { public void dump(@NonNull final IndentingPrintWriter ipw) { ipw.printf("Companion proxy [ %s ] %s", mCompanionDevice, mCompanionDevice.getName()); ipw.println(); ipw.increaseIndent(); ipw.printPair("isClosed", mIsClosed); ipw.printPair("Start attempts", mStartAttempts); ipw.printPair("Start connection scheduled", mHandler.hasMessages(WHAT_START_SYSPROXY)); ipw.printPair("Instance", mInstance); ipw.printPair("networkTypeName", ConnectivityManager.getNetworkTypeName(mNetworkType)); ipw.printPair("isMetered", mIsMetered); ipw.printPair("isSysproxyConnected", mIsSysproxyConnected); ipw.println(); mProxyServiceHelper.dump(ipw); ipw.decreaseIndent(); } CompanionProxyShard(
            @NonNull final Context context,
            @NonNull final ProxyServiceHelper proxyServiceHelper,
            @NonNull final BluetoothDevice companionDevice,
            @NonNull final Listener listener,
            final int networkScore); @MainThread @Override // Closable void close(); @MainThread void startNetwork(); @MainThread void updateNetwork(final int networkScore); void dump(@NonNull final IndentingPrintWriter ipw);  }### Answer:
@Test public void testDump() { mCompanionProxyShard = createCompanionProxyShard(); mCompanionProxyShard.dump(mockIndentingPrintWriter); verify(mockIndentingPrintWriter).increaseIndent(); verify(mockIndentingPrintWriter).decreaseIndent(); }