### Question:
ProxyNetworkAgent { @MainThread protected void maybeSetUpNetworkAgent( @Nullable final String reason, @Nullable final String companionName, @Nullable final Listener listener) { DebugAssert.isMainThread(); doSetUpNetworkAgent(reason, companionName, mCurrentNetworkScore, listener, ProxyNetworkAgent.MAYBE_RECYCLE_AGENT); } protected  ProxyNetworkAgent(
            @NonNull final Context context,
            @NonNull final NetworkCapabilities capabilities,
            @NonNull final ProxyLinkProperties proxyLinkProperties); @AnyThread void dump(@NonNull final IndentingPrintWriter ipw);  }### Answer:
@Test public void testMaybeSetUpNetworkAgent_NoAgent() { mProxyNetworkAgent.mCurrentNetworkAgent = null; mProxyNetworkAgent.maybeSetUpNetworkAgent(REASON, COMPANION_NAME, null); assertEquals(1, mProxyNetworkAgent.mNetworkAgents.size()); }