Fix PolicyListener testing surface.

This CL updates VcnManager to provide a test-only method for getting
currently registered VcnUnderlyingNetworkPolicyListeners. This is
preferrable over the current method, which accesses VcnManager's private
Map directly.

Bug: 8675309
Test: atest FrameworksVcnTests
Change-Id: I7afd60ff55868ae44bfa74910ae02daf8a81b107

2 files changed, 18 insertions, 5 deletions

diff --git a/core/java/android/net/vcn/VcnManager.java b/core/java/android/net/vcn/VcnManager.java
index fa090f59a8b9..1a38338c26aa 100644
--- a/core/java/android/net/vcn/VcnManager.java
+++ b/core/java/android/net/vcn/VcnManager.java
@@ -28,8 +28,10 @@ import android.os.RemoteException;
 import android.os.ServiceSpecificException;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.annotations.VisibleForTesting.Visibility;
 
 import java.io.IOException;
+import java.util.Collections;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.Executor;
@@ -67,8 +69,7 @@ import java.util.concurrent.Executor;
 public class VcnManager {
     @NonNull private static final String TAG = VcnManager.class.getSimpleName();
 
-    @VisibleForTesting
-    public static final Map<
+    private static final Map<
                     VcnUnderlyingNetworkPolicyListener, VcnUnderlyingNetworkPolicyListenerBinder>
             REGISTERED_POLICY_LISTENERS = new ConcurrentHashMap<>();
 
@@ -88,6 +89,18 @@ public class VcnManager {
         mService = requireNonNull(service, "missing service");
     }
 
+    /**
+     * Get all currently registered VcnUnderlyingNetworkPolicyListeners for testing purposes.
+     *
+     * @hide
+     */
+    @VisibleForTesting(visibility = Visibility.PRIVATE)
+    @NonNull
+    public static Map<VcnUnderlyingNetworkPolicyListener, VcnUnderlyingNetworkPolicyListenerBinder>
+            getAllPolicyListeners() {
+        return Collections.unmodifiableMap(REGISTERED_POLICY_LISTENERS);
+    }
+
     // TODO: Make setVcnConfig(), clearVcnConfig() Public API
     /**
      * Sets the VCN configuration for a given subscription group.
diff --git a/tests/vcn/java/android/net/vcn/VcnManagerTest.java b/tests/vcn/java/android/net/vcn/VcnManagerTest.java
index f9db408462b7..7dada9d1b6d4 100644
--- a/tests/vcn/java/android/net/vcn/VcnManagerTest.java
+++ b/tests/vcn/java/android/net/vcn/VcnManagerTest.java
@@ -65,7 +65,7 @@ public class VcnManagerTest {
                 ArgumentCaptor.forClass(IVcnUnderlyingNetworkPolicyListener.class);
         verify(mMockVcnManagementService).addVcnUnderlyingNetworkPolicyListener(captor.capture());
 
-        assertTrue(VcnManager.REGISTERED_POLICY_LISTENERS.containsKey(mMockPolicyListener));
+        assertTrue(VcnManager.getAllPolicyListeners().containsKey(mMockPolicyListener));
 
         IVcnUnderlyingNetworkPolicyListener listenerWrapper = captor.getValue();
         listenerWrapper.onPolicyChanged();
@@ -78,7 +78,7 @@ public class VcnManagerTest {
 
         mVcnManager.removeVcnUnderlyingNetworkPolicyListener(mMockPolicyListener);
 
-        assertFalse(VcnManager.REGISTERED_POLICY_LISTENERS.containsKey(mMockPolicyListener));
+        assertFalse(VcnManager.getAllPolicyListeners().containsKey(mMockPolicyListener));
         verify(mMockVcnManagementService)
                 .addVcnUnderlyingNetworkPolicyListener(
                         any(IVcnUnderlyingNetworkPolicyListener.class));
@@ -88,7 +88,7 @@ public class VcnManagerTest {
     public void testRemoveVcnUnderlyingNetworkPolicyListenerUnknownListener() throws Exception {
         mVcnManager.removeVcnUnderlyingNetworkPolicyListener(mMockPolicyListener);
 
-        assertFalse(VcnManager.REGISTERED_POLICY_LISTENERS.containsKey(mMockPolicyListener));
+        assertFalse(VcnManager.getAllPolicyListeners().containsKey(mMockPolicyListener));
         verify(mMockVcnManagementService, never())
                 .addVcnUnderlyingNetworkPolicyListener(
                         any(IVcnUnderlyingNetworkPolicyListener.class));