Merge "Deflake test to ensure system default network as expected"

tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java

@@ -57,7 +57,8 @@ public class ConnectivityManagerApi23Test extends AndroidTestCase {
     /**
      * Tests reporting of connectivity changed.
      */
-    public void testConnectivityChanged_manifestRequestOnly_shouldNotReceiveIntent() {
+    public void testConnectivityChanged_manifestRequestOnly_shouldNotReceiveIntent()
+            throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testConnectivityChanged_manifestRequestOnly_shouldNotReceiveIntent cannot execute unless device supports WiFi");
             return;
@@ -75,7 +76,7 @@ public class ConnectivityManagerApi23Test extends AndroidTestCase {
     }
 
     public void testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent()
-            throws InterruptedException {
+            throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot"
                     + "execute unless device supports WiFi");
@@ -94,7 +95,7 @@ public class ConnectivityManagerApi23Test extends AndroidTestCase {
                 getConnectivityCount, SEND_BROADCAST_TIMEOUT));
     }
 
-    public void testConnectivityChanged_whenRegistered_shouldReceiveIntent() {
+    public void testConnectivityChanged_whenRegistered_shouldReceiveIntent() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testConnectivityChanged_whenRegistered_shouldReceiveIntent cannot execute unless device supports WiFi");
             return;

tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java

@@ -1043,7 +1043,7 @@ public class ConnectivityManagerTest {
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    public void testToggleWifiConnectivityAction() {
+    public void testToggleWifiConnectivityAction() throws Exception {
         // toggleWifi calls connectToWifi and disconnectFromWifi, which both wait for
         // CONNECTIVITY_ACTION broadcasts.
         mCtsNetUtils.toggleWifi();

tests/cts/net/util/java/android/net/cts/util/CtsNetUtils.java

@@ -169,18 +169,44 @@ public final class CtsNetUtils {
     }
 
     // Toggle WiFi twice, leaving it in the state it started in
-    public void toggleWifi() {
+    public void toggleWifi() throws Exception {
         if (mWifiManager.isWifiEnabled()) {
             Network wifiNetwork = getWifiNetwork();
+            // Ensure system default network is WIFI because it's expected in disconnectFromWifi()
+            expectNetworkIsSystemDefault(wifiNetwork);
             disconnectFromWifi(wifiNetwork);
             connectToWifi();
         } else {
             connectToWifi();
             Network wifiNetwork = getWifiNetwork();
+            // Ensure system default network is WIFI because it's expected in disconnectFromWifi()
+            expectNetworkIsSystemDefault(wifiNetwork);
             disconnectFromWifi(wifiNetwork);
         }
     }
 
+    private Network expectNetworkIsSystemDefault(Network network)
+            throws Exception {
+        final CompletableFuture<Network> future = new CompletableFuture();
+        final NetworkCallback cb = new NetworkCallback() {
+            @Override
+            public void onAvailable(Network n) {
+                if (n.equals(network)) future.complete(network);
+            }
+        };
+
+        try {
+            mCm.registerDefaultNetworkCallback(cb);
+            return future.get(CONNECTIVITY_CHANGE_TIMEOUT_SECS, TimeUnit.SECONDS);
+        } catch (TimeoutException e) {
+            throw new AssertionError("Timed out waiting for system default network to switch"
+                    + " to network " + network + ". Current default network is network "
+                    + mCm.getActiveNetwork(), e);
+        } finally {
+            mCm.unregisterNetworkCallback(cb);
+        }
+    }
+
     /**
      * Enable WiFi and wait for it to become connected to a network.
      *