Tests for idle parole when charging

Make sure that when switching between idle, paroled
and battery saver, the network availability of the app
is correctly updated.

Bug: 31399882
Test: cts-tradefed run commandAndExit cts -m CtsHostsideNetworkTests -t com.android.cts.net.HostsideRestrictBackgroundNetworkTests#testAppIdleNonMetered_whenCharging
Test: cts-tradefed run commandAndExit cts -m CtsHostsideNetworkTests -t com.android.cts.net.HostsideRestrictBackgroundNetworkTests#testAppIdleMetered_whenCharging
Change-Id: I060a0d5f9c3297430b5b623b389c1afdf6abde87

tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractAppIdleTestCase.java

@@ -138,4 +138,28 @@ abstract class AbstractAppIdleTestCase extends AbstractRestrictBackgroundNetwork
         assertsForegroundAlwaysHasNetworkAccess();
         assertBackgroundNetworkAccess(true);
     }
+
+    public void testAppIdleNetworkAccess_whenCharging() throws Exception {
+        if (!isSupported()) return;
+
+        // Check that app is paroled when charging
+        setAppIdle(true);
+        assertBackgroundNetworkAccess(false);
+        turnBatteryOn();
+        assertBackgroundNetworkAccess(true);
+        turnBatteryOff();
+        assertBackgroundNetworkAccess(false);
+
+        // Check that app is restricted when not idle but power-save is on
+        setAppIdle(false);
+        assertBackgroundNetworkAccess(true);
+        setBatterySaverMode(true);
+        assertBackgroundNetworkAccess(false);
+        turnBatteryOn();
+        assertBackgroundNetworkAccess(true);
+
+        // And when no longer charging, it still has network access, since it's not idle
+        turnBatteryOff();
+        assertBackgroundNetworkAccess(true);
+    }
 }

tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java

@@ -171,6 +171,16 @@ public class HostsideRestrictBackgroundNetworkTests extends HostsideNetworkTestC
                 "testBackgroundNetworkAccess_enabled");
     }
 
+    public void testAppIdleNonMetered_whenCharging() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".AppIdleNonMeteredTest",
+                "testAppIdleNetworkAccess_whenCharging");
+    }
+
+    public void testAppIdleMetered_whenCharging() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".AppIdleMeteredTest",
+                "testAppIdleNetworkAccess_whenCharging");
+    }
+
     /********************
      * Doze Mode tests. *
      ********************/