Fix broken test

- Remove a test which is a non-public method.
- Re-implemented the test.

Fix: 180874869
Test: Run robo test
Change-Id: Ic9716278653c874a8f7d98b56b7e32f19d157382

tests/robotests/src/com/android/settings/enterprise/GlobalHttpProxyPreferenceControllerTest.java

@@ -24,12 +24,9 @@ import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.ProxyInfo;
 
-import androidx.preference.Preference;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Answers;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
@@ -39,7 +36,7 @@ public class GlobalHttpProxyPreferenceControllerTest {
 
     private static final String KEY_GLOBAL_HTTP_PROXY = "global_http_proxy";
 
-    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    @Mock
     private Context mContext;
     @Mock
     private ConnectivityManager mCm;
@@ -49,6 +46,7 @@ public class GlobalHttpProxyPreferenceControllerTest {
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
+        when(mContext.getSystemService(ConnectivityManager.class)).thenReturn(mCm);
         mController = new GlobalHttpProxyPreferenceController(mContext);
     }
 
@@ -61,12 +59,6 @@ public class GlobalHttpProxyPreferenceControllerTest {
         assertThat(mController.isAvailable()).isTrue();
     }
 
-    @Test
-    public void testHandlePreferenceTreeClick() {
-        assertThat(mController.handlePreferenceTreeClick(new Preference(mContext, null, 0, 0)))
-                .isFalse();
-    }
-
     @Test
     public void testGetPreferenceKey() {
         assertThat(mController.getPreferenceKey()).isEqualTo(KEY_GLOBAL_HTTP_PROXY);