[Testing] Use AndroidJUnit4 instead in CarrierSettingsVersionPreferenceControllerTest

1. Use AndroidJunit4 instead of RobolectricTestRunner
2. Change the Copy Right
3. Remove the shadowCarrierConfigManager to mock the
CarrierConfigManager

Bug: 168281601
Test: atest -c CarrierSettingsVersionPreferenceControllerTest
Change-Id: Id14d103a82d2d2954721624ed7a16204ee0f25b6

tests/unit/src/com/android/settings/network/telephony/CarrierSettingsVersionPreferenceControllerTest.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network.telephony;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.os.PersistableBundle;
+import android.telephony.CarrierConfigManager;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(AndroidJUnit4.class)
+public class CarrierSettingsVersionPreferenceControllerTest {
+    @Mock
+    private CarrierConfigManager mCarrierConfigManager;
+
+    private CarrierSettingsVersionPreferenceController mController;
+    private int mSubscriptionId = 1234;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        Context context = spy(ApplicationProvider.getApplicationContext());
+        when(context.getSystemService(CarrierConfigManager.class)).thenReturn(mCarrierConfigManager);
+        mController = new CarrierSettingsVersionPreferenceController(context, "mock_key");
+        mController.init(mSubscriptionId);
+    }
+
+    @Test
+    public void getSummary_nullConfig_noCrash() {
+        doReturn(null).when(mCarrierConfigManager).getConfigForSubId(mSubscriptionId);
+
+        assertThat(mController.getSummary()).isNull();
+    }
+
+    @Test
+    public void getSummary_nullVersionString_noCrash() {
+        doReturn(new PersistableBundle()).when(mCarrierConfigManager)
+                .getConfigForSubId(mSubscriptionId);
+        assertThat(mController.getSummary()).isNull();
+    }
+
+    @Test
+    public void getSummary_hasVersionString_correctSummary() {
+        final PersistableBundle bundle = new PersistableBundle();
+        bundle.putString(CarrierConfigManager.KEY_CARRIER_CONFIG_VERSION_STRING,
+                "test_version_123");
+        doReturn(bundle).when(mCarrierConfigManager).getConfigForSubId(mSubscriptionId);
+
+        assertThat(mController.getSummary()).isEqualTo("test_version_123");
+    }
+}