[Provider Model] Add progress bar to internet panel

- Show progress bar when Wi-Fi scanning

- Show "Searching for networks..." sub-title when Wi-Fi scanning

- Remove "Wi-Fi" from searching networks string

Bug: 178774497
Test: manual test
atest -c InternetConnectivityPanelTest
make RunSettingsRoboTests ROBOTEST_FILTER=PanelFragmentTest

Change-Id: Ic05b939bef3b106845fe90db41eb09f0e15756f4

tests/unit/src/com/android/settings/panel/InternetConnectivityPanelTest.java

@@ -18,8 +18,12 @@ package com.android.settings.panel;
 
 import static com.google.common.truth.Truth.assertThat;
 
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.Mockito.clearInvocations;
 import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -28,6 +32,7 @@ import android.content.Context;
 import android.net.Uri;
 import android.net.wifi.ScanResult;
 import android.net.wifi.WifiManager;
+import android.os.Handler;
 
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
@@ -70,6 +75,8 @@ public class InternetConnectivityPanelTest {
     @Rule
     public final MockitoRule mMocks = MockitoJUnit.rule();
     @Mock
+    Handler mMainThreadHandler;
+    @Mock
     PanelContentCallback mPanelContentCallback;
     @Mock
     InternetUpdater mInternetUpdater;
@@ -85,6 +92,7 @@ public class InternetConnectivityPanelTest {
     public void setUp() {
         mContext = spy(ApplicationProvider.getApplicationContext());
         when(mContext.getApplicationContext()).thenReturn(mContext);
+        when(mContext.getMainThreadHandler()).thenReturn(mMainThreadHandler);
         when(mContext.getSystemService(WifiManager.class)).thenReturn(mWifiManager);
 
         mPanel = InternetConnectivityPanel.create(mContext);
@@ -310,6 +318,65 @@ public class InternetConnectivityPanelTest {
         verify(mPanelContentCallback).onCustomizedButtonStateChanged();
     }
 
+    @Test
+    public void showProgressBar_wifiDisabled_hideProgress() {
+        mPanel.mIsProgressBarVisible = true;
+        doReturn(false).when(mInternetUpdater).isWifiEnabled();
+        clearInvocations(mPanelContentCallback);
+
+        mPanel.showProgressBar();
+
+        assertThat(mPanel.isProgressBarVisible()).isFalse();
+        verify(mPanelContentCallback).onProgressBarVisibleChanged();
+    }
+
+    @Test
+    public void showProgressBar_noWifiScanResults_showProgressForever() {
+        mPanel.mIsProgressBarVisible = false;
+        doReturn(true).when(mInternetUpdater).isWifiEnabled();
+        List<ScanResult> noWifiScanResults = new ArrayList<>();
+        doReturn(noWifiScanResults).when(mWifiManager).getScanResults();
+        clearInvocations(mPanelContentCallback);
+
+        mPanel.showProgressBar();
+
+        assertThat(mPanel.isProgressBarVisible()).isTrue();
+        verify(mPanelContentCallback).onProgressBarVisibleChanged();
+        verify(mPanelContentCallback).onHeaderChanged();
+        verify(mMainThreadHandler, never())
+                .postDelayed(any() /* mHideProgressBarRunnable */, anyLong());
+    }
+
+    @Test
+    public void showProgressBar_hasWifiScanResults_showProgressDelayedHide() {
+        mPanel.mIsProgressBarVisible = false;
+        doReturn(true).when(mInternetUpdater).isWifiEnabled();
+        List<ScanResult> hasWifiScanResults = mock(ArrayList.class);
+        doReturn(1).when(hasWifiScanResults).size();
+        doReturn(hasWifiScanResults).when(mWifiManager).getScanResults();
+        clearInvocations(mPanelContentCallback);
+
+        mPanel.showProgressBar();
+
+        assertThat(mPanel.isProgressBarVisible()).isTrue();
+        verify(mPanelContentCallback).onProgressBarVisibleChanged();
+        verify(mPanelContentCallback).onHeaderChanged();
+        verify(mMainThreadHandler).postDelayed(any() /* mHideProgressBarRunnable */, anyLong());
+    }
+
+    @Test
+    public void setProgressBarVisible_onProgressBarVisibleChanged() {
+        mPanel.mIsProgressBarVisible = false;
+        doReturn(true).when(mInternetUpdater).isWifiEnabled();
+        clearInvocations(mPanelContentCallback);
+
+        mPanel.setProgressBarVisible(true);
+
+        assertThat(mPanel.mIsProgressBarVisible).isTrue();
+        verify(mPanelContentCallback).onProgressBarVisibleChanged();
+        verify(mPanelContentCallback).onHeaderChanged();
+    }
+
     private void mockCondition(boolean airplaneMode, boolean hasCarrier,
             boolean isDataSimActive, boolean isMobileDataEnabled, boolean isServiceInService,
             boolean isWifiEnabled, List<ScanResult> wifiItems) {