Fingerprint suggestion should not be dismissed until fingerprint added

- Do not dismiss fingerprint suggestion until atleast one fingerprint is
added.

bug: 36578142
Test: robotest & manually verified.
Change-Id: I3151c9ae971666a0964be007103a9b7ad41de5ce
(cherry picked from commit 51ef801b3245f37680e1513d7f2b22aea02754ba)
diff --git a/src/com/android/settings/dashboard/suggestions/SuggestionsChecks.java b/src/com/android/settings/dashboard/suggestions/SuggestionsChecks.java
index 9a92c93..1be2c68 100644
--- a/src/com/android/settings/dashboard/suggestions/SuggestionsChecks.java
+++ b/src/com/android/settings/dashboard/suggestions/SuggestionsChecks.java
@@ -68,7 +68,11 @@
         } else if (className.equals(ScreenLockSuggestionActivity.class.getName())) {
             return isDeviceSecured();
         } else if (className.equals(FingerprintEnrollSuggestionActivity.class.getName())) {
-            return isDeviceSecured() || !isFingerprintEnabled();
+            FingerprintManager manager = Utils.getFingerprintManagerOrNull(mContext);
+            if (manager == null || !isFingerprintEnabled()) {
+                return true;
+            }
+            return manager.hasEnrolledFingerprints();
         }
 
         SuggestionFeatureProvider provider =
diff --git a/tests/robotests/src/com/android/settings/dashboard/suggestions/SuggestionsChecksTest.java b/tests/robotests/src/com/android/settings/dashboard/suggestions/SuggestionsChecksTest.java
new file mode 100644
index 0000000..72231b2
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/dashboard/suggestions/SuggestionsChecksTest.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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.dashboard.suggestions;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.when;
+
+import android.app.admin.DevicePolicyManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.hardware.fingerprint.FingerprintManager;
+
+import com.android.settings.Settings;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settingslib.drawer.Tile;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class SuggestionsChecksTest {
+
+    @Mock
+    private Context mContext;
+    @Mock
+    private PackageManager mPackageManager;
+    @Mock
+    private FingerprintManager mFingerprintManager;
+    @Mock
+    private DevicePolicyManager mDevicePolicyManager;
+
+    private SuggestionsChecks mSuggestionsChecks;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        when(mContext.getApplicationContext()).thenReturn(mContext);
+        mSuggestionsChecks = new SuggestionsChecks(mContext);
+        when(mContext.getPackageManager()).thenReturn(mPackageManager);
+        when(mContext.getSystemService(eq(Context.DEVICE_POLICY_SERVICE)))
+                .thenReturn(mDevicePolicyManager);
+        when(mDevicePolicyManager.getKeyguardDisabledFeatures(any(), anyInt()))
+                .thenReturn(0);
+        when(mContext.getSystemService(FingerprintManager.class)).thenReturn(mFingerprintManager);
+    }
+
+    @Test
+    public void testFingerprintEnrollmentIntroductionIsCompleteWhenFingerprintAdded() {
+        stubFingerprintSupported(true);
+        when(mFingerprintManager.hasEnrolledFingerprints()).thenReturn(true);
+        Tile tile = createFingerprintTile();
+        assertThat(mSuggestionsChecks.isSuggestionComplete(tile)).isTrue();
+    }
+
+    @Test
+    public void testFingerprintEnrollmentIntroductionIsNotCompleteWhenNoFingerprintAdded() {
+        stubFingerprintSupported(true);
+        when(mFingerprintManager.hasEnrolledFingerprints()).thenReturn(false);
+        Tile tile = createFingerprintTile();
+        assertThat(mSuggestionsChecks.isSuggestionComplete(tile)).isFalse();
+    }
+
+
+    @Test
+    public void testFingerprintEnrollmentIntroductionIsCompleteWhenFingerprintNotSupported() {
+        stubFingerprintSupported(false);
+        Tile tile = createFingerprintTile();
+        assertThat(mSuggestionsChecks.isSuggestionComplete(tile)).isTrue();
+    }
+
+    @Test
+    public void testFingerprintEnrollmentIntroductionIsCompleteWhenFingerprintDisabled() {
+        stubFingerprintSupported(true);
+        when(mFingerprintManager.hasEnrolledFingerprints()).thenReturn(false);
+        when(mDevicePolicyManager.getKeyguardDisabledFeatures(any(), anyInt()))
+                .thenReturn(DevicePolicyManager.KEYGUARD_DISABLE_FINGERPRINT);
+
+        Tile tile = createFingerprintTile();
+        assertThat(mSuggestionsChecks.isSuggestionComplete(tile)).isTrue();
+    }
+
+    private void stubFingerprintSupported(boolean enabled) {
+        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT))
+                .thenReturn(enabled);
+    }
+
+    private Tile createFingerprintTile() {
+        Tile tile = new Tile();
+        tile.intent = new Intent();
+        tile.intent.setComponent(new ComponentName(mContext,
+                Settings.FingerprintEnrollSuggestionActivity.class));
+        return tile;
+    }
+}