Fix out of bounds in QuickQSPanelController

Make sure that we only select the correct number of tiles, therefore
there's no need to call subList. As we will always call setTiles if the
number of tiles in the resource changes. We'll always have enough tiles
to show.

Test: atest QuickQSControllerTest
Test: manual
Fixes: 173792244
Change-Id: I70a0e4903bb8e5a319dbbc8c321d8774f0dd3064

packages/SystemUI/src/com/android/systemui/qs/QuickQSPanelController.java

@@ -40,8 +40,6 @@ import javax.inject.Named;
 @QSScope
 public class QuickQSPanelController extends QSPanelControllerBase<QuickQSPanel> {
 
-    private List<QSTile> mAllTiles = new ArrayList<>();
-
     private final QSPanel.OnConfigurationChangedListener mOnConfigurationChangedListener =
             newConfig -> {
                 int newMaxTiles = getResources().getInteger(R.integer.quick_qs_panel_max_columns);
@@ -92,14 +90,14 @@ public class QuickQSPanelController extends QSPanelControllerBase<QuickQSPanel>
 
     @Override
     public void setTiles() {
-        mAllTiles.clear();
+        List<QSTile> tiles = new ArrayList();
         for (QSTile tile : mHost.getTiles()) {
-            mAllTiles.add(tile);
-            if (mAllTiles.size() == QuickQSPanel.DEFAULT_MAX_TILES) {
+            tiles.add(tile);
+            if (tiles.size() == mView.getNumQuickTiles()) {
                 break;
             }
         }
-        super.setTiles(mAllTiles.subList(0, mView.getNumQuickTiles()), true);
+        super.setTiles(tiles, true);
     }
 
     /** */

packages/SystemUI/tests/src/com/android/systemui/qs/QuickQSPanelControllerTest.kt

@@ -0,0 +1,111 @@
+/*
+ * 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.systemui.qs
+
+import android.testing.AndroidTestingRunner
+import androidx.test.filters.SmallTest
+import com.android.internal.logging.MetricsLogger
+import com.android.internal.logging.testing.UiEventLoggerFake
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.dump.DumpManager
+import com.android.systemui.media.MediaHost
+import com.android.systemui.plugins.qs.QSTile
+import com.android.systemui.qs.customize.QSCustomizerController
+import com.android.systemui.qs.logging.QSLogger
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.Mockito.`when`
+import org.mockito.Mockito.any
+import org.mockito.Mockito.times
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class QuickQSPanelControllerTest : SysuiTestCase() {
+
+    @Mock
+    private lateinit var quickQSPanel: QuickQSPanel
+    @Mock
+    private lateinit var qsTileHost: QSTileHost
+    @Mock
+    private lateinit var qsCustomizerController: QSCustomizerController
+    @Mock
+    private lateinit var mediaHost: MediaHost
+    @Mock
+    private lateinit var metricsLogger: MetricsLogger
+    private val uiEventLogger = UiEventLoggerFake()
+    @Mock
+    private lateinit var qsLogger: QSLogger
+    private val dumpManager = DumpManager()
+    @Mock
+    private lateinit var tile: QSTile
+    @Mock
+    private lateinit var tileLayout: TileLayout
+
+    private lateinit var controller: QuickQSPanelController
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+
+        `when`(quickQSPanel.tileLayout).thenReturn(tileLayout)
+        `when`(quickQSPanel.dumpableTag).thenReturn("")
+
+        controller = QuickQSPanelController(
+                quickQSPanel,
+                qsTileHost,
+                qsCustomizerController,
+                false,
+                mediaHost,
+                metricsLogger,
+                uiEventLogger,
+                qsLogger,
+                dumpManager
+        )
+
+        controller.init()
+    }
+
+    @After
+    fun tearDown() {
+        controller.onViewDetached()
+    }
+
+    @Test
+    fun testTileSublistWithFewerTiles_noCrash() {
+        `when`(quickQSPanel.numQuickTiles).thenReturn(3)
+
+        `when`(qsTileHost.tiles).thenReturn(listOf(tile, tile))
+
+        controller.setTiles()
+    }
+
+    @Test
+    fun testTileSublistWithTooManyTiles() {
+        val limit = 3
+        `when`(quickQSPanel.numQuickTiles).thenReturn(limit)
+        `when`(qsTileHost.tiles).thenReturn(listOf(tile, tile, tile, tile))
+
+        controller.setTiles()
+
+        verify(quickQSPanel, times(limit)).addTile(any())
+    }
+}