Update SetupChooseLockPatternTest to SDK 26

- create a new ShadowResourcesImpl because sdk 26 calls loadDrawable
 from ResourcesImpl instead of Resources

Test: make RunSettingsRoboTests -j40
Change-Id: I8eed76ea779972c68893d4e7fdfc4493465b9b22

tests/robotests/src/com/android/settings/SetupChooseLockPatternTest.java

@@ -30,6 +30,7 @@ import com.android.settings.password.ChooseLockPattern.IntentBuilder;
 import com.android.settings.password.SetupChooseLockPattern;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.testutils.shadow.SettingsShadowResources;
+import com.android.settings.testutils.shadow.SettingsShadowResourcesImpl;
 import com.android.settings.testutils.shadow.ShadowEventLogWriter;
 import com.android.settings.testutils.shadow.ShadowUtils;
 
@@ -44,9 +45,10 @@ import org.robolectric.shadows.ShadowPackageManager.ComponentState;
 @RunWith(SettingsRobolectricTestRunner.class)
 @Config(
         manifest = TestConfig.MANIFEST_PATH,
-        sdk = TestConfig.SDK_VERSION,
+        sdk = TestConfig.SDK_VERSION_O,
         shadows = {
                 SettingsShadowResources.class,
+                SettingsShadowResourcesImpl.class,
                 SettingsShadowResources.SettingsShadowTheme.class,
                 ShadowEventLogWriter.class,
                 ShadowUtils.class

tests/robotests/src/com/android/settings/testutils/shadow/SettingsShadowResources.java

@@ -101,6 +101,13 @@ public class SettingsShadowResources extends ShadowResources {
         return directlyOn(realResources, Resources.class).getColorStateList(id, theme);
     }
 
+    /**
+     * Deprecated because SDK 24+ uses
+     * {@link SettingsShadowResourcesImpl#loadDrawable(Resources, TypedValue, int, int, Theme)}
+     *
+     * TODO: Delete when all tests have been migrated to sdk 26
+     */
+    @Deprecated
     @Implementation
     public Drawable loadDrawable(TypedValue value, int id, Theme theme)
             throws NotFoundException {

tests/robotests/src/com/android/settings/testutils/shadow/SettingsShadowResourcesImpl.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2017 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.testutils.shadow;
+
+import android.content.res.Resources;
+import android.content.res.ResourcesImpl;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
+import android.util.TypedValue;
+
+import com.android.settings.R;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.shadows.ShadowResourcesImpl;
+
+@Implements(
+        value = ResourcesImpl.class,
+        isInAndroidSdk = false,
+        minSdk = 26
+)
+public class SettingsShadowResourcesImpl extends ShadowResourcesImpl {
+
+    @Implementation
+    public Drawable loadDrawable(Resources wrapper, TypedValue value, int id, int density,
+            Resources.Theme theme) {
+        // The drawable item in switchbar_background.xml refers to a very recent color attribute
+        // that Robolectric isn't yet aware of.
+        // TODO: Remove this once Robolectric is updated.
+        if (id == R.drawable.switchbar_background) {
+            return new ColorDrawable();
+        } else if (id == R.drawable.ic_launcher_settings) {
+            // ic_launcher_settings uses adaptive-icon, which is not supported by robolectric,
+            // change it to a normal drawable.
+            id = R.drawable.ic_settings_wireless;
+        } else if (id == R.drawable.app_filter_spinner_background) {
+            id = R.drawable.ic_expand_more_inverse;
+        } else if (id == R.drawable.selectable_card_grey) {
+            id = R.drawable.ic_expand_more_inverse;
+        }
+        return super.loadDrawable(wrapper, value, id, density, theme);
+    }
+}