Adding tests for fallback recents when a 3rd party launcher is installed

Change-Id: I1d4da13cc779f49832008b12b9628d01631faffe

tests/src/com/android/launcher3/testcomponent/TestCommandReceiver.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2018 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.launcher3.testcomponent;
+
+import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
+import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_ENABLED;
+import static android.content.pm.PackageManager.DONT_KILL_APP;
+
+import android.app.Instrumentation;
+import android.content.ComponentName;
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+
+import androidx.test.InstrumentationRegistry;
+
+/**
+ * Content provider to receive commands from tests
+ */
+public class TestCommandReceiver extends ContentProvider {
+
+    public static final String ENABLE_TEST_LAUNCHER = "enable-test-launcher";
+    public static final String DISABLE_TEST_LAUNCHER = "disable-test-launcher";
+
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        throw new UnsupportedOperationException("unimplemented mock method");
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        throw new UnsupportedOperationException("unimplemented mock method");
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        throw new UnsupportedOperationException("unimplemented mock method");
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        throw new UnsupportedOperationException("unimplemented mock method");
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        throw new UnsupportedOperationException("unimplemented mock method");
+    }
+
+    @Override
+    public Bundle call(String method, String arg, Bundle extras) {
+        switch (method) {
+            case ENABLE_TEST_LAUNCHER: {
+                getContext().getPackageManager().setComponentEnabledSetting(
+                        new ComponentName(getContext(), TestLauncherActivity.class),
+                        COMPONENT_ENABLED_STATE_ENABLED, DONT_KILL_APP);
+                return null;
+            }
+            case DISABLE_TEST_LAUNCHER: {
+                getContext().getPackageManager().setComponentEnabledSetting(
+                        new ComponentName(getContext(), TestLauncherActivity.class),
+                        COMPONENT_ENABLED_STATE_DISABLED, DONT_KILL_APP);
+                return null;
+            }
+
+        }
+        return super.call(method, arg, extras);
+    }
+
+    public static Bundle callCommand(String command) {
+        Instrumentation inst = InstrumentationRegistry.getInstrumentation();
+        Uri uri = Uri.parse("content://" + inst.getContext().getPackageName() + ".commands");
+        return inst.getTargetContext().getContentResolver().call(uri, command, null, null);
+    }
+}