Merge "[CEC Configuration] Add a fake HdmiCecConfig class for testing"

/*

 * 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.server.hdmi;

import android.annotation.NonNull;

import android.content.Context;

import android.util.Slog;

import com.android.server.hdmi.cec.config.CecSettings;

import com.android.server.hdmi.cec.config.XmlParser;

import org.xmlpull.v1.XmlPullParserException;

import java.io.ByteArrayInputStream;

import java.io.IOException;

import javax.xml.datatype.DatatypeConfigurationException;

/**

 *  Fake class which loads default system configuration with user-configurable

 *  settings (useful for testing).

 */

final class FakeHdmiCecConfig extends HdmiCecConfig {

    private static final String TAG = "FakeHdmiCecConfig";

    private static final String SYSTEM_CONFIG_XML =

            "<?xml version='1.0' encoding='utf-8' standalone='yes' ?>"

                  + "<cec-settings>"

                  + "  <setting name=\"send_standby_on_sleep\""

                  + "           value-type=\"string\""

                  + "           user-configurable=\"true\">"

                  + "    <allowed-values>"

                  + "      <value string-value=\"to_tv\" />"

                  + "      <value string-value=\"broadcast\" />"

                  + "      <value string-value=\"none\" />"

                  + "    </allowed-values>"

                  + "    <default-value string-value=\"to_tv\" />"

                  + "  </setting>"

                  + "</cec-settings>";

    FakeHdmiCecConfig(@NonNull Context context) {

        super(context, new StorageAdapter(), parseFromString(SYSTEM_CONFIG_XML), null);

    }

    private static CecSettings parseFromString(@NonNull String configXml) {

        CecSettings config = null;

        try {

            config = XmlParser.read(

                    new ByteArrayInputStream(configXml.getBytes()));

        } catch (IOException | DatatypeConfigurationException | XmlPullParserException e) {

            Slog.e(TAG, "Encountered an error while reading/parsing CEC config strings", e);

        }

        return config;

    }

}