/*
 * Copyright (C) 2007 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.unit_tests.os;

import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.MessageQueue.IdleHandler;
import android.test.suitebuilder.annotation.MediumTest;
import junit.framework.TestCase;

public class IdleHandlerTest extends TestCase {

    private static class BaseTestHandler extends TestHandlerThread {
        Handler mHandler;

        public BaseTestHandler() {
        }

        public void go() {
            mHandler = new Handler() {
                public void handleMessage(Message msg) {
                    BaseTestHandler.this.handleMessage(msg);
                }
            };
        }

        public void addIdleHandler() {
            Looper.myQueue().addIdleHandler(new IdleHandler() {
                public boolean queueIdle() {
                    return BaseTestHandler.this.queueIdle();
                }
            });
        }

        public void handleMessage(Message msg) {
        }

        public boolean queueIdle() {
            return false;
        }
    }

    @MediumTest
    public void testOneShotFirst() throws Exception {
        TestHandlerThread tester = new BaseTestHandler() {
            int mCount;

            public void go() {
                super.go();
                mCount = 0;
                mHandler.sendMessageDelayed(mHandler.obtainMessage(0), 100);
                addIdleHandler();
            }

            public void handleMessage(Message msg) {
                if (msg.what == 0) {
                    mHandler.sendMessageDelayed(mHandler.obtainMessage(1), 100);
                } else if (msg.what == 1) {
                    if (mCount == 1) {
                        success();
                    } else {
                        failure(new RuntimeException(
                                "Idle handler called " + mCount + " times"));
                    }
                }
            }

            public boolean queueIdle() {
                mCount++;
                return false;
            }
        };

        tester.doTest(1000);
    }

    @MediumTest
    public void testOneShotLater() throws Exception {
        TestHandlerThread tester = new BaseTestHandler() {
            int mCount;

            public void go() {
                super.go();
                mCount = 0;
                mHandler.sendMessage(mHandler.obtainMessage(0));
            }

            public void handleMessage(Message msg) {
                if (msg.what == 0) {
                    addIdleHandler();
                    mHandler.sendMessageDelayed(mHandler.obtainMessage(1), 100);
                } else if (msg.what == 1) {
                    mHandler.sendMessageDelayed(mHandler.obtainMessage(2), 100);
                } else if (msg.what == 2) {
                    if (mCount == 1) {
                        success();
                    } else {
                        failure(new RuntimeException(
                                "Idle handler called " + mCount + " times"));
                    }
                }
            }

            public boolean queueIdle() {
                mCount++;
                return false;
            }
        };

        tester.doTest(1000);
    }


    @MediumTest
    public void testRepeatedFirst() throws Exception {
        TestHandlerThread tester = new BaseTestHandler() {
            int mCount;

            public void go() {
                super.go();
                mCount = 0;
                mHandler.sendMessageDelayed(mHandler.obtainMessage(0), 100);
                addIdleHandler();
            }

            public void handleMessage(Message msg) {
                if (msg.what == 0) {
                    mHandler.sendMessageDelayed(mHandler.obtainMessage(1), 100);
                } else if (msg.what == 1) {
                    if (mCount == 2) {
                        success();
                    } else {
                        failure(new RuntimeException(
                                "Idle handler called " + mCount + " times"));
                    }
                }
            }

            public boolean queueIdle() {
                mCount++;
                return true;
            }
        };

        tester.doTest(1000);
    }

    @MediumTest
    public void testRepeatedLater() throws Exception {
        TestHandlerThread tester = new BaseTestHandler() {
            int mCount;

            public void go() {
                super.go();
                mCount = 0;
                mHandler.sendMessage(mHandler.obtainMessage(0));
            }

            public void handleMessage(Message msg) {
                if (msg.what == 0) {
                    addIdleHandler();
                    mHandler.sendMessageDelayed(mHandler.obtainMessage(1), 100);
                } else if (msg.what == 1) {
                    mHandler.sendMessageDelayed(mHandler.obtainMessage(2), 100);
                } else if (msg.what == 2) {
                    if (mCount == 2) {
                        success();
                    } else {
                        failure(new RuntimeException(
                                "Idle handler called " + mCount + " times"));
                    }
                }
            }

            public boolean queueIdle() {
                mCount++;
                return true;
            }
        };

        tester.doTest(1000);
    }
}