/*
 * Copyright (C) 2009 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 android.content.res.cts;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import android.content.res.AssetFileDescriptor;
import android.os.ParcelFileDescriptor;
import android.test.AndroidTestCase;

public class AssetFileDescriptor_AutoCloseOutputStreamTest extends AndroidTestCase {

    private static final String FILE_NAME = "testAssertFileDescriptorAutoCloseOutputStream";
    private static final int FILE_LENGTH = 100;
    private static final int FILE_END = -1;
    private static final byte[] FILE_DATA = new byte[] {
            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08
            };

    private AssetFileDescriptor mAssetFileDes;

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
        // As {@link AssetFileDescripter#createOutputStream()}
        // and {@link AssetFileDescripter#createInputStream()} doc,
        // the input and output stream will be auto closed when the AssetFileDescriptor closed.
        // Here is no need to close AutoCloseOutputStream, as AssetFileDescriptor will do it for us.
        if(mAssetFileDes != null) {
            mAssetFileDes.close();
        }
        getContext().deleteFile(FILE_NAME);
    }

    /*
     * Test AutoCloseOutputStream life circle.
     * 1. Write file data into test file.
     */
    public void testAutoCloseOutputStream() throws IOException {
        File file = new File(getContext().getFilesDir(), FILE_NAME);
        file.createNewFile();
        ParcelFileDescriptor fd = ParcelFileDescriptor.open(file,
                ParcelFileDescriptor.MODE_READ_WRITE);
        mAssetFileDes = new AssetFileDescriptor(fd, 0, FILE_LENGTH);
        AssetFileDescriptor.AutoCloseOutputStream outputStream =
                new AssetFileDescriptor.AutoCloseOutputStream(mAssetFileDes);
        outputStream.write(FILE_DATA[0]);
        outputStream.write(FILE_DATA, 1, 5);
        outputStream.write(FILE_DATA);
        outputStream.flush();
        mAssetFileDes.close();
        mAssetFileDes = null;

        fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_WRITE);
        mAssetFileDes = new AssetFileDescriptor(fd, 0, FILE_LENGTH);
        FileInputStream inputStream = mAssetFileDes.createInputStream();
        for (int i = 0; i < 6; i++) {
            assertEquals(FILE_DATA[i], inputStream.read());
        }
        for (int i = 0; i < FILE_DATA.length; i++) {
            assertEquals(FILE_DATA[i], inputStream.read());
        }
        assertEquals(FILE_END, inputStream.read());
        mAssetFileDes.close();
        mAssetFileDes = null;
    }
}