android-platform-libcore/luni/src/test/java/tests/api/java/io/FileDescriptorTest.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 tests.api.java.io;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;

import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetClass;
import dalvik.annotation.TestTargetNew;

@TestTargetClass(FileDescriptor.class)
public class FileDescriptorTest extends junit.framework.TestCase {

    private static String platformId = "JDK"
            + System.getProperty("java.vm.version").replace('.', '-');

    FileOutputStream fos;

    BufferedOutputStream os;

    FileInputStream fis;

    File f;

    /**
     * @tests java.io.FileDescriptor#FileDescriptor()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        method = "FileDescriptor",
        args = {}
    )
    public void test_Constructor() {
        // Test for method java.io.FileDescriptor()
        FileDescriptor fd = new FileDescriptor();
        assertTrue("Failed to create FileDescriptor",
                fd instanceof FileDescriptor);
    }

    /**
     * @tests java.io.FileDescriptor#sync()
     */
    @TestTargetNew(
        level = TestLevel.SUFFICIENT,
        notes = "SyncFailedException not checked since it is only thrown" +
                "by the native implementation of sync().",
        method = "sync",
        args = {}
    )
       public void test_sync() throws Exception {
        // Test for method void java.io.FileDescriptor.sync()
        f = File.createTempFile("fd" + platformId, ".tst");
        f.delete();
        fos = new FileOutputStream(f.getPath());
        fos.write("Test String".getBytes());
        fis = new FileInputStream(f.getPath());
        FileDescriptor fd = fos.getFD();
        fd.sync();
        int length = "Test String".length();
        assertEquals("Bytes were not written after sync", length, fis
                .available());

        // Regression test for Harmony-1494
        fd = fis.getFD();
        fd.sync();
        assertEquals("Bytes were not written after sync", length, fis
                .available());

        RandomAccessFile raf = new RandomAccessFile(f, "r");
        fd = raf.getFD();
        fd.sync();
        raf.close();
    }

    /**
     * @tests java.io.FileDescriptor#valid()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        method = "valid",
        args = {}
    )
    public void test_valid() {
        // Test for method boolean java.io.FileDescriptor.valid()
        try {
            f = new File(System.getProperty("java.io.tmpdir"), "fd.tst");
            f.delete();
            os = new BufferedOutputStream(fos = new FileOutputStream(f
                    .getPath()), 4096);
            FileDescriptor fd = fos.getFD();
            assertTrue("Valid fd returned false", fd.valid());
            os.close();
            assertTrue("Invalid fd returned true", !fd.valid());
        } catch (Exception e) {
            fail("Exception during test : " + e.getMessage());
        }

    }

    /**
     * Sets up the fixture, for example, open a network connection. This method
     * is called before a test is executed.
     */
    protected void setUp() {
    }

    /**
     * Tears down the fixture, for example, close a network connection. This
     * method is called after a test is executed.
     */
    protected void tearDown() {
        try {
            os.close();
        } catch (Exception e) {
        }
        try {
            fis.close();
        } catch (Exception e) {
        }
        try {
            fos.close();
        } catch (Exception e) {
        }
        try {
            f.delete();
        } catch (Exception e) {
        }
    }

    protected void doneSuite() {
    }
}