/*
* 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 org.apache.harmony.tests.java.io;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import junit.framework.TestCase;
public class FileWriterTest extends TestCase {
private FileInputStream fis;
private BufferedWriter bw;
private File f;
private FileOutputStream fos;
private BufferedReader br;
/**
* java.io.FileWriter#FileWriter(java.io.File)
*/
public void test_ConstructorLjava_io_File() throws IOException {
fos = new FileOutputStream(f.getPath());
fos.write("Test String".getBytes());
fos.close();
bw = new BufferedWriter(new FileWriter(f));
bw.write(" After test string", 0, 18);
bw.close();
br = new BufferedReader(new FileReader(f.getPath()));
char[] buf = new char[100];
int r = br.read(buf);
br.close();
assertEquals("Failed to write correct chars", " After test string",
new String(buf, 0, r));
}
/**
* java.io.FileWriter#FileWriter(java.io.File, boolean)
*/
public void test_ConstructorLjava_io_FileZ() throws IOException {
FileWriter fileWriter = new FileWriter(f);
String first = "The first string for testing. ";
fileWriter.write(first);
fileWriter.close();
fileWriter = new FileWriter(f, true);
String second = "The second String for testing.";
fileWriter.write(second);
fileWriter.close();
FileReader fileReader = new FileReader(f);
char[] out = new char[first.length() + second.length() + 10];
int length = fileReader.read(out);
fileReader.close();
assertEquals(first + second, new String(out, 0, length));
fileWriter = new FileWriter(f);
first = "The first string for testing. ";
fileWriter.write(first);
fileWriter.close();
fileWriter = new FileWriter(f, false);
second = "The second String for testing.";
fileWriter.write(second);
fileWriter.close();
fileReader = new FileReader(f);
out = new char[first.length() + second.length() + 10];
length = fileReader.read(out);
fileReader.close();
assertEquals(second, new String(out, 0, length));
}
/**
* java.io.FileWriter#FileWriter(java.io.FileDescriptor)
*/
public void test_ConstructorLjava_io_FileDescriptor() throws IOException {
fos = new FileOutputStream(f.getPath());
fos.write("Test String".getBytes());
fos.close();
fis = new FileInputStream(f.getPath());
br = new BufferedReader(new FileReader(fis.getFD()));
char[] buf = new char[100];
int r = br.read(buf);
br.close();
fis.close();
assertTrue("Failed to write correct chars: " + new String(buf, 0, r),
new String(buf, 0, r).equals("Test String"));
}
/**
* java.io.FileWriter#FileWriter(java.lang.String)
*/
public void test_ConstructorLjava_lang_String() throws IOException {
fos = new FileOutputStream(f.getPath());
fos.write("Test String".getBytes());
fos.close();
bw = new BufferedWriter(new FileWriter(f.getPath()));
bw.write(" After test string", 0, 18);
bw.close();
br = new BufferedReader(new FileReader(f.getPath()));
char[] buf = new char[100];
int r = br.read(buf);
br.close();
assertEquals("Failed to write correct chars", " After test string",
new String(buf, 0, r));
}
/**
* java.io.FileWriter#FileWriter(java.lang.String, boolean)
*/
public void test_ConstructorLjava_lang_StringZ() throws IOException {
fos = new FileOutputStream(f.getPath());
fos.write("Test String".getBytes());
fos.close();
bw = new BufferedWriter(new FileWriter(f.getPath(), true));
bw.write(" After test string", 0, 18);
bw.close();
br = new BufferedReader(new FileReader(f.getPath()));
char[] buf = new char[100];
int r = br.read(buf);
br.close();
assertEquals("Failed to append to file",
"Test String After test string", new String(buf, 0, r));
fos = new FileOutputStream(f.getPath());
fos.write("Test String".getBytes());
fos.close();
bw = new BufferedWriter(new FileWriter(f.getPath(), false));
bw.write(" After test string", 0, 18);
bw.close();
br = new BufferedReader(new FileReader(f.getPath()));
buf = new char[100];
r = br.read(buf);
br.close();
assertEquals("Failed to overwrite file", " After test string",
new String(buf, 0, r));
}
/**
* Sets up the fixture, for example, open a network connection. This method
* is called before a test is executed.
*/
@Override
protected void setUp() throws Exception {
f = File.createTempFile("FileWriterTest", "tst");
}
/**
* Tears down the fixture, for example, close a network connection. This
* method is called after a test is executed.
*/
@Override
protected void tearDown() {
try {
bw.close();
} catch (Exception e) {
}
try {
fis.close();
} catch (Exception e) {
}
f.delete();
}
}