public void testReadLoop() throws Exception {
WritableGridFileChannel wgfc = fs.getWritableChannel("/readTest.txt", false, 100);
try {
assertTrue(wgfc.isOpen());
wgfc.write(ByteBuffer.wrap("This tests read loop.".getBytes()));
} finally {
wgfc.close();
}
ReadableGridFileChannel rgfc = fs.getReadableChannel("/readTest.txt");
try {
assertTrue(
"This tests read loop.".equals(new String(toBytes(Channels.newInputStream(rgfc)))));
} finally {
rgfc.close();
}
}
public void testReadableChannel() throws Exception {
String content = "This is the content of channelTest.txt";
writeToFile("/channelTest.txt", content, 10);
ReadableGridFileChannel channel = fs.getReadableChannel("/channelTest.txt");
try {
assertTrue(channel.isOpen());
ByteBuffer buffer = ByteBuffer.allocate(1000);
channel.read(buffer);
assertEquals(getStringFrom(buffer), content);
} finally {
channel.close();
}
assertFalse(channel.isOpen());
}
public void testReadableChannelPosition() throws Exception {
writeToFile("/position.txt", "0123456789", 3);
ReadableGridFileChannel channel = fs.getReadableChannel("/position.txt");
try {
assertEquals(channel.position(), 0);
channel.position(5);
assertEquals(channel.position(), 5);
assertEquals(getStringFromChannel(channel, 3), "567");
assertEquals(channel.position(), 8);
channel.position(2);
assertEquals(channel.position(), 2);
assertEquals(getStringFromChannel(channel, 5), "23456");
assertEquals(channel.position(), 7);
} finally {
channel.close();
}
}