@Test
public void testClose() throws Exception {
BufferedCircularDiskStack test = null;
try {
test = openBufferedCircularDiskStack();
assertSizeLengthEquals(0, 0, 0, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack);
test.addFirst(input);
test.addFirst(input1);
test.addFirst(input2);
// now memory has 3 elements but disk has 0.
assertSizeLengthEquals(3, 18, 30, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack);
// close and re-open
test.close();
test = openBufferedCircularDiskStack();
// should have 3
assertSizeLengthEquals(3, 18, 30, test);
// all above should be in disk
CircularDiskQueueAndStackTest.assertSizeLengthEquals(3, 18, 30, test.stack);
} finally {
test.close();
}
}
@Test
public void testReadWrite() throws Exception {
try (BufferedCircularDiskStack test = openBufferedCircularDiskStack()) {
assertSizeLengthEquals(0, 0, 0, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack);
test.addFirst(input);
assertSizeLengthEquals(1, 6, 10, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack);
test.addFirst(input1);
assertSizeLengthEquals(2, 12, 20, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack);
test.addFirst(input2);
assertSizeLengthEquals(3, 18, 30, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack);
test.addFirst(input3);
assertSizeLengthEquals(4, 24, 40, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(1, 6, 10, test.stack);
assertArrayEquals(input, test.stack.peekFirst()); // the oldest one
test.addFirst(input4);
assertSizeLengthEquals(5, 30, 50, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(2, 12, 20, test.stack);
assertArrayEquals(input1, test.stack.peekFirst()); // 2nd oldest one
byte[] result4 = test.removeFirst();
assertSizeLengthEquals(4, 24, 40, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(
2, 12, 20, test.stack); // still be the same
assertArrayEquals(input4, result4);
byte[] result3 = test.removeFirst();
assertSizeLengthEquals(3, 18, 30, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(
2, 12, 20, test.stack); // still be the same
assertArrayEquals(input3, result3);
byte[] result2 = test.removeFirst();
assertSizeLengthEquals(2, 12, 20, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(
2, 12, 20, test.stack); // still be the same
assertArrayEquals(input2, result2);
byte[] result1 = test.removeFirst();
assertArrayEquals(input1, result1);
assertSizeLengthEquals(1, 6, 10, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(1, 6, 10, test.stack); // one removed
byte[] result = test.removeFirst();
assertArrayEquals(input, result);
assertSizeLengthEquals(0, 0, 0, test);
CircularDiskQueueAndStackTest.assertSizeLengthEquals(0, 0, 0, test.stack); // no more
} catch (Exception e) {
throw e;
}
}
public static void assertSizeLengthEquals(
long size, long length, long lengthOfStorage, BufferedCircularDiskStack sq) {
assertEquals(size, sq.size());
assertEquals(length, sq.length());
assertEquals(lengthOfStorage, sq.lengthOfStorage());
}
