/** Test that constructor offsets work */
@Test
public void testConstructor() throws Exception {
CountingInputStream cis;
cis = new CountingInputStream(NULL_INPUTSTREAM, 5l);
assertEquals(5l, cis.getPos());
cis.close();
cis = new CountingInputStream(NULL_INPUTSTREAM, 500000000000l);
assertEquals(500000000000l, cis.getPos());
cis.close();
}
/** Test that single byte reads have the desired effect on counting */
@Test
public void testSingleByteReads() throws Exception {
ByteArrayInputStream bais = new ByteArrayInputStream(TEST_ARRAY);
CountingInputStream cis = new CountingInputStream(bais);
assertEquals((long) 0, cis.getPos());
for (long i = 0; i < TEST_ARRAY.length; i++) {
assertEquals(i, cis.getPos());
int b = cis.read();
assertEquals((byte) b, TEST_ARRAY[(int) i]);
assertEquals(i + 1, cis.getPos());
}
assertEquals(TEST_ARRAY.length, cis.getPos());
assertEquals(-1, cis.read());
assertEquals(TEST_ARRAY.length, cis.getPos());
}
/** Test that two byte reads have the desired effect on counting */
@Test
public void testTwoByteReads() throws Exception {
ByteArrayInputStream bais = new ByteArrayInputStream(TEST_ARRAY);
CountingInputStream cis = new CountingInputStream(bais);
assertEquals((long) 0, cis.getPos());
for (long i = 0; i < TEST_ARRAY.length / 2; i++) {
assertEquals(i * 2, cis.getPos());
final byte[] read = new byte[2];
final int rtr = cis.read(read);
assertEquals(rtr, read.length);
assertEquals(read[0], TEST_ARRAY[(int) i * 2]);
assertEquals(read[1], TEST_ARRAY[(int) (i * 2) + 1]);
assertEquals("offset after read i=" + i + "; ", (i * 2) + read.length, cis.getPos());
}
assertEquals(TEST_ARRAY.length, cis.getPos());
assertEquals(-1, cis.read());
assertEquals(TEST_ARRAY.length, cis.getPos());
}