@Test
public void testSixLong() {
byte[] b = new byte[8];
for (long i = 0; i >>> 48 == 0; i = i + 1 + i / 10000) {
DataIO.putSixLong(b, 2, i);
assertEquals(i, DataIO.getSixLong(b, 2));
}
}
@Test
public void testPackLongSize() {
assertEquals(
"packLongSize should have returned 1 since number 1 can be represented using 1 byte when packed",
1,
DataIO.packLongSize(1));
assertEquals(
"packLongSize should have returned 2 since 1 << 7 can be represented using 2 bytes when packed",
2,
DataIO.packLongSize(1 << 7));
assertEquals(
"packLongSize should have returned 10 since 1 << 63 can be represented using 10 bytes when packed",
10,
DataIO.packLongSize(1 << 63));
}
@Test
public void testPackLong_WithStreams() throws IOException {
for (long valueToPack = 0;
valueToPack < Long.MAX_VALUE && valueToPack >= 0;
valueToPack = random.nextInt(2) + valueToPack * 2) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
DataIO.packLong(outputStream, valueToPack);
DataIO.packLong(outputStream, -valueToPack);
ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());
long unpackedLong = DataIO.unpackLong(inputStream);
assertEquals("Packed and unpacked values do not match", valueToPack, unpackedLong);
unpackedLong = DataIO.unpackLong(inputStream);
assertEquals("Packed and unpacked values do not match", -valueToPack, unpackedLong);
}
}
@Test(expected = EOFException.class)
public void testReadFully_throws_exception_if_not_enough_data() throws IOException {
InputStream inputStream = new ByteArrayInputStream(new byte[0]);
DataIO.readFully(inputStream, new byte[1]);
fail(
"An EOFException should have occurred by now since there are not enough bytes to read from the InputStream");
}
@Test(expected = EOFException.class)
public void testUnpackLong_withInputStream_throws_exception_when_stream_is_empty()
throws IOException {
DataIO.unpackLong(new ByteArrayInputStream(new byte[0]));
fail(
"An EOFException should have occurred by now since there are no bytes to read from the InputStream");
}
@Test
public void packInt() throws IOException {
DataInputByteArray in = new DataInputByteArray(new byte[20]);
DataOutputByteArray out = new DataOutputByteArray();
out.buf = in.buf;
for (int i = 0; i > 0; i = i + 1 + i / 10000) {
in.pos = 10;
out.pos = 10;
DataIO.packInt((DataOutput) out, i);
long i2 = DataIO.unpackInt(in);
assertEquals(i, i2);
assertEquals(in.pos, out.pos);
}
}
@Test
public void testFillLowBits() {
for (int bitCount = 0; bitCount < 64; bitCount++) {
assertEquals(
"fillLowBits should return a long value with 'bitCount' least significant bits set to one",
(1L << bitCount) - 1,
DataIO.fillLowBits(bitCount));
}
}
@Test
public void commitChecksum() {
WriteAheadLog wal = new WriteAheadLog(null);
wal.open(WriteAheadLog.NOREPLAY);
wal.startNextFile();
wal.walPutLong(111L, 1000);
wal.commit();
long offset1 = wal.fileOffset - 5;
int checksum1 = DataIO.longHash(wal.curVol.hash(16, offset1 - 16, 111L));
assertEquals(checksum1, wal.curVol.getInt(offset1 + 1));
wal.walPutLong(111L, 1000);
wal.commit();
long offset2 = wal.fileOffset - 5;
int checksum2 =
checksum1 + DataIO.longHash(wal.curVol.hash(offset1 + 5, offset2 - offset1 - 5, 111L));
assertEquals(checksum2, wal.curVol.getInt(offset2 + 1));
}
@Test
public void testPutLong() throws IOException {
for (long valueToPut = 0;
valueToPut < Long.MAX_VALUE && valueToPut >= 0;
valueToPut = random.nextInt(2) + valueToPut * 2) {
byte[] buffer = new byte[20];
DataIO.putLong(buffer, 2, valueToPut);
long returned = DataIO.getLong(buffer, 2);
assertEquals(
"The value that was put and the value returned from getLong do not match",
valueToPut,
returned);
DataIO.putLong(buffer, 2, -valueToPut);
returned = DataIO.getLong(buffer, 2);
assertEquals(
"The value that was put and the value returned from getLong do not match",
-valueToPut,
returned);
}
}
@Test
public void testReadFully_with_data_length_same_as_buffer_length() throws IOException {
byte[] inputBuffer = new byte[] {1, 2, 3, 4};
InputStream in = new ByteArrayInputStream(inputBuffer);
byte[] outputBuffer = new byte[4];
DataIO.readFully(in, outputBuffer);
assertArrayEquals(
"The passed buffer should be filled with the whole content of the InputStream"
+ " since the buffer length is exactly same as the data length",
inputBuffer,
outputBuffer);
}
@Test
public void testReadFully_with_too_much_data() throws IOException {
byte[] inputBuffer = new byte[] {1, 2, 3, 4};
InputStream in = new ByteArrayInputStream(inputBuffer);
byte[] outputBuffer = new byte[3];
DataIO.readFully(in, outputBuffer);
byte[] expected = new byte[] {1, 2, 3};
assertArrayEquals(
"The passed buffer should be filled with the first three bytes read from the InputStream",
expected,
outputBuffer);
}
@Test
public void testNextPowTwo() {
assertEquals(1, DataIO.nextPowTwo(1));
assertEquals(2, DataIO.nextPowTwo(2));
assertEquals(4, DataIO.nextPowTwo(3));
assertEquals(4, DataIO.nextPowTwo(4));
assertEquals(64, DataIO.nextPowTwo(33));
assertEquals(64, DataIO.nextPowTwo(61));
assertEquals(1024, DataIO.nextPowTwo(777));
assertEquals(1024, DataIO.nextPowTwo(1024));
assertEquals(1073741824, DataIO.nextPowTwo(1073741824 - 100));
assertEquals(1073741824, DataIO.nextPowTwo((int) (1073741824 * 0.7)));
assertEquals(1073741824, DataIO.nextPowTwo(1073741824));
}
@Test
public void testHexaConversion() {
byte[] b = new byte[] {11, 112, 11, 0, 39, 90};
assertTrue(Serializer.BYTE_ARRAY.equals(b, DataIO.fromHexa(DataIO.toHexa(b))));
}
@Test
public void testNextPowTwoLong() {
assertEquals(1, DataIO.nextPowTwo(1L));
assertEquals(2, DataIO.nextPowTwo(2L));
assertEquals(4, DataIO.nextPowTwo(3L));
assertEquals(4, DataIO.nextPowTwo(4L));
assertEquals(64, DataIO.nextPowTwo(33L));
assertEquals(64, DataIO.nextPowTwo(61L));
assertEquals(1024, DataIO.nextPowTwo(777L));
assertEquals(1024, DataIO.nextPowTwo(1024L));
assertEquals(1073741824, DataIO.nextPowTwo(1073741824L - 100));
assertEquals(1073741824, DataIO.nextPowTwo((long) (1073741824 * 0.7)));
assertEquals(1073741824, DataIO.nextPowTwo(1073741824L));
}