public void testDecodeIntFails() {
try {
// One more than maximum value
int unused = UnsignedInts.decode("0xfffffffff");
fail();
} catch (NumberFormatException expected) {
}
try {
int unused = UnsignedInts.decode("-5");
fail();
} catch (NumberFormatException expected) {
}
try {
int unused = UnsignedInts.decode("-0x5");
fail();
} catch (NumberFormatException expected) {
}
try {
int unused = UnsignedInts.decode("-05");
fail();
} catch (NumberFormatException expected) {
}
}
public void testMin() {
assertEquals(LEAST, UnsignedInts.min(LEAST));
assertEquals(GREATEST, UnsignedInts.min(GREATEST));
assertEquals(
(int) 0L,
UnsignedInts.min(
(int) 8L,
(int) 6L,
(int) 7L,
(int) 0x12345678L,
(int) 0x5a4316b8L,
(int) 0xff1a618bL,
(int) 0L));
}
public void testParseInt() {
try {
for (long a : UNSIGNED_INTS) {
assertEquals((int) a, UnsignedInts.parseUnsignedInt(Long.toString(a)));
}
} catch (NumberFormatException e) {
fail(e.getMessage());
}
try {
UnsignedInts.parseUnsignedInt(Long.toString(1L << 32));
fail("Expected NumberFormatException");
} catch (NumberFormatException expected) {
}
}
@GwtIncompatible("Too slow in GWT (~3min fully optimized)")
public void testDivideRemainderEuclideanProperty() {
// Use a seed so that the test is deterministic:
Random r = new Random(0L);
for (int i = 0; i < 1000000; i++) {
int dividend = r.nextInt();
int divisor = r.nextInt();
// Test that the Euclidean property is preserved:
assertTrue(
dividend
- (divisor * UnsignedInts.divide(dividend, divisor)
+ UnsignedInts.remainder(dividend, divisor))
== 0);
}
}
public void testParseIntWithRadix() {
for (long a : UNSIGNED_INTS) {
for (int radix = Character.MIN_RADIX; radix <= Character.MAX_RADIX; radix++) {
assertEquals((int) a, UnsignedInts.parseUnsignedInt(Long.toString(a, radix), radix));
}
}
}
public void testParseIntFail() {
try {
int unused = UnsignedInts.parseUnsignedInt(Long.toString(1L << 32));
fail("Expected NumberFormatException");
} catch (NumberFormatException expected) {
}
}
public void testMin_noArgs() {
try {
int unused = UnsignedInts.min();
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testToString() {
int[] bases = {2, 5, 7, 8, 10, 16};
for (long a : UNSIGNED_INTS) {
for (int base : bases) {
assertEquals(UnsignedInts.toString((int) a, base), Long.toString(a, base));
}
}
}
public void testParseIntWithRadixLimits() {
// loops through all legal radix values.
for (int radix = Character.MIN_RADIX; radix <= Character.MAX_RADIX; radix++) {
// tests can successfully parse a number string with this radix.
String maxAsString = Long.toString((1L << 32) - 1, radix);
assertEquals(-1, UnsignedInts.parseUnsignedInt(maxAsString, radix));
try {
// tests that we get exception whre an overflow would occur.
long overflow = 1L << 32;
String overflowAsString = Long.toString(overflow, radix);
int unused = UnsignedInts.parseUnsignedInt(overflowAsString, radix);
fail();
} catch (NumberFormatException expected) {
}
}
}
public void testJoin() {
assertEquals("", join());
assertEquals("1", join(1));
assertEquals("1,2", join(1, 2));
assertEquals("4294967295,2147483648", join(-1, Integer.MIN_VALUE));
assertEquals("123", UnsignedInts.join("", 1, 2, 3));
}
public void testCompare() {
for (long a : UNSIGNED_INTS) {
for (long b : UNSIGNED_INTS) {
int cmpAsLongs = Longs.compare(a, b);
int cmpAsUInt = UnsignedInts.compare((int) a, (int) b);
assertEquals(Integer.signum(cmpAsLongs), Integer.signum(cmpAsUInt));
}
}
}
@Override
public int compare(int[] left, int[] right) {
int minLength = Math.min(left.length, right.length);
for (int i = 0; i < minLength; i++) {
if (left[i] != right[i]) {
return UnsignedInts.compare(left[i], right[i]);
}
}
return left.length - right.length;
}
public void testDecodeInt() {
assertEquals(0xffffffff, UnsignedInts.decode("0xffffffff"));
assertEquals(01234567, UnsignedInts.decode("01234567")); // octal
assertEquals(0x12345678, UnsignedInts.decode("#12345678"));
assertEquals(76543210, UnsignedInts.decode("76543210"));
assertEquals(0x13579135, UnsignedInts.decode("0x13579135"));
assertEquals(0x13579135, UnsignedInts.decode("0X13579135"));
assertEquals(0, UnsignedInts.decode("0"));
}
public void testRemainder() {
for (long a : UNSIGNED_INTS) {
for (long b : UNSIGNED_INTS) {
try {
assertEquals((int) (a % b), UnsignedInts.remainder((int) a, (int) b));
assertFalse(b == 0);
} catch (ArithmeticException e) {
assertEquals(0, b);
}
}
}
}
public void testParseIntThrowsExceptionForInvalidRadix() {
// Valid radix values are Character.MIN_RADIX to Character.MAX_RADIX,
// inclusive.
try {
int unused = UnsignedInts.parseUnsignedInt("0", Character.MIN_RADIX - 1);
fail();
} catch (NumberFormatException expected) {
}
try {
int unused = UnsignedInts.parseUnsignedInt("0", Character.MAX_RADIX + 1);
fail();
} catch (NumberFormatException expected) {
}
// The radix is used as an array index, so try a negative value.
try {
int unused = UnsignedInts.parseUnsignedInt("0", -1);
fail();
} catch (NumberFormatException expected) {
}
}
public void testLexicographicalComparator() {
List<int[]> ordered =
Arrays.asList(
new int[] {},
new int[] {LEAST},
new int[] {LEAST, LEAST},
new int[] {LEAST, (int) 1L},
new int[] {(int) 1L},
new int[] {(int) 1L, LEAST},
new int[] {GREATEST, (GREATEST - (int) 1L)},
new int[] {GREATEST, GREATEST},
new int[] {GREATEST, GREATEST, GREATEST});
Comparator<int[]> comparator = UnsignedInts.lexicographicalComparator();
Helpers.testComparator(comparator, ordered);
}
private static int compare(
@NotNull final Buffer left,
long leftFrom,
final long leftLength,
@NotNull final Buffer right,
long rightFrom,
final long rightLength) {
assert leftLength > 0;
assert rightLength > 0;
// Adapted from Guava UnsignedBytes
long length = Math.min(leftLength, rightLength);
for (;
length >= Longs.BYTES;
leftFrom += Longs.BYTES, rightFrom += Longs.BYTES, length -= Longs.BYTES) {
final long lw = left.getLong(leftFrom);
final long rw = right.getLong(rightFrom);
if (lw != rw) {
return UnsignedLongs.compare(lw, rw);
}
}
if (length >= Ints.BYTES) {
final int lw = left.getInt(leftFrom);
final int rw = right.getInt(rightFrom);
if (lw != rw) {
return UnsignedInts.compare(lw, rw);
}
leftFrom += Ints.BYTES;
rightFrom += Ints.BYTES;
length -= Ints.BYTES;
}
for (; length > 0; leftFrom++, rightFrom++, length--) {
final int result = UnsignedBytes.compare(left.get(leftFrom), right.get(rightFrom));
if (result != 0) {
return result;
}
}
return (leftLength < rightLength) ? -1 : ((leftLength == rightLength) ? 0 : 1);
}
protected final int compare(int index1, int index2) {
final boolean n1 = nulls.get(index1);
final boolean n2 = nulls.get(index2);
if (n1 && n2) {
return 0;
}
if (n1 ^ n2) {
return nullsFirst ? (n1 ? -1 : 1) : (n1 ? 1 : -1);
}
int compare;
switch (type) {
case 0:
compare = Booleans.compare(booleans[index1], booleans[index2]);
break;
case 1:
compare = bits[index1] - bits[index2];
break;
case 2:
compare = Shorts.compare(shorts[index1], shorts[index2]);
break;
case 3:
compare = Ints.compare(ints[index1], ints[index2]);
break;
case 4:
compare = Longs.compare(longs[index1], longs[index2]);
break;
case 5:
compare = Floats.compare(floats[index1], floats[index2]);
break;
case 6:
compare = Doubles.compare(doubles[index1], doubles[index2]);
break;
case 7:
compare = TextDatum.COMPARATOR.compare(bytes[index1], bytes[index2]);
break;
case 8:
compare = UnsignedInts.compare(ints[index1], ints[index2]);
break;
default:
throw new IllegalArgumentException();
}
return ascending ? compare : -compare;
}
public void testParseInt() {
for (long a : UNSIGNED_INTS) {
assertEquals((int) a, UnsignedInts.parseUnsignedInt(Long.toString(a)));
}
}
public void testToLong() {
for (long a : UNSIGNED_INTS) {
assertEquals(a, UnsignedInts.toLong((int) a));
}
}
private static String join(int... values) {
return UnsignedInts.join(",", values);
}