/** test shuffling of short arrays */
@Test(timeout = 3600000)
public void testShortArrayShuffleDoesNotCrashAndDoesNotModifyUnrelatedContent() {
final Random rand;
short[] arrayA, arrayB;
int arrayLength, loopEnd, startIndex, count, arrayIndex, testLoop, testIndex;
rand = new Random();
for (arrayLength = 0; arrayLength <= 75; arrayLength++) {
arrayA = new short[arrayLength];
arrayB = new short[arrayLength];
for (arrayIndex = 0; arrayIndex < 5; arrayIndex++) {
for (count = arrayLength; (--count) >= 0; ) {
arrayA[count] = ((short) ((rand.nextInt() & 0xffff)));
}
for (startIndex = 0; startIndex < arrayLength; startIndex++) {
loopEnd = ((2 * arrayLength) + 5);
for (count = (-loopEnd); count <= loopEnd; count++) {
System.arraycopy(arrayA, 0, arrayB, 0, arrayLength);
Shuffle.shuffle(arrayB, startIndex, count, rand);
if ((count >= (-1)) && (count <= 1)) {
Assert.assertTrue(Arrays.equals(arrayA, arrayB));
} else {
if ((count > (-arrayLength)) && (count < arrayLength)) {
for (testLoop = (arrayLength - Math.abs(count)); (--testLoop) >= 0; ) {
if (count > 0) {
testIndex = (testLoop + startIndex + count);
} else {
testIndex = ((startIndex + count) - testLoop);
}
testIndex =
((((testIndex + arrayLength) % arrayLength) + arrayLength) % arrayLength);
Assert.assertEquals(
arrayA[testIndex], //
arrayB[testIndex]);
}
}
}
}
}
}
}
}
