private void check(Range rng, int a, int b) {
rng.set(a, b);
eq(rng, a, b);
eq(rng.limit(), rng.start + rng.length);
long backup = rng.backup();
rng.set(rnd(), rnd());
rng.restore(backup);
eq(rng, a, b);
}
@Test
public void shouldBackupAndRestore() {
Range range = new Range(10, 3);
eq(range, 10, 3);
long backup = range.backup();
range.set(7, 17);
eq(range, 7, 17);
range.restore(backup);
eq(range, 10, 3);
}
@Test
public void statisticalTest() {
Range rng = new Range();
isTrue(rng.isEmpty());
int[] borders = {Integer.MIN_VALUE, -1111, -1, 0, 1, 1111, Integer.MAX_VALUE};
for (int i = 0; i < borders.length; i++) {
for (int j = 0; j < borders.length; j++) {
check(rng, borders[i], borders[j]);
}
}
for (int i = 0; i < 1000000; i++) {
check(rng, rnd(), rnd());
}
}
protected void eq(String whole, Range range, String expected) {
eq(range.get(whole), expected);
}