public void test_subclassing() throws Exception {
// http://b/2502231
// Ensure that Random's constructors call setSeed by emulating the active ingredient
// from the bug: the subclass' setSeed had a side-effect necessary for the correct
// functioning of next.
class MyRandom extends Random {
public String state;
public MyRandom() {
super();
}
public MyRandom(long l) {
super(l);
}
@Override
protected synchronized int next(int bits) {
return state.length();
}
@Override
public synchronized void setSeed(long seed) {
state = Long.toString(seed);
}
}
// Test the 0-argument constructor...
MyRandom r1 = new MyRandom();
r1.nextInt();
assertNotNull(r1.state);
// Test the 1-argument constructor...
MyRandom r2 = new MyRandom(123L);
r2.nextInt();
assertNotNull(r2.state);
}
