// Test some basic stuff; add a few keys, remove a few keys
public void testBasic() {
assertTrue(_nbhm.isEmpty());
assertThat(_nbhm.putIfAbsent("k1", "v1"), nullValue());
checkSizes(1);
assertThat(_nbhm.putIfAbsent("k2", "v2"), nullValue());
checkSizes(2);
assertTrue(_nbhm.containsKey("k2"));
assertThat(_nbhm.put("k1", "v1a"), is("v1"));
assertThat(_nbhm.put("k2", "v2a"), is("v2"));
checkSizes(2);
assertThat(_nbhm.putIfAbsent("k2", "v2b"), is("v2a"));
assertThat(_nbhm.remove("k1"), is("v1a"));
assertFalse(_nbhm.containsKey("k1"));
checkSizes(1);
assertThat(_nbhm.remove("k1"), nullValue());
assertThat(_nbhm.remove("k2"), is("v2a"));
checkSizes(0);
assertThat(_nbhm.remove("k2"), nullValue());
assertThat(_nbhm.remove("k3"), nullValue());
assertTrue(_nbhm.isEmpty());
assertThat(_nbhm.put("k0", "v0"), nullValue());
assertTrue(_nbhm.containsKey("k0"));
checkSizes(1);
assertThat(_nbhm.remove("k0"), is("v0"));
assertFalse(_nbhm.containsKey("k0"));
checkSizes(0);
assertThat(_nbhm.replace("k0", "v0"), nullValue());
assertFalse(_nbhm.containsKey("k0"));
assertThat(_nbhm.put("k0", "v0"), nullValue());
assertEquals(_nbhm.replace("k0", "v0a"), "v0");
assertEquals(_nbhm.get("k0"), "v0a");
assertThat(_nbhm.remove("k0"), is("v0a"));
assertFalse(_nbhm.containsKey("k0"));
checkSizes(0);
assertThat(_nbhm.replace("k1", "v1"), nullValue());
assertFalse(_nbhm.containsKey("k1"));
assertThat(_nbhm.put("k1", "v1"), nullValue());
assertEquals(_nbhm.replace("k1", "v1a"), "v1");
assertEquals(_nbhm.get("k1"), "v1a");
assertThat(_nbhm.remove("k1"), is("v1a"));
assertFalse(_nbhm.containsKey("k1"));
checkSizes(0);
// Insert & Remove KeyBonks until the table resizes and we start
// finding Tombstone keys- and KeyBonk's equals-call with throw a
// ClassCastException if it sees a non-KeyBonk.
NonBlockingIdentityHashMap<KeyBonk, String> dumb =
new NonBlockingIdentityHashMap<KeyBonk, String>();
for (int i = 0; i < 10000; i++) {
final KeyBonk happy1 = new KeyBonk(i);
assertThat(dumb.put(happy1, "and"), nullValue());
if ((i & 1) == 0) dumb.remove(happy1);
final KeyBonk happy2 = new KeyBonk(i); // 'equals' but not '=='
dumb.get(happy2);
}
}
void work_helper(
NonBlockingIdentityHashMap<String, String> nbhm, String thrd, int d, String[] keys) {
final int ITERS = 20000;
for (int j = 0; j < 10; j++) {
long start = System.nanoTime();
for (int i = d; i < ITERS; i += 2)
assertThat(
"this key not in there, so putIfAbsent must work",
nbhm.putIfAbsent(keys[i], thrd),
is((String) null));
for (int i = d; i < ITERS; i += 2) assertTrue(nbhm.remove(keys[i], thrd));
double delta_nanos = System.nanoTime() - start;
double delta_secs = delta_nanos / 1000000000.0;
double ops = ITERS * 2;
// System.out.println("Thrd"+thrd+" "+(ops/delta_secs)+" ops/sec size="+nbhm.size());
}
}
public void testIterationBig() {
final int CNT = 10000;
String[] keys = new String[CNT];
String[] vals = new String[CNT];
assertThat(_nbhm.size(), is(0));
for (int i = 0; i < CNT; i++) _nbhm.put(keys[i] = ("k" + i), vals[i] = ("v" + i));
assertThat(_nbhm.size(), is(CNT));
int sz = 0;
int sum = 0;
for (String s : _nbhm.keySet()) {
sz++;
assertThat("", s.charAt(0), is('k'));
int x = Integer.parseInt(s.substring(1));
sum += x;
assertTrue(x >= 0 && x <= (CNT - 1));
}
assertThat("Found 10000 ints", sz, is(CNT));
assertThat("Found all integers in list", sum, is(CNT * (CNT - 1) / 2));
assertThat("can remove 3", _nbhm.remove(keys[3]), is(vals[3]));
assertThat("can remove 4", _nbhm.remove(keys[4]), is(vals[4]));
sz = 0;
sum = 0;
for (String s : _nbhm.keySet()) {
sz++;
assertThat("", s.charAt(0), is('k'));
int x = Integer.parseInt(s.substring(1));
sum += x;
assertTrue(x >= 0 && x <= (CNT - 1));
String v = _nbhm.get(s);
assertThat("", v.charAt(0), is('v'));
assertThat("", s.substring(1), is(v.substring(1)));
}
assertThat("Found " + (CNT - 2) + " ints", sz, is(CNT - 2));
assertThat("Found all integers in list", sum, is(CNT * (CNT - 1) / 2 - (3 + 4)));
}