assertEquals(f1, test.getRandomString(key1));
assertEquals(f2, test.getRandomString(key2));
assertEquals(f1, test.getRandomString(key1));
assertEquals(f2, test.getRandomString(key2));
test.updateRandomString(key1);
test.updateRandomString(key2);
final String s1 = test.getRandomString(key1);
final String s2 = test.getRandomString(key2);