### Question:
PasswordStore { public boolean authenticate(String user, String password) { return cache.getUnchecked(new Credential(user, password)); } PasswordStore(File file, int cacheMaxSize); @VisibleForTesting  PasswordStore(List<String> lines, int cacheMaxSize); boolean authenticate(String user, String password);  }### Answer:
@Test public void testAuthenticate() { PasswordStore store = createStore("userbcrypt:" + BCRYPT_PASSWORD, "userpbkdf2:" + PBKDF2_PASSWORD); assertTrue(store.authenticate("userbcrypt", "user123")); assertFalse(store.authenticate("userbcrypt", "user999")); assertFalse(store.authenticate("userbcrypt", "password")); assertTrue(store.authenticate("userpbkdf2", "password")); assertFalse(store.authenticate("userpbkdf2", "password999")); assertFalse(store.authenticate("userpbkdf2", "user123")); assertFalse(store.authenticate("baduser", "user123")); assertFalse(store.authenticate("baduser", "password")); }