### Question:
Hints implements Serializable { public @Override boolean equals(Object o) { if (o == this) { return true; } if (!(o instanceof Hints)) { return false; } return hintsMap.equals(((Hints) o).hintsMap); } Hints();  Hints(@NonNull Hints orig); void set(String key, Serializable value); Optional<Serializable> get(final String key); boolean getBoolean(final String key); @Override String toString(); @Override boolean equals(Object o); Map<String, Serializable> getAll(); static Hints readOnly(); Hints readOnly(boolean ro); static boolean isRepoReadOnly(Hints hints); static Hints readWrite(); static Hints repository(@NonNull URI repoURI); Hints uri(URI repoURI); Hints platform(Platform platform); static final String OBJECTS_READ_ONLY; static final String REMOTES_READ_ONLY; static final String REPOSITORY_URL; static final String REPOSITORY_NAME; static final String PLATFORM; }### Answer:
@Test public void testEquals() { Hints hints1 = new Hints(); hints1.set("key1", "value1"); hints1.set("key2", "value2"); Hints hints2 = new Hints(); assertTrue(hints1.equals(hints1)); assertFalse(hints1.equals(hints2)); assertFalse(hints1.equals("hints")); assertFalse(hints2.equals(hints1)); hints2.set("key2", "value2"); hints2.set("key1", "value1"); assertTrue(hints1.equals(hints2)); assertTrue(hints2.equals(hints1)); }