### Question:
Arg { @Override public String toString() { return "Arg{" + "password=" + Arrays.toString(password) + ", checkBcryptHash='" + checkBcryptHash + '\'' + ", salt=" + Arrays.toString(salt) + ", costFactor=" + costFactor + '}'; } Arg();   Arg(char[] password, String checkBcryptHash);   Arg(char[] password, byte[] salt, int costFactor);   Arg(char[] password, String checkBcryptHash, byte[] salt, int costFactor); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString(); public char[] password; public String checkBcryptHash; public byte[] salt; public int costFactor; }### Answer:
@Test public void testToString() { assertNotNull(argCheck.toString()); assertNotNull(argHash.toString()); }