def test_equality(self):
        """
        Two L{HashedEntry} instances compare equal if and only if they represent
        the same host and key in exactly the same way: the host salt, host hash,
        public key type, public key, and comment fields must all be equal.
        """
        hostSalt = b"gJbSEPBG9ZSBoZpHNtZBD1bHKBA"
        hostHash = b"bQv+0Xa0dByrwkA1EB0E7Xop/Fo"
        publicKey = Key.fromString(sampleKey)
        keyType = networkString(publicKey.type())
        comment = b"hello, world"

        entry = HashedEntry(
            hostSalt, hostHash, keyType, publicKey, comment)
        duplicate = HashedEntry(
            hostSalt, hostHash, keyType, publicKey, comment)

        # Vary the host salt
        self.assertNormalEqualityImplementation(
            entry, duplicate,
            HashedEntry(
                hostSalt[::-1], hostHash, keyType, publicKey,
                comment))

        # Vary the host hash
        self.assertNormalEqualityImplementation(
            entry, duplicate,
            HashedEntry(
                hostSalt, hostHash[::-1], keyType, publicKey,
                comment))

        # Vary the key type
        self.assertNormalEqualityImplementation(
            entry, duplicate,
            HashedEntry(
                hostSalt, hostHash, keyType[::-1], publicKey,
                comment))

        # Vary the key
        self.assertNormalEqualityImplementation(
            entry, duplicate,
            HashedEntry(
                hostSalt, hostHash, keyType,
                Key.fromString(otherSampleKey), comment))

        # Vary the comment
        self.assertNormalEqualityImplementation(
            entry, duplicate,
            HashedEntry(
                hostSalt, hostHash, keyType, publicKey,
                comment[::-1]))

        Two L{HashedEntry} instances compare equal if and only if they represent
        the same host and key in exactly the same way: the host salt, host hash,
        public key type, public key, and comment fields must all be equal.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/test/test_knownhosts.py