@Test
    void config_when_not_using_tls_context() {
        ZkClientConfigBuilder builder = new ZkClientConfigBuilder(null);
        ZKClientConfig config = builder.toConfig();
        assertEquals("false", config.getProperty(CLIENT_SECURE_PROPERTY));
        assertEquals("org.apache.zookeeper.ClientCnxnSocketNetty", config.getProperty(CLIENT_CONNECTION_SOCKET));
        assertNull(config.getProperty(SSL_CONTEXT_SUPPLIER_CLASS_PROPERTY));
        assertNull(config.getProperty(SSL_CLIENTAUTH_PROPERTY));
        assertNull(config.getProperty(SSL_CONTEXT_SUPPLIER_CLASS_PROPERTY));
    }
Tests the zookeeper client config builder.
zookeeper-client-common/src/test/java/com/yahoo/vespa/zookeeper/client/ZkClientConfigBuilderTest.java