/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package org.apache.hc.core5.websocket;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;

import java.util.Collections;
import java.util.concurrent.atomic.AtomicInteger;

import org.junit.jupiter.api.Test;

class WebSocketExtensionNegotiationTest {

    @Test
    void formatsResponseHeader() {
        final WebSocketExtensionData data = new WebSocketExtensionData(
                "permessage-deflate", Collections.singletonMap("client_max_window_bits", "12"));
        final WebSocketExtensionNegotiation negotiation = new WebSocketExtensionNegotiation(
                Collections.emptyList(),
                Collections.singletonList(data));
        assertEquals("permessage-deflate; client_max_window_bits=12", negotiation.formatResponseHeader());
    }

    @Test
    void formatsEmptyHeaderAsNull() {
        final WebSocketExtensionNegotiation negotiation = new WebSocketExtensionNegotiation(
                Collections.emptyList(), Collections.emptyList());
        assertNull(negotiation.formatResponseHeader());
    }

    @Test
    void closeIsIdempotentAndClosesEachExtensionOnce() {
        final AtomicInteger closed = new AtomicInteger();
        final WebSocketExtension extension = new WebSocketExtension() {
            @Override
            public String getName() {
                return "x-test";
            }

            @Override
            public void close() {
                closed.incrementAndGet();
            }
        };
        final WebSocketExtensionNegotiation negotiation = new WebSocketExtensionNegotiation(
                Collections.singletonList(extension), Collections.emptyList());

        negotiation.close();
        negotiation.close();

        assertEquals(1, closed.get(), "each extension must be closed exactly once");
    }
}
