/*
 * The MIT License
 * Copyright © 2014-2021 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.monostate;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.verifyZeroInteractions;
import static org.mockito.Mockito.when;

import org.junit.jupiter.api.Test;

/**
 * Date: 12/21/15 - 12:26 PM
 *
 * @author Jeroen Meulemeester
 */
public class LoadBalancerTest {

  @Test
  void testSameStateAmongstAllInstances() {
    final var firstBalancer = new LoadBalancer();
    final var secondBalancer = new LoadBalancer();
    firstBalancer.addServer(new Server("localhost", 8085, 6));
    // Both should have the same number of servers.
    assertEquals(firstBalancer.getNoOfServers(), secondBalancer.getNoOfServers());
    // Both Should have the same LastServedId
    assertEquals(firstBalancer.getLastServedId(), secondBalancer.getLastServedId());
  }

  @Test
  void testServe() {
    final var server = mock(Server.class);
    when(server.getHost()).thenReturn("testhost");
    when(server.getPort()).thenReturn(1234);
    doNothing().when(server).serve(any(Request.class));

    final var loadBalancer = new LoadBalancer();
    loadBalancer.addServer(server);

    verifyZeroInteractions(server);

    final var request = new Request("test");
    for (var i = 0; i < loadBalancer.getNoOfServers() * 2; i++) {
      loadBalancer.serverRequest(request);
    }

    verify(server, times(2)).serve(request);
    verifyNoMoreInteractions(server);

  }

}
