/*
    * Copyright (C) 2019, Google LLC. and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  package org.eclipse.jgit.transport;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.util.Arrays;
  
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  @RunWith(JUnit4.class)
  public class ProtocolV2HookChainTest {
  
  	@Test
  	public void testDefaultIfEmpty() {
  		ProtocolV2Hook[] noHooks = {};
  		ProtocolV2Hook newChain = ProtocolV2HookChain
  				.newChain(Arrays.asList(noHooks));
  		assertEquals(newChain, ProtocolV2Hook.DEFAULT);
  	}
  
  	@Test
  	public void testFlattenChainIfOnlyOne() {
  		FakeProtocolV2Hook hook1 = new FakeProtocolV2Hook();
  		ProtocolV2Hook newChain = ProtocolV2HookChain
  				.newChain(Arrays.asList(ProtocolV2Hook.DEFAULT, hook1));
  		assertEquals(newChain, hook1);
  	}
  
  	@Test
  	public void testMultipleHooks() throws ServiceMayNotContinueException {
  		FakeProtocolV2Hook hook1 = new FakeProtocolV2Hook();
  		FakeProtocolV2Hook hook2 = new FakeProtocolV2Hook();
  
  		ProtocolV2Hook chained = ProtocolV2HookChain
  				.newChain(Arrays.asList(hook1, hook2));
  		chained.onLsRefs(LsRefsV2Request.builder().build());
  
  		assertTrue(hook1.wasInvoked());
  		assertTrue(hook2.wasInvoked());
  	}
  
  	private static final class FakeProtocolV2Hook implements ProtocolV2Hook {
  		boolean invoked;
  
  		@Override
  		public void onLsRefs(LsRefsV2Request req)
  				throws ServiceMayNotContinueException {
  			invoked = true;
  		}
  
  		@Override
  		public void onCapabilities(CapabilitiesV2Request req)
  				throws ServiceMayNotContinueException {
  			throw new UnsupportedOperationException();
  		}
  
  		@Override
  		public void onFetch(FetchV2Request req)
  				throws ServiceMayNotContinueException {
  			throw new UnsupportedOperationException();
  		}
  
  		public boolean wasInvoked() {
  			return invoked;
  		}
  	}
  }