/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed 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.
 */

package org.springframework.test.web.servlet.samples.context;

import java.util.Collections;
import java.util.Map;
import java.util.concurrent.Callable;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import org.mockito.Mockito;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.ContextHierarchy;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.request.async.CallableProcessingInterceptor;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import static org.mockito.Matchers.any;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.asyncDispatch;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.request;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

/**
 * Tests with Java configuration.
 *
 * @author Rossen Stoyanchev
 * @author Sam Brannen
 */
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextHierarchy(@ContextConfiguration(classes = AsyncControllerJavaConfigTests.WebConfig.class))
public class AsyncControllerJavaConfigTests {

	@Autowired
	private WebApplicationContext wac;

	@Autowired
	private CallableProcessingInterceptor callableInterceptor;

	private MockMvc mockMvc;


	@Before
	public void setup() {
		this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
	}

	// SPR-13615

	@Test
	public void callableInterceptor() throws Exception {
		MvcResult mvcResult = this.mockMvc.perform(get("/callable").accept(MediaType.APPLICATION_JSON))
				.andExpect(status().isOk())
				.andExpect(request().asyncStarted())
				.andExpect(request().asyncResult(Collections.singletonMap("key", "value")))
				.andReturn();

		Mockito.verify(this.callableInterceptor).beforeConcurrentHandling(any(), any());
		Mockito.verify(this.callableInterceptor).preProcess(any(), any());
		Mockito.verify(this.callableInterceptor).postProcess(any(), any(), any());
		Mockito.verifyNoMoreInteractions(this.callableInterceptor);

		this.mockMvc.perform(asyncDispatch(mvcResult))
				.andExpect(status().isOk())
				.andExpect(content().string("{\"key\":\"value\"}"));

		Mockito.verify(this.callableInterceptor).afterCompletion(any(), any());
		Mockito.verifyNoMoreInteractions(this.callableInterceptor);
	}


	@Configuration
	@EnableWebMvc
	static class WebConfig extends WebMvcConfigurerAdapter {

		@Override
		public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
			configurer.registerCallableInterceptors(callableInterceptor());
		}

		@Bean
		public CallableProcessingInterceptor callableInterceptor() {
			return Mockito.mock(CallableProcessingInterceptor.class);
		}

		@Bean
		public AsyncController asyncController() {
			return new AsyncController();
		}

	}

	@RestController
	static class AsyncController {

		@GetMapping("/callable")
		public Callable<Map<String, String>> getCallable() {
			return () -> Collections.singletonMap("key", "value");
		}
	}

}
