/*
 * Copyright 2013-2020 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
 *
 *      https://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.cloud.gateway.filter.factory;

import org.junit.jupiter.api.Test;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.RequestSizeGatewayFilterFactory.RequestSizeConfig;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.cloud.gateway.test.BaseWebClientTests;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Import;
import org.springframework.http.HttpStatus;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.util.unit.DataSize;

import static org.assertj.core.api.Assertions.assertThat;
import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;

/**
 * @author Arpan Das
 */

@SpringBootTest(webEnvironment = RANDOM_PORT)
@DirtiesContext
public class RequestSizeGatewayFilterFactoryTest extends BaseWebClientTests {

	private static final String responseMesssage = "Request size is larger than permissible limit. Request size is . . "
			+ "where permissible limit is .*";

	@Test
	public void setRequestSizeFilterWorks() {
		testClient.post().uri("/post").header("Host", "www.setrequestsize.org").header("content-length", "6")
				.bodyValue("123456").exchange().expectStatus().isEqualTo(HttpStatus.PAYLOAD_TOO_LARGE).expectHeader()
				.valueMatches("errorMessage", responseMesssage);
	}

	@Test
	public void toStringFormat() {
		RequestSizeConfig config = new RequestSizeConfig();
		config.setMaxSize(DataSize.ofBytes(1000L));
		GatewayFilter filter = new RequestSizeGatewayFilterFactory().apply(config);
		assertThat(filter.toString()).contains("max").contains("1000");
	}

	@EnableAutoConfiguration
	@SpringBootConfiguration
	@Import(DefaultTestConfig.class)
	public static class TestConfig {

		@Value("${test.uri}")
		String uri;

		@Bean
		public RouteLocator testRouteLocator(RouteLocatorBuilder builder) {
			return builder.routes()
					.route("test_request_size",
							r -> r.order(-1).host("**.setrequestsize.org").filters(f -> f.setRequestSize(5L)).uri(uri))
					.build();
		}

	}

}
