/*
 * Copyright 2002-2017 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.http.codec.xml;

import java.nio.charset.StandardCharsets;
import java.util.Collections;

import org.junit.Test;
import reactor.core.publisher.Flux;
import reactor.test.StepVerifier;

import org.springframework.core.ResolvableType;
import org.springframework.core.io.buffer.AbstractDataBufferAllocatingTestCase;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.core.io.buffer.support.DataBufferTestUtils;
import org.springframework.http.MediaType;
import org.springframework.http.codec.Pojo;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.xmlunit.matchers.CompareMatcher.isSimilarTo;

/**
 * @author Sebastien Deleuze
 * @author Arjen Poutsma
 */
public class Jaxb2XmlEncoderTests extends AbstractDataBufferAllocatingTestCase {

	private final Jaxb2XmlEncoder encoder = new Jaxb2XmlEncoder();


	@Test
	public void canEncode() {
		assertTrue(this.encoder.canEncode(ResolvableType.forClass(Pojo.class),
				MediaType.APPLICATION_XML));
		assertTrue(this.encoder.canEncode(ResolvableType.forClass(Pojo.class),
				MediaType.TEXT_XML));
		assertFalse(this.encoder.canEncode(ResolvableType.forClass(Pojo.class),
				MediaType.APPLICATION_JSON));

		assertTrue(this.encoder.canEncode(
				ResolvableType.forClass(Jaxb2XmlDecoderTests.TypePojo.class),
				MediaType.APPLICATION_XML));

		assertFalse(this.encoder.canEncode(ResolvableType.forClass(getClass()),
				MediaType.APPLICATION_XML));

		// SPR-15464
		assertFalse(this.encoder.canEncode(ResolvableType.NONE, null));
	}

	@Test
	public void encode() throws Exception {
		Flux<Pojo> source = Flux.just(new Pojo("foofoo", "barbar"), new Pojo("foofoofoo", "barbarbar"));
		Flux<DataBuffer> output = this.encoder.encode(source, this.bufferFactory,
				ResolvableType.forClass(Pojo.class),
				MediaType.APPLICATION_XML, Collections.emptyMap());

		StepVerifier.create(output)
				.consumeNextWith(dataBuffer -> {
					try {
						String s = DataBufferTestUtils
								.dumpString(dataBuffer, StandardCharsets.UTF_8);
						assertThat(s, isSimilarTo("<?xml version='1.0' encoding='UTF-8' standalone='yes'?>" +
								"<pojo><bar>barbar</bar><foo>foofoo</foo></pojo>"));
					}
					finally {
						DataBufferUtils.release(dataBuffer);
					}
				})
				.expectComplete()
				.verify();
	}

}