/*
 * Copyright 2002-2019 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.http.converter.xml;

import javax.xml.transform.Result;
import javax.xml.transform.stream.StreamSource;

import org.junit.jupiter.api.Test;

import org.springframework.beans.TypeMismatchException;
import org.springframework.http.MediaType;
import org.springframework.http.MockHttpInputMessage;
import org.springframework.http.MockHttpOutputMessage;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.oxm.Marshaller;
import org.springframework.oxm.MarshallingFailureException;
import org.springframework.oxm.Unmarshaller;
import org.springframework.oxm.UnmarshallingFailureException;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.ArgumentMatchers.isA;
import static org.mockito.BDDMockito.given;
import static org.mockito.BDDMockito.willDoNothing;
import static org.mockito.BDDMockito.willThrow;
import static org.mockito.Mockito.mock;

/**
 * Tests for {@link MarshallingHttpMessageConverter}.
 *
 * @author Arjen Poutsma
 */
public class MarshallingHttpMessageConverterTests {

	@Test
	public void canRead() {
		Unmarshaller unmarshaller = mock(Unmarshaller.class);

		given(unmarshaller.supports(Integer.class)).willReturn(false);
		given(unmarshaller.supports(String.class)).willReturn(true);

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter();
		converter.setUnmarshaller(unmarshaller);

		assertThat(converter.canRead(Boolean.class, MediaType.TEXT_PLAIN)).isFalse();
		assertThat(converter.canRead(Integer.class, MediaType.TEXT_XML)).isFalse();
		assertThat(converter.canRead(String.class, MediaType.TEXT_XML)).isTrue();
	}

	@Test
	public void canWrite() {
		Marshaller marshaller = mock(Marshaller.class);

		given(marshaller.supports(Integer.class)).willReturn(false);
		given(marshaller.supports(String.class)).willReturn(true);

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter();
		converter.setMarshaller(marshaller);

		assertThat(converter.canWrite(Boolean.class, MediaType.TEXT_PLAIN)).isFalse();
		assertThat(converter.canWrite(Integer.class, MediaType.TEXT_XML)).isFalse();
		assertThat(converter.canWrite(String.class, MediaType.TEXT_XML)).isTrue();
	}

	@Test
	public void read() throws Exception {
		String body = "<root>Hello World</root>";
		MockHttpInputMessage inputMessage = new MockHttpInputMessage(body.getBytes("UTF-8"));

		Unmarshaller unmarshaller = mock(Unmarshaller.class);
		given(unmarshaller.unmarshal(isA(StreamSource.class))).willReturn(body);

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter();
		converter.setUnmarshaller(unmarshaller);

		String result = (String) converter.read(Object.class, inputMessage);
		assertThat(result).as("Invalid result").isEqualTo(body);
	}

	@Test
	public void readWithTypeMismatchException() throws Exception {
		MockHttpInputMessage inputMessage = new MockHttpInputMessage(new byte[0]);

		Marshaller marshaller = mock(Marshaller.class);
		Unmarshaller unmarshaller = mock(Unmarshaller.class);
		given(unmarshaller.unmarshal(isA(StreamSource.class))).willReturn(Integer.valueOf(3));

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter(marshaller, unmarshaller);
		assertThatExceptionOfType(HttpMessageNotReadableException.class).isThrownBy(() ->
				converter.read(String.class, inputMessage))
			.withCauseInstanceOf(TypeMismatchException.class);
	}

	@Test
	public void readWithMarshallingFailureException() throws Exception {
		MockHttpInputMessage inputMessage = new MockHttpInputMessage(new byte[0]);
		UnmarshallingFailureException ex = new UnmarshallingFailureException("forced");

		Unmarshaller unmarshaller = mock(Unmarshaller.class);
		given(unmarshaller.unmarshal(isA(StreamSource.class))).willThrow(ex);

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter();
		converter.setUnmarshaller(unmarshaller);

		assertThatExceptionOfType(HttpMessageNotReadableException.class).isThrownBy(() ->
				converter.read(Object.class, inputMessage))
			.withCause(ex);
	}

	@Test
	public void write() throws Exception {
		String body = "<root>Hello World</root>";
		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();

		Marshaller marshaller = mock(Marshaller.class);
		willDoNothing().given(marshaller).marshal(eq(body), isA(Result.class));

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter(marshaller);
		converter.write(body, null, outputMessage);

		assertThat(outputMessage.getHeaders().getContentType()).as("Invalid content-type").isEqualTo(new MediaType("application", "xml"));
	}

	@Test
	public void writeWithMarshallingFailureException() throws Exception {
		String body = "<root>Hello World</root>";
		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
		MarshallingFailureException ex = new MarshallingFailureException("forced");

		Marshaller marshaller = mock(Marshaller.class);
		willThrow(ex).given(marshaller).marshal(eq(body), isA(Result.class));

		MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter(marshaller);
		assertThatExceptionOfType(HttpMessageNotWritableException.class).isThrownBy(() ->
				converter.write(body, null, outputMessage))
			.withCause(ex);
	}

	@Test
	public void supports() throws Exception {
		assertThatExceptionOfType(UnsupportedOperationException.class).isThrownBy(() ->
				new MarshallingHttpMessageConverter().supports(Object.class));
	}
}
