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BufferedImageHttpMessageConverterTests.java
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BufferedImageHttpMessageConverterTests.java
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/*
* Copyright 2002-2022 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;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.junit.jupiter.api.Test;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.MediaType;
import org.springframework.web.testfixture.http.MockHttpInputMessage;
import org.springframework.web.testfixture.http.MockHttpOutputMessage;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Unit tests for BufferedImageHttpMessageConverter.
*
* @author Arjen Poutsma
* @author Rossen Stoyanchev
*/
class BufferedImageHttpMessageConverterTests {
private final BufferedImageHttpMessageConverter converter = new BufferedImageHttpMessageConverter();
@Test
void canRead() {
assertThat(converter.canRead(BufferedImage.class, null)).as("Image not supported").isTrue();
assertThat(converter.canRead(BufferedImage.class, new MediaType("image", "png"))).as("Image not supported").isTrue();
}
@Test
void canWrite() {
assertThat(converter.canWrite(BufferedImage.class, null)).as("Image not supported").isTrue();
assertThat(converter.canWrite(BufferedImage.class, new MediaType("image", "png"))).as("Image not supported").isTrue();
assertThat(converter.canWrite(BufferedImage.class, new MediaType("*", "*"))).as("Image not supported").isTrue();
}
@Test
void read() throws IOException {
Resource logo = new ClassPathResource("logo.jpg", BufferedImageHttpMessageConverterTests.class);
MockHttpInputMessage inputMessage = new MockHttpInputMessage(logo.getInputStream());
inputMessage.getHeaders().setContentType(new MediaType("image", "jpeg"));
BufferedImage result = converter.read(BufferedImage.class, inputMessage);
assertThat(result.getHeight()).as("Invalid height").isEqualTo(500);
assertThat(result.getWidth()).as("Invalid width").isEqualTo(750);
}
@Test
void write() throws IOException {
Resource logo = new ClassPathResource("logo.jpg", BufferedImageHttpMessageConverterTests.class);
BufferedImage body = ImageIO.read(logo.getFile());
MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
MediaType contentType = new MediaType("image", "png");
converter.write(body, contentType, outputMessage);
assertThat(outputMessage.getHeaders().getContentType()).as("Invalid content type").isEqualTo(contentType);
assertThat(outputMessage.getBodyAsBytes().length > 0).as("Invalid size").isTrue();
BufferedImage result = ImageIO.read(new ByteArrayInputStream(outputMessage.getBodyAsBytes()));
assertThat(result.getHeight()).as("Invalid height").isEqualTo(500);
assertThat(result.getWidth()).as("Invalid width").isEqualTo(750);
}
@Test
void writeDefaultContentType() throws IOException {
Resource logo = new ClassPathResource("logo.jpg", BufferedImageHttpMessageConverterTests.class);
MediaType contentType = new MediaType("image", "png");
converter.setDefaultContentType(contentType);
BufferedImage body = ImageIO.read(logo.getFile());
MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
converter.write(body, new MediaType("*", "*"), outputMessage);
assertThat(outputMessage.getHeaders().getContentType()).as("Invalid content type").isEqualTo(contentType);
assertThat(outputMessage.getBodyAsBytes().length > 0).as("Invalid size").isTrue();
BufferedImage result = ImageIO.read(new ByteArrayInputStream(outputMessage.getBodyAsBytes()));
assertThat(result.getHeight()).as("Invalid height").isEqualTo(500);
assertThat(result.getWidth()).as("Invalid width").isEqualTo(750);
}
}