/
ClientCodecConfigurerTests.java
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/
ClientCodecConfigurerTests.java
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/*
* 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.codec.support;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import org.junit.jupiter.api.Test;
import reactor.core.publisher.Flux;
import org.springframework.core.ResolvableType;
import org.springframework.core.codec.ByteArrayDecoder;
import org.springframework.core.codec.ByteArrayEncoder;
import org.springframework.core.codec.ByteBufferDecoder;
import org.springframework.core.codec.ByteBufferEncoder;
import org.springframework.core.codec.CharSequenceEncoder;
import org.springframework.core.codec.DataBufferDecoder;
import org.springframework.core.codec.DataBufferEncoder;
import org.springframework.core.codec.Decoder;
import org.springframework.core.codec.Encoder;
import org.springframework.core.codec.StringDecoder;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import org.springframework.http.MediaType;
import org.springframework.http.codec.ClientCodecConfigurer;
import org.springframework.http.codec.DecoderHttpMessageReader;
import org.springframework.http.codec.EncoderHttpMessageWriter;
import org.springframework.http.codec.FormHttpMessageReader;
import org.springframework.http.codec.HttpMessageReader;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.http.codec.ResourceHttpMessageReader;
import org.springframework.http.codec.ResourceHttpMessageWriter;
import org.springframework.http.codec.ServerSentEventHttpMessageReader;
import org.springframework.http.codec.json.Jackson2JsonDecoder;
import org.springframework.http.codec.json.Jackson2JsonEncoder;
import org.springframework.http.codec.json.Jackson2SmileDecoder;
import org.springframework.http.codec.json.Jackson2SmileEncoder;
import org.springframework.http.codec.multipart.MultipartHttpMessageWriter;
import org.springframework.http.codec.protobuf.ProtobufDecoder;
import org.springframework.http.codec.protobuf.ProtobufHttpMessageWriter;
import org.springframework.http.codec.xml.Jaxb2XmlDecoder;
import org.springframework.http.codec.xml.Jaxb2XmlEncoder;
import org.springframework.util.MimeTypeUtils;
import static org.assertj.core.api.Assertions.assertThat;
import static org.springframework.core.ResolvableType.forClass;
/**
* Unit tests for {@link ClientCodecConfigurer}.
*
* @author Rossen Stoyanchev
*/
public class ClientCodecConfigurerTests {
private final ClientCodecConfigurer configurer = new DefaultClientCodecConfigurer();
private final AtomicInteger index = new AtomicInteger(0);
@Test
public void defaultReaders() {
List<HttpMessageReader<?>> readers = this.configurer.getReaders();
assertThat(readers.size()).isEqualTo(12);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(ByteArrayDecoder.class);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(ByteBufferDecoder.class);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(DataBufferDecoder.class);
assertThat(readers.get(this.index.getAndIncrement()).getClass()).isEqualTo(ResourceHttpMessageReader.class);
assertStringDecoder(getNextDecoder(readers), true);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(ProtobufDecoder.class);
// SPR-16804
assertThat(readers.get(this.index.getAndIncrement()).getClass()).isEqualTo(FormHttpMessageReader.class);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(Jackson2JsonDecoder.class);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(Jackson2SmileDecoder.class);
assertThat(getNextDecoder(readers).getClass()).isEqualTo(Jaxb2XmlDecoder.class);
assertSseReader(readers);
assertStringDecoder(getNextDecoder(readers), false);
}
@Test
public void defaultWriters() {
List<HttpMessageWriter<?>> writers = this.configurer.getWriters();
assertThat(writers.size()).isEqualTo(11);
assertThat(getNextEncoder(writers).getClass()).isEqualTo(ByteArrayEncoder.class);
assertThat(getNextEncoder(writers).getClass()).isEqualTo(ByteBufferEncoder.class);
assertThat(getNextEncoder(writers).getClass()).isEqualTo(DataBufferEncoder.class);
assertThat(writers.get(index.getAndIncrement()).getClass()).isEqualTo(ResourceHttpMessageWriter.class);
assertStringEncoder(getNextEncoder(writers), true);
assertThat(writers.get(this.index.getAndIncrement()).getClass()).isEqualTo(MultipartHttpMessageWriter.class);
assertThat(writers.get(index.getAndIncrement()).getClass()).isEqualTo(ProtobufHttpMessageWriter.class);
assertThat(getNextEncoder(writers).getClass()).isEqualTo(Jackson2JsonEncoder.class);
assertThat(getNextEncoder(writers).getClass()).isEqualTo(Jackson2SmileEncoder.class);
assertThat(getNextEncoder(writers).getClass()).isEqualTo(Jaxb2XmlEncoder.class);
assertStringEncoder(getNextEncoder(writers), false);
}
@Test
public void jackson2EncoderOverride() {
Jackson2JsonDecoder decoder = new Jackson2JsonDecoder();
this.configurer.defaultCodecs().jackson2JsonDecoder(decoder);
assertThat(this.configurer.getReaders().stream()
.filter(reader -> ServerSentEventHttpMessageReader.class.equals(reader.getClass()))
.map(reader -> (ServerSentEventHttpMessageReader) reader)
.findFirst()
.map(ServerSentEventHttpMessageReader::getDecoder)
.filter(e -> e == decoder).orElse(null)).isSameAs(decoder);
}
@Test
public void cloneConfigurer() {
ClientCodecConfigurer clone = this.configurer.clone();
Jackson2JsonDecoder jackson2Decoder = new Jackson2JsonDecoder();
clone.defaultCodecs().serverSentEventDecoder(jackson2Decoder);
clone.defaultCodecs().multipartCodecs().encoder(new Jackson2SmileEncoder());
clone.defaultCodecs().multipartCodecs().writer(new ResourceHttpMessageWriter());
// Clone has the customizations
Decoder<?> sseDecoder = clone.getReaders().stream()
.filter(reader -> reader instanceof ServerSentEventHttpMessageReader)
.map(reader -> ((ServerSentEventHttpMessageReader) reader).getDecoder())
.findFirst()
.get();
List<HttpMessageWriter<?>> multipartWriters = clone.getWriters().stream()
.filter(writer -> writer instanceof MultipartHttpMessageWriter)
.flatMap(writer -> ((MultipartHttpMessageWriter) writer).getPartWriters().stream())
.collect(Collectors.toList());
assertThat(sseDecoder).isSameAs(jackson2Decoder);
assertThat(multipartWriters).hasSize(2);
// Original does not have the customizations
sseDecoder = this.configurer.getReaders().stream()
.filter(reader -> reader instanceof ServerSentEventHttpMessageReader)
.map(reader -> ((ServerSentEventHttpMessageReader) reader).getDecoder())
.findFirst()
.get();
multipartWriters = this.configurer.getWriters().stream()
.filter(writer -> writer instanceof MultipartHttpMessageWriter)
.flatMap(writer -> ((MultipartHttpMessageWriter) writer).getPartWriters().stream())
.collect(Collectors.toList());
assertThat(sseDecoder).isNotSameAs(jackson2Decoder);
assertThat(multipartWriters).hasSize(10);
}
private Decoder<?> getNextDecoder(List<HttpMessageReader<?>> readers) {
HttpMessageReader<?> reader = readers.get(this.index.getAndIncrement());
assertThat(reader.getClass()).isEqualTo(DecoderHttpMessageReader.class);
return ((DecoderHttpMessageReader<?>) reader).getDecoder();
}
private Encoder<?> getNextEncoder(List<HttpMessageWriter<?>> writers) {
HttpMessageWriter<?> writer = writers.get(this.index.getAndIncrement());
assertThat(writer.getClass()).isEqualTo(EncoderHttpMessageWriter.class);
return ((EncoderHttpMessageWriter<?>) writer).getEncoder();
}
@SuppressWarnings("unchecked")
private void assertStringDecoder(Decoder<?> decoder, boolean textOnly) {
assertThat(decoder.getClass()).isEqualTo(StringDecoder.class);
assertThat(decoder.canDecode(forClass(String.class), MimeTypeUtils.TEXT_PLAIN)).isTrue();
Object expected = !textOnly;
assertThat(decoder.canDecode(forClass(String.class), MediaType.TEXT_EVENT_STREAM)).isEqualTo(expected);
Flux<String> decoded = (Flux<String>) decoder.decode(
Flux.just(new DefaultDataBufferFactory().wrap("line1\nline2".getBytes(StandardCharsets.UTF_8))),
ResolvableType.forClass(String.class), MimeTypeUtils.TEXT_PLAIN, Collections.emptyMap());
assertThat(decoded.collectList().block(Duration.ZERO)).isEqualTo(Arrays.asList("line1", "line2"));
}
private void assertStringEncoder(Encoder<?> encoder, boolean textOnly) {
assertThat(encoder.getClass()).isEqualTo(CharSequenceEncoder.class);
assertThat(encoder.canEncode(forClass(String.class), MimeTypeUtils.TEXT_PLAIN)).isTrue();
Object expected = !textOnly;
assertThat(encoder.canEncode(forClass(String.class), MediaType.TEXT_EVENT_STREAM)).isEqualTo(expected);
}
private void assertSseReader(List<HttpMessageReader<?>> readers) {
HttpMessageReader<?> reader = readers.get(this.index.getAndIncrement());
assertThat(reader.getClass()).isEqualTo(ServerSentEventHttpMessageReader.class);
Decoder<?> decoder = ((ServerSentEventHttpMessageReader) reader).getDecoder();
assertThat(decoder).isNotNull();
assertThat(decoder.getClass()).isEqualTo(Jackson2JsonDecoder.class);
}
}