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Add FormEvent stream event test 

Add sample that shows how FormEvents can be used to create a form
submit from a stream of key/value pairs.

See gh-30131
This commit is contained in:
Arjen Poutsma 2023-10-10 14:05:34 +02:00
parent 298d6e4db0
commit faaf3a61f2
1 changed files with 43 additions and 1 deletions
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44
spring-web/src/test/java/org/springframework/http/codec/multipart/PartEventHttpMessageWriterTests.java
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@ -1,5 +1,5 @@
/* /*
* Copyright 2002-2022 the original author or authors. * Copyright 2002-2023 the original author or authors.
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -18,7 +18,9 @@ package org.springframework.http.codec.multipart;
import java.nio.charset.StandardCharsets; import java.nio.charset.StandardCharsets;
import java.time.Duration; import java.time.Duration;
import java.util.AbstractMap;
import java.util.Collections; import java.util.Collections;
import java.util.List;
import java.util.Map; import java.util.Map;
import org.junit.jupiter.api.Test; import org.junit.jupiter.api.Test;
@ -93,6 +95,46 @@ public class PartEventHttpMessageWriterTests extends AbstractLeakCheckingTests {
assertThat(decodeToString(part)).isEqualTo("AaBbCc"); assertThat(decodeToString(part)).isEqualTo("AaBbCc");
} }
@Test
void writeFormEventStream() {
Flux<Map.Entry<String, String>> body = Flux.just(
new AbstractMap.SimpleEntry<>("name 1", "value 1"),
new AbstractMap.SimpleEntry<>("name 2", "value 2+1"),
new AbstractMap.SimpleEntry<>("name 2", "value 2+2")
);
Flux<PartEvent> partEvents = body
.concatMap(entry -> FormPartEvent.create(entry.getKey(), entry.getValue()));
Map<String, Object> hints = Collections.emptyMap();
this.writer.write(partEvents, null, MediaType.MULTIPART_FORM_DATA, this.response, hints)
.block(Duration.ofSeconds(5));
MultiValueMap<String, Part> requestParts = parse(this.response, hints);
assertThat(requestParts).hasSize(2);
Part part = requestParts.getFirst("name 1");
assertThat(part.name()).isEqualTo("name 1");
assertThat(part.headers().getContentType().isCompatibleWith(MediaType.TEXT_PLAIN)).isTrue();
String value = decodeToString(part);
assertThat(value).isEqualTo("value 1");
List<Part> parts = requestParts.get("name 2");
assertThat(parts).hasSize(2);
part = parts.get(0);
assertThat(part.name()).isEqualTo("name 2");
assertThat(part.headers().getContentType().isCompatibleWith(MediaType.TEXT_PLAIN)).isTrue();
value = decodeToString(part);
assertThat(value).isEqualTo("value 2+1");
part = parts.get(1);
assertThat(part.name()).isEqualTo("name 2");
assertThat(part.headers().getContentType().isCompatibleWith(MediaType.TEXT_PLAIN)).isTrue();
value = decodeToString(part);
assertThat(value).isEqualTo("value 2+2");
}
@SuppressWarnings("ConstantConditions") @SuppressWarnings("ConstantConditions")
private String decodeToString(Part part) { private String decodeToString(Part part) {
return StringDecoder.textPlainOnly().decodeToMono(part.content(), return StringDecoder.textPlainOnly().decodeToMono(part.content(),