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StreamDecoderTest.java
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137 lines (117 loc) · 4.02 KB
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/**
* Copyright 2012-2018 The Feign 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 feign.stream;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import feign.Feign;
import feign.RequestLine;
import feign.Response;
import feign.jackson.JacksonIteratorDecoder;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;
import org.junit.Test;
import static feign.Util.UTF_8;
import static org.assertj.core.api.Assertions.assertThat;
public class StreamDecoderTest {
interface StreamInterface {
@RequestLine("GET /")
Stream<String> get();
@RequestLine("GET /cars")
Stream<Car> getCars();
class Car {
public String name;
public String manufacturer;
}
}
private String carsJson = ""//
+ "[\n"//
+ " {\n"//
+ " \"name\": \"Megane\",\n"//
+ " \"manufacturer\": \"Renault\"\n"//
+ " },\n"//
+ " {\n"//
+ " \"name\": \"C4\",\n"//
+ " \"manufacturer\": \"Citroën\"\n"//
+ " }\n"//
+ "]\n";
@Test
public void simpleStreamTest() throws IOException, InterruptedException {
MockWebServer server = new MockWebServer();
server.enqueue(new MockResponse().setBody("foo\nbar"));
StreamInterface api = Feign.builder()
.decoder(StreamDecoder.create(
(response, type) -> new BufferedReader(response.body().asReader()).lines().iterator()))
.doNotCloseAfterDecode()
.target(StreamInterface.class, server.url("/").toString());
try (Stream<String> stream = api.get()) {
assertThat(stream.collect(Collectors.toList())).isEqualTo(Arrays.asList("foo", "bar"));
}
}
@Test
public void simpleJsonStreamTest() throws IOException, InterruptedException {
MockWebServer server = new MockWebServer();
server.enqueue(new MockResponse().setBody(carsJson));
ObjectMapper mapper = new ObjectMapper();
StreamInterface api = Feign.builder()
.decoder(StreamDecoder.create(JacksonIteratorDecoder.create()))
.doNotCloseAfterDecode()
.target(StreamInterface.class, server.url("/").toString());
try (Stream<StreamInterface.Car> stream = api.getCars()) {
assertThat(stream.collect(Collectors.toList())).hasSize(2);
}
}
@Test
public void shouldCloseIteratorWhenStreamClosed() throws IOException {
Response response = Response.builder()
.status(200)
.reason("OK")
.headers(Collections.emptyMap())
.body("", UTF_8)
.build();
TestCloseableIterator it = new TestCloseableIterator();
StreamDecoder decoder = new StreamDecoder((r, t) -> it);
try (Stream<?> stream =
(Stream) decoder.decode(response, new TypeReference<Stream<String>>() {}.getType())) {
assertThat(stream.collect(Collectors.toList())).hasSize(1);
assertThat(it.called).isTrue();
} finally {
assertThat(it.closed).isTrue();
}
}
static class TestCloseableIterator implements Iterator<String>, Closeable {
boolean called;
boolean closed;
@Override
public void close() throws IOException {
this.closed = true;
}
@Override
public boolean hasNext() {
return !called;
}
@Override
public String next() {
called = true;
return "feign";
}
}
}