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/*
* Copyright 2013 Netflix, Inc.
*
* 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;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.squareup.okhttp.mockwebserver.MockResponse;
import com.squareup.okhttp.mockwebserver.SocketPolicy;
import com.squareup.okhttp.mockwebserver.rule.MockWebServerRule;
import okio.Buffer;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import java.io.IOException;
import java.lang.reflect.Type;
import java.net.URI;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import feign.Target.HardCodedTarget;
import feign.codec.DecodeException;
import feign.codec.Decoder;
import feign.codec.EncodeException;
import feign.codec.Encoder;
import feign.codec.ErrorDecoder;
import feign.codec.StringDecoder;
import static feign.Util.UTF_8;
import static feign.assertj.MockWebServerAssertions.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class FeignTest {
@Rule
public final ExpectedException thrown = ExpectedException.none();
@Rule
public final MockWebServerRule server = new MockWebServerRule();
@Test
public void iterableQueryParams() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.queryParams("user", Arrays.asList("apple", "pear"));
assertThat(server.takeRequest())
.hasPath("/?1=user&2=apple&2=pear");
}
@Test
public void postTemplateParamsResolve() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.login("netflix", "denominator", "password");
assertThat(server.takeRequest())
.hasBody(
"{\"customer_name\": \"netflix\", \"user_name\": \"denominator\", \"password\": \"password\"}");
}
@Test
public void responseCoercesToStringBody() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
Response response = api.response();
assertTrue(response.body().isRepeatable());
assertEquals("foo", response.body().toString());
}
@Test
public void postFormParams() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.form("netflix", "denominator", "password");
assertThat(server.takeRequest())
.hasBody(
"{\"customer_name\":\"netflix\",\"user_name\":\"denominator\",\"password\":\"password\"}");
}
@Test
public void postBodyParam() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.body(Arrays.asList("netflix", "denominator", "password"));
assertThat(server.takeRequest())
.hasHeaders("Content-Length: 32")
.hasBody("[netflix, denominator, password]");
}
/**
* The type of a parameter value may not be the desired type to encode as. Prefer the interface
* type.
*/
@Test
public void bodyTypeCorrespondsWithParameterType() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
final AtomicReference<Type> encodedType = new AtomicReference<Type>();
TestInterface api = new TestInterfaceBuilder()
.encoder(new Encoder.Default() {
@Override
public void encode(Object object, Type bodyType, RequestTemplate template) {
encodedType.set(bodyType);
}
})
.target("http://localhost:" + server.getPort());
api.body(Arrays.asList("netflix", "denominator", "password"));
server.takeRequest();
assertThat(encodedType.get()).isEqualTo(new TypeToken<List<String>>() {
}.getType());
}
@Test
public void postGZIPEncodedBodyParam() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.gzipBody(Arrays.asList("netflix", "denominator", "password"));
assertThat(server.takeRequest())
.hasNoHeaderNamed("Content-Length")
.hasGzippedBody("[netflix, denominator, password]".getBytes(UTF_8));
}
@Test
public void postDeflateEncodedBodyParam() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.deflateBody(Arrays.asList("netflix", "denominator", "password"));
assertThat(server.takeRequest())
.hasNoHeaderNamed("Content-Length")
.hasDeflatedBody("[netflix, denominator, password]".getBytes(UTF_8));
}
@Test
public void singleInterceptor() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder()
.requestInterceptor(new ForwardedForInterceptor())
.target("http://localhost:" + server.getPort());
api.post();
assertThat(server.takeRequest())
.hasHeaders("X-Forwarded-For: origin.host.com");
}
@Test
public void multipleInterceptor() throws Exception {
server.enqueue(new MockResponse().setBody("foo"));
TestInterface api = new TestInterfaceBuilder()
.requestInterceptor(new ForwardedForInterceptor())
.requestInterceptor(new UserAgentInterceptor())
.target("http://localhost:" + server.getPort());
api.post();
assertThat(server.takeRequest()).hasHeaders("X-Forwarded-For: origin.host.com",
"User-Agent: Feign");
}
@Test
public void customExpander() throws Exception {
server.enqueue(new MockResponse());
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.expand(new Date(1234l));
assertThat(server.takeRequest())
.hasPath("/?date=1234");
}
@Test
public void configKeyFormatsAsExpected() throws Exception {
assertEquals("TestInterface#post()",
Feign.configKey(TestInterface.class.getDeclaredMethod("post")));
assertEquals("TestInterface#uriParam(String,URI,String)",
Feign.configKey(TestInterface.class
.getDeclaredMethod("uriParam", String.class, URI.class,
String.class)));
}
@Test
public void configKeyUsesChildType() throws Exception {
assertEquals("List#iterator()",
Feign.configKey(List.class, Iterable.class.getDeclaredMethod("iterator")));
}
@Test
public void canOverrideErrorDecoder() throws Exception {
server.enqueue(new MockResponse().setResponseCode(404).setBody("foo"));
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("zone not found");
TestInterface api = new TestInterfaceBuilder()
.errorDecoder(new IllegalArgumentExceptionOn404())
.target("http://localhost:" + server.getPort());
api.post();
}
@Test
public void retriesLostConnectionBeforeRead() throws Exception {
server.enqueue(new MockResponse().setSocketPolicy(SocketPolicy.DISCONNECT_AT_START));
server.enqueue(new MockResponse().setBody("success!"));
TestInterface api = new TestInterfaceBuilder().target("http://localhost:" + server.getPort());
api.post();
assertEquals(2, server.getRequestCount());
}
@Test
public void overrideTypeSpecificDecoder() throws Exception {
server.enqueue(new MockResponse().setBody("success!"));
TestInterface api = new TestInterfaceBuilder()
.decoder(new Decoder() {
@Override
public Object decode(Response response, Type type) {
return "fail";
}
}).target("http://localhost:" + server.getPort());
assertEquals(api.post(), "fail");
}
/**
* when you must parse a 2xx status to determine if the operation succeeded or not.
*/
@Test
public void retryableExceptionInDecoder() throws Exception {
server.enqueue(new MockResponse().setBody("retry!"));
server.enqueue(new MockResponse().setBody("success!"));
TestInterface api = new TestInterfaceBuilder()
.decoder(new StringDecoder() {
@Override
public Object decode(Response response, Type type) throws IOException {
String string = super.decode(response, type).toString();
if ("retry!".equals(string)) {
throw new RetryableException(string, null);
}
return string;
}
}).target("http://localhost:" + server.getPort());
assertEquals(api.post(), "success!");
assertEquals(2, server.getRequestCount());
}
@Test
public void doesntRetryAfterResponseIsSent() throws Exception {
server.enqueue(new MockResponse().setBody("success!"));
thrown.expect(FeignException.class);
thrown.expectMessage("timeout reading POST http://");
TestInterface api = new TestInterfaceBuilder()
.decoder(new Decoder() {
@Override
public Object decode(Response response, Type type) throws IOException {
throw new IOException("timeout");
}
}).target("http://localhost:" + server.getPort());
api.post();
}
@Test
public void ensureRetryerClonesItself() {
server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 1"));
server.enqueue(new MockResponse().setResponseCode(200).setBody("foo 2"));
server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 3"));
server.enqueue(new MockResponse().setResponseCode(200).setBody("foo 4"));
MockRetryer retryer = new MockRetryer();
TestInterface api = Feign.builder()
.retryer(retryer)
.errorDecoder(new ErrorDecoder()
{
@Override
public Exception decode(String methodKey, Response response)
{
return new RetryableException("play it again sam!", null);
}
}).target(TestInterface.class, "http://localhost:" + server.getPort());
api.response();
api.response(); // if retryer instance was reused, this statement will throw an exception
assertEquals(4, server.getRequestCount());
}
private static class MockRetryer implements Retryer
{
boolean tripped;
@Override
public void continueOrPropagate(RetryableException e) {
if (tripped) {
throw new RuntimeException("retryer instance should never be reused");
}
tripped = true;
return;
}
@Override
public Retryer clone() {
return new MockRetryer();
}
}
@Test
public void okIfDecodeRootCauseHasNoMessage() throws Exception {
server.enqueue(new MockResponse().setBody("success!"));
thrown.expect(DecodeException.class);
TestInterface api = new TestInterfaceBuilder()
.decoder(new Decoder() {
@Override
public Object decode(Response response, Type type) throws IOException {
throw new RuntimeException();
}
}).target("http://localhost:" + server.getPort());
api.post();
}
@Test
public void okIfEncodeRootCauseHasNoMessage() throws Exception {
server.enqueue(new MockResponse().setBody("success!"));
thrown.expect(EncodeException.class);
TestInterface api = new TestInterfaceBuilder()
.encoder(new Encoder() {
@Override
public void encode(Object object, Type bodyType, RequestTemplate template) {
throw new RuntimeException();
}
}).target("http://localhost:" + server.getPort());
api.body(Arrays.asList("foo"));
}
@Test
public void equalsHashCodeAndToStringWork() {
Target<TestInterface>
t1 =
new HardCodedTarget<TestInterface>(TestInterface.class, "http://localhost:8080");
Target<TestInterface>
t2 =
new HardCodedTarget<TestInterface>(TestInterface.class, "http://localhost:8888");
Target<OtherTestInterface> t3 =
new HardCodedTarget<OtherTestInterface>(OtherTestInterface.class, "http://localhost:8080");
TestInterface i1 = Feign.builder().target(t1);
TestInterface i2 = Feign.builder().target(t1);
TestInterface i3 = Feign.builder().target(t2);
OtherTestInterface i4 = Feign.builder().target(t3);
assertThat(i1)
.isEqualTo(i2)
.isNotEqualTo(i3)
.isNotEqualTo(i4);
assertThat(i1.hashCode())
.isEqualTo(i2.hashCode())
.isNotEqualTo(i3.hashCode())
.isNotEqualTo(i4.hashCode());
assertThat(i1.toString())
.isEqualTo(i2.toString())
.isNotEqualTo(i3.toString())
.isNotEqualTo(i4.toString());
assertThat(t1)
.isNotEqualTo(i1);
assertThat(t1.hashCode())
.isEqualTo(i1.hashCode());
assertThat(t1.toString())
.isEqualTo(i1.toString());
}
@Test
public void decodeLogicSupportsByteArray() throws Exception {
byte[] expectedResponse = {12, 34, 56};
server.enqueue(new MockResponse().setBody(new Buffer().write(expectedResponse)));
OtherTestInterface
api =
Feign.builder().target(OtherTestInterface.class, "http://localhost:" + server.getPort());
assertThat(api.binaryResponseBody())
.containsExactly(expectedResponse);
}
@Test
public void encodeLogicSupportsByteArray() throws Exception {
byte[] expectedRequest = {12, 34, 56};
server.enqueue(new MockResponse());
OtherTestInterface
api =
Feign.builder().target(OtherTestInterface.class, "http://localhost:" + server.getPort());
api.binaryRequestBody(expectedRequest);
assertThat(server.takeRequest())
.hasBody(expectedRequest);
}
interface TestInterface {
@RequestLine("POST /")
Response response();
@RequestLine("POST /")
String post();
@RequestLine("POST /")
@Body("%7B\"customer_name\": \"{customer_name}\", \"user_name\": \"{user_name}\", \"password\": \"{password}\"%7D")
void login(
@Param("customer_name") String customer, @Param("user_name") String user,
@Param("password") String password);
@RequestLine("POST /")
void body(List<String> contents);
@RequestLine("POST /")
@Headers("Content-Encoding: gzip")
void gzipBody(List<String> contents);
@RequestLine("POST /")
@Headers("Content-Encoding: deflate")
void deflateBody(List<String> contents);
@RequestLine("POST /")
void form(
@Param("customer_name") String customer, @Param("user_name") String user,
@Param("password") String password);
@RequestLine("GET /{1}/{2}")
Response uriParam(@Param("1") String one, URI endpoint, @Param("2") String two);
@RequestLine("GET /?1={1}&2={2}")
Response queryParams(@Param("1") String one, @Param("2") Iterable<String> twos);
@RequestLine("POST /?date={date}")
void expand(@Param(value = "date", expander = DateToMillis.class) Date date);
class DateToMillis implements Param.Expander {
@Override
public String expand(Object value) {
return String.valueOf(((Date) value).getTime());
}
}
}
interface OtherTestInterface {
@RequestLine("POST /")
String post();
@RequestLine("POST /")
byte[] binaryResponseBody();
@RequestLine("POST /")
void binaryRequestBody(byte[] contents);
}
static class ForwardedForInterceptor implements RequestInterceptor {
@Override
public void apply(RequestTemplate template) {
template.header("X-Forwarded-For", "origin.host.com");
}
}
static class UserAgentInterceptor implements RequestInterceptor {
@Override
public void apply(RequestTemplate template) {
template.header("User-Agent", "Feign");
}
}
static class IllegalArgumentExceptionOn404 extends ErrorDecoder.Default {
@Override
public Exception decode(String methodKey, Response response) {
if (response.status() == 404) {
return new IllegalArgumentException("zone not found");
}
return super.decode(methodKey, response);
}
}
static final class TestInterfaceBuilder {
private final Feign.Builder delegate = new Feign.Builder()
.decoder(new Decoder.Default())
.encoder(new Encoder() {
@Override
public void encode(Object object, Type bodyType, RequestTemplate template) {
if (object instanceof Map) {
template.body(new Gson().toJson(object));
} else {
template.body(object.toString());
}
}
});
TestInterfaceBuilder requestInterceptor(RequestInterceptor requestInterceptor) {
delegate.requestInterceptor(requestInterceptor);
return this;
}
TestInterfaceBuilder encoder(Encoder encoder) {
delegate.encoder(encoder);
return this;
}
TestInterfaceBuilder decoder(Decoder decoder) {
delegate.decoder(decoder);
return this;
}
TestInterfaceBuilder errorDecoder(ErrorDecoder errorDecoder) {
delegate.errorDecoder(errorDecoder);
return this;
}
TestInterface target(String url) {
return delegate.target(TestInterface.class, url);
}
}
}