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/*
* Copyright © 2012 The Feign Authors (feign@commonhaus.dev)
*
* 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.jackson;
import static feign.Util.UTF_8;
import static feign.assertj.FeignAssertions.assertThat;
import static org.assertj.core.api.Assertions.assertThat;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import feign.Request;
import feign.Request.HttpMethod;
import feign.RequestTemplate;
import feign.Response;
import feign.Util;
import java.io.Closeable;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.junit.jupiter.api.Test;
@SuppressWarnings("deprecation")
class JacksonCodecTest {
private String zonesJson =
"" //
+ "["
+ System.lineSeparator() //
+ " {"
+ System.lineSeparator() //
+ " \"name\": \"denominator.io.\""
+ System.lineSeparator() //
+ " },"
+ System.lineSeparator() //
+ " {"
+ System.lineSeparator() //
+ " \"name\": \"denominator.io.\","
+ System.lineSeparator() //
+ " \"id\": \"ABCD\""
+ System.lineSeparator() //
+ " }"
+ System.lineSeparator() //
+ "]"
+ System.lineSeparator();
@Test
void encodesMapObjectNumericalValuesAsInteger() {
Map<String, Object> map = new LinkedHashMap<>();
map.put("foo", 1);
RequestTemplate template = new RequestTemplate();
new JacksonEncoder().encode(map, map.getClass(), template);
assertThat(template)
.hasBody(
"" //
+ "{"
+ System.lineSeparator() //
+ " \"foo\" : 1"
+ System.lineSeparator() //
+ "}");
}
@Test
void encodesFormParams() {
Map<String, Object> form = new LinkedHashMap<>();
form.put("foo", 1);
form.put("bar", Arrays.asList(2, 3));
RequestTemplate template = new RequestTemplate();
new JacksonEncoder().encode(form, new TypeReference<Map<String, ?>>() {}.getType(), template);
assertThat(template)
.hasBody(
"" //
+ "{"
+ System.lineSeparator() //
+ " \"foo\" : 1,"
+ System.lineSeparator() //
+ " \"bar\" : [ 2, 3 ]"
+ System.lineSeparator() //
+ "}");
}
@Test
void decodes() throws Exception {
List<Zone> zones = new LinkedList<>();
zones.add(new Zone("denominator.io."));
zones.add(new Zone("denominator.io.", "ABCD"));
Response response =
Response.builder()
.status(200)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.body(zonesJson, UTF_8)
.build();
assertThat(new JacksonDecoder().decode(response, new TypeReference<List<Zone>>() {}.getType()))
.isEqualTo(zones);
}
@Test
void nullBodyDecodesToNull() throws Exception {
Response response =
Response.builder()
.status(204)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.build();
assertThat(new JacksonDecoder().decode(response, String.class)).isNull();
}
@Test
void emptyBodyDecodesToNull() throws Exception {
Response response =
Response.builder()
.status(204)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.body(new byte[0])
.build();
assertThat(new JacksonDecoder().decode(response, String.class)).isNull();
}
@Test
void customDecoder() throws Exception {
JacksonDecoder decoder =
new JacksonDecoder(
Arrays.asList(new SimpleModule().addDeserializer(Zone.class, new ZoneDeserializer())));
List<Zone> zones = new LinkedList<>();
zones.add(new Zone("DENOMINATOR.IO."));
zones.add(new Zone("DENOMINATOR.IO.", "ABCD"));
Response response =
Response.builder()
.status(200)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.body(zonesJson, UTF_8)
.build();
assertThat(decoder.decode(response, new TypeReference<List<Zone>>() {}.getType()))
.isEqualTo(zones);
}
@Test
void customEncoder() {
JacksonEncoder encoder =
new JacksonEncoder(
Arrays.asList(new SimpleModule().addSerializer(Zone.class, new ZoneSerializer())));
List<Zone> zones = new LinkedList<>();
zones.add(new Zone("denominator.io."));
zones.add(new Zone("denominator.io.", "abcd"));
RequestTemplate template = new RequestTemplate();
encoder.encode(zones, new TypeReference<List<Zone>>() {}.getType(), template);
assertThat(template)
.hasBody(
"" //
+ "[ {"
+ System.lineSeparator()
+ " \"name\
8000
" : \"DENOMINATOR.IO.\""
+ System.lineSeparator()
+ "}, {"
+ System.lineSeparator()
+ " \"name\" : \"DENOMINATOR.IO.\","
+ System.lineSeparator()
+ " \"id\" : \"ABCD\""
+ System.lineSeparator()
+ "} ]");
}
@Test
void decoderCharset() throws IOException {
Zone zone = new Zone("denominator.io.", "ÁÉÍÓÚÀÈÌÒÙÄËÏÖÜÑ");
Map<String, Collection<String>> headers = new HashMap<>();
headers.put("Content-Type", Arrays.asList("application/json;charset=ISO-8859-1"));
Response response =
Response.builder()
.status(200)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(headers)
.body(
new String(
"" //
+ "{"
+ System.lineSeparator()
+ " \"name\" : \"DENOMINATOR.IO.\","
+ System.lineSeparator()
+ " \"id\" : \"ÁÉÍÓÚÀÈÌÒÙÄËÏÖÜÑ\""
+ System.lineSeparator()
+ "}")
.getBytes(StandardCharsets.ISO_8859_1))
.build();
assertThat(
((Zone) new JacksonDecoder().decode(response, new TypeReference<Zone>() {}.getType())))
.containsEntry("id", zone.get("id"));
}
@Test
void decodesIterator() throws Exception {
List<Zone> zones = new LinkedList<>();
zones.add(new Zone("denominator.io."));
zones.add(new Zone("denominator.io.", "ABCD"));
Response response =
Response.builder()
.status(200)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.body(zonesJson, UTF_8)
.build();
Object decoded =
JacksonIteratorDecoder.create()
.decode(response, new TypeReference<Iterator<Zone>>() {}.getType());
assertThat(Iterator.class.isAssignableFrom(decoded.getClass())).isTrue();
assertThat(Closeable.class.isAssignableFrom(decoded.getClass())).isTrue();
assertThat(asList((Iterator<?>) decoded)).isEqualTo(zones);
}
private <T> List<T> asList(Iterator<T> iter) {
final List<T> copy = new ArrayList<>();
while (iter.hasNext()) {
copy.add(iter.next());
}
return copy;
}
@Test
void nullBodyDecodesToEmptyIterator() throws Exception {
Response response =
Response.builder()
.status(204)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.build();
assertThat((byte[]) JacksonIteratorDecoder.create().decode(response, byte[].class)).isEmpty();
}
@Test
void emptyBodyDecodesToEmptyIterator() throws Exception {
Response response =
Response.builder()
.status(204)
.reason("OK")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.body(new byte[0])
.build();
assertThat((byte[]) JacksonIteratorDecoder.create().decode(response, byte[].class)).isEmpty();
}
static class Zone extends LinkedHashMap<String, Object> {
private static final long serialVersionUID = 1L;
Zone() {
// for reflective instantiation.
}
Zone(String name) {
this(name, null);
}
Zone(String name, String id) {
put("name", name);
if (id != null) {
put("id", id);
}
}
}
static class ZoneDeserializer extends StdDeserializer<Zone> {
public ZoneDeserializer() {
super(Zone.class);
}
@Override
public Zone deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
Zone zone = new Zone();
jp.nextToken();
while (jp.nextToken() != JsonToken.END_OBJECT) {
String name = jp.getCurrentName();
String value = jp.getValueAsString();
if (value != null) {
zone.put(name, value.toUpperCase());
}
}
return zone;
}
}
static class ZoneSerializer extends StdSerializer<Zone> {
public ZoneSerializer() {
super(Zone.class);
}
@Override
public void serialize(Zone value, JsonGenerator jgen, SerializerProvider provider)
throws IOException {
jgen.writeStartObject();
for (Map.Entry<String, Object> entry : value.entrySet()) {
jgen.writeFieldName(entry.getKey());
jgen.writeString(entry.getValue().toString().toUpperCase());
}
jgen.writeEndObject();
}
}
/** Enabled via {@link feign.Feign.Builder#dismiss404()} */
@Test
void notFoundDecodesToEmpty() throws Exception {
Response response =
Response.builder()
.status(404)
.reason("NOT FOUND")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.build();
assertThat((byte[]) new JacksonDecoder().decode(response, byte[].class)).isEmpty();
}
/** Enabled via {@link feign.Feign.Builder#dismiss404()} */
@Test
void notFoundDecodesToEmptyIterator() throws Exception {
Response response =
Response.builder()
.status(404)
.reason("NOT FOUND")
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.build();
assertThat((byte[]) JacksonIteratorDecoder.create().decode(response, byte[].class)).isEmpty();
}
}