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GsonCodecTest.java
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240 lines (207 loc) · 7.15 KB
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/**
* Copyright 2012-2020 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.gson;
import com.google.gson.TypeAdapter;
import com.google.gson.reflect.TypeToken;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import feign.Request;
import feign.Request.HttpMethod;
import feign.Util;
import org.junit.Test;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import feign.RequestTemplate;
import feign.Response;
import static feign.Util.UTF_8;
import static feign.assertj.FeignAssertions.assertThat;
import static org.junit.Assert.assertEquals;
import static org.j
8000
unit.Assert.assertNull;
@SuppressWarnings("deprecation")
public class GsonCodecTest {
@Test
public void encodesMapObjectNumericalValuesAsInteger() {
Map<String, Object> map = new LinkedHashMap<>();
map.put("foo", 1);
RequestTemplate template = new RequestTemplate();
new GsonEncoder().encode(map, map.getClass(), template);
assertThat(template).hasBody("" //
+ "{\n" //
+ " \"foo\": 1\n" //
+ "}");
}
@Test
public void decodesMapObjectNumericalValuesAsInteger() throws Exception {
Map<String, Object> map = new LinkedHashMap<>();
map.put("foo", 1);
Response response = Response.builder()
.status(200)
.reason("OK")
.request(Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.headers(Collections.emptyMap())
.body("{\"foo\": 1}", UTF_8)
.build();
assertEquals(
new GsonDecoder().decode(response, new TypeToken<Map<String, Object>>() {}.getType()), map);
}
@Test
public void encodesFormParams() {
Map<String, Object> form = new LinkedHashMap<>();
form.put("foo", 1);
form.put("bar", Arrays.asList(2, 3));
RequestTemplate template = new RequestTemplate();
new GsonEncoder().encode(form, new TypeToken<Map<String, ?>>() {}.getType(), template);
assertThat(template).hasBody("" //
+ "{\n" //
+ " \"foo\": 1,\n" //
+ " \"bar\": [\n" //
+ " 2,\n" //
+ " 3\n" //
+ " ]\n" //
+ "}");
}
static class Zone extends LinkedHashMap<String, Object> {
Zone() {
// for reflective instantiation.
}
Zone(String name) {
this(name, null);
}
Zone(String name, String id) {
put("name", name);
if (id != null) {
put("id", id);
}
}
private static final long serialVersionUID = 1L;
}
@Test
public void decodes() throws Exception {
List<Zone> zones = new LinkedList<Zone>();
zones.add(new Zone("denominator.io."));
zones.add(new Zone("denominator.io.", "ABCD"));
Response response = Response.builder()
.status(200)
.reason("OK")
.headers(Collections.emptyMap())
.request(Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.body(zonesJson, UTF_8)
.build();
assertEquals(zones,
new GsonDecoder().decode(response, new TypeToken<List<Zone>>() {}.getType()));
}
@Test
public void nullBodyDecodesToNull() throws Exception {
Response response = Response.builder()
.status(204)
.reason("OK")
.headers(Collections.emptyMap())
.request(Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.build();
assertNull(new GsonDecoder().decode(response, String.class));
}
@Test
public void emptyBodyDecodesToNull() throws Exception {
Response response = Response.builder()
.status(204)
.reason("OK")
.headers(Collections.emptyMap())
.request(Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.body(new byte[0])
.build();
assertNull(new GsonDecoder().decode(response, String.class));
}
private String zonesJson = ""//
+ "[\n"//
+ " {\n"//
+ " \"name\": \"denominator.io.\"\n"//
+ " },\n"//
+ " {\n"//
+ " \"name\": \"denominator.io.\",\n"//
+ " \"id\": \"ABCD\"\n"//
+ " }\n"//
+ "]\n";
final TypeAdapter upperZone = new TypeAdapter<Zone>() {
@Override
public void write(JsonWriter out, Zone value) throws IOException {
out.beginObject();
for (Map.Entry<String, Object> entry : value.entrySet()) {
out.name(entry.getKey()).value(entry.getValue().toString().toUpperCase());
}
out.endObject();
}
@Override
public Zone read(JsonReader in) throws IOException {
in.beginObject();
Zone zone = new Zone();
while (in.hasNext()) {
zone.put(in.nextName(), in.nextString().toUpperCase());
}
in.endObject();
return zone;
}
};
@Test
public void customDecoder() throws Exception {
GsonDecoder decoder = new GsonDecoder(Collections.singletonList(upperZone));
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")
.headers(Collections.emptyMap())
.request(
Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.body(zonesJson, UTF_8)
.build();
assertEquals(zones, decoder.decode(response, new TypeToken<List<Zone>>() {}.getType()));
}
@Test
public void customEncoder() {
GsonEncoder encoder = new GsonEncoder(Collections.singletonList(upperZone));
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 TypeToken<List<Zone>>() {}.getType(), template);
assertThat(template).hasBody("" //
+ "[\n" //
+ " {\n" //
+ " \"name\": \"DENOMINATOR.IO.\"\n" //
+ " },\n" //
+ " {\n" //
+ " \"name\": \"DENOMINATOR.IO.\",\n" //
+ " \"id\": \"ABCD\"\n" //
+ " }\n" //
+ "]");
}
/** Enabled via {@link feign.Feign.Builder#decode404()} */
@Test
public void notFoundDecodesToNull() throws Exception {
Response response = Response.builder()
.status(404)
.reason("NOT FOUND")
.headers(Collections.emptyMap())
.request(Request.create(HttpMethod.GET, "/api", Collections.emptyMap(), null, Util.UTF_8))
.build();
assertThat((byte[]) new GsonDecoder().decode(response, byte[].class)).isNull();
}
}