125 lines
3.8 KiB
Java
125 lines
3.8 KiB
Java
/*
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* Copyright (C) 2016 Gson Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.gson.typeadapters;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.fail;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import java.util.Arrays;
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import java.util.List;
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import javax.annotation.PostConstruct;
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import org.junit.Test;
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public class PostConstructAdapterFactoryTest {
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@Test
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public void test() throws Exception {
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Gson gson =
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new GsonBuilder().registerTypeAdapterFactory(new PostConstructAdapterFactory()).create();
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gson.fromJson("{\"bread\": \"white\", \"cheese\": \"cheddar\"}", Sandwich.class);
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try {
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gson.fromJson("{\"bread\": \"cheesey bread\", \"cheese\": \"swiss\"}", Sandwich.class);
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fail();
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} catch (IllegalArgumentException expected) {
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assertEquals("too cheesey", expected.getMessage());
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}
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}
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@Test
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public void testList() {
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MultipleSandwiches sandwiches =
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new MultipleSandwiches(
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Arrays.asList(new Sandwich("white", "cheddar"), new Sandwich("whole wheat", "swiss")));
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Gson gson =
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new GsonBuilder().registerTypeAdapterFactory(new PostConstructAdapterFactory()).create();
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// Throws NullPointerException without the fix in https://github.com/google/gson/pull/1103
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String json = gson.toJson(sandwiches);
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assertEquals(
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"{\"sandwiches\":[{\"bread\":\"white\",\"cheese\":\"cheddar\"},{\"bread\":\"whole"
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+ " wheat\",\"cheese\":\"swiss\"}]}",
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json);
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MultipleSandwiches sandwichesFromJson = gson.fromJson(json, MultipleSandwiches.class);
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assertEquals(sandwiches, sandwichesFromJson);
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}
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@SuppressWarnings({"overrides", "EqualsHashCode"}) // for missing hashCode() override
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static class Sandwich {
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public String bread;
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public String cheese;
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public Sandwich(String bread, String cheese) {
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this.bread = bread;
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this.cheese = cheese;
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}
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@PostConstruct
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private void validate() {
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if (bread.equals("cheesey bread") && cheese != null) {
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throw new IllegalArgumentException("too cheesey");
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}
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}
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@Override
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public boolean equals(Object o) {
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if (o == this) {
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return true;
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}
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if (!(o instanceof Sandwich)) {
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return false;
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}
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final Sandwich other = (Sandwich) o;
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if (this.bread == null ? other.bread != null : !this.bread.equals(other.bread)) {
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return false;
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}
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if (this.cheese == null ? other.cheese != null : !this.cheese.equals(other.cheese)) {
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return false;
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}
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return true;
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}
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}
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@SuppressWarnings({"overrides", "EqualsHashCode"}) // for missing hashCode() override
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static class MultipleSandwiches {
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public List<Sandwich> sandwiches;
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public MultipleSandwiches(List<Sandwich> sandwiches) {
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this.sandwiches = sandwiches;
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}
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@Override
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public boolean equals(Object o) {
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if (o == this) {
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return true;
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}
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if (!(o instanceof MultipleSandwiches)) {
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return false;
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}
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final MultipleSandwiches other = (MultipleSandwiches) o;
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if (this.sandwiches == null
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? other.sandwiches != null
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: !this.sandwiches.equals(other.sandwiches)) {
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return false;
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}
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return true;
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}
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}
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}
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