70 lines
2.2 KiB
Java
70 lines
2.2 KiB
Java
/*
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* Copyright (C) 2008 Google Inc.
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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;
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import static com.google.common.truth.Truth.assertThat;
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import com.google.gson.reflect.TypeToken;
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import java.lang.reflect.Type;
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import java.util.HashMap;
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import java.util.Map;
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import org.junit.Test;
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/**
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* Unit test for the default JSON map serialization object located in the
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* {@link DefaultTypeAdapters} class.
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*
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* @author Joel Leitch
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*/
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public class DefaultMapJsonSerializerTest {
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private Gson gson = new Gson();
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@Test
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public void testEmptyMapNoTypeSerialization() {
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Map<String, String> emptyMap = new HashMap<>();
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JsonElement element = gson.toJsonTree(emptyMap, emptyMap.getClass());
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assertThat(element).isInstanceOf(JsonObject.class);
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JsonObject emptyMapJsonObject = (JsonObject) element;
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assertThat(emptyMapJsonObject.entrySet()).isEmpty();
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}
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@Test
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public void testEmptyMapSerialization() {
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Type mapType = new TypeToken<Map<String, String>>() { }.getType();
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Map<String, String> emptyMap = new HashMap<>();
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JsonElement element = gson.toJsonTree(emptyMap, mapType);
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assertThat(element).isInstanceOf(JsonObject.class);
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JsonObject emptyMapJsonObject = (JsonObject) element;
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assertThat(emptyMapJsonObject.entrySet()).isEmpty();
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}
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@Test
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public void testNonEmptyMapSerialization() {
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Type mapType = new TypeToken<Map<String, String>>() { }.getType();
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Map<String, String> myMap = new HashMap<>();
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String key = "key1";
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myMap.put(key, "value1");
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Gson gson = new Gson();
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JsonElement element = gson.toJsonTree(myMap, mapType);
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assertThat(element.isJsonObject()).isTrue();
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JsonObject mapJsonObject = element.getAsJsonObject();
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assertThat(mapJsonObject.has(key)).isTrue();
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}
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}
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