87 lines
3.1 KiB
Java
87 lines
3.1 KiB
Java
/*
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* Copyright (C) 2012 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.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import java.io.IOException;
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import java.util.Locale;
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import org.junit.Test;
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/**
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* Tests handling of Core Type Adapters
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*
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* @author Jesse Wilson
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*/
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public class OverrideCoreTypeAdaptersTest {
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private static final TypeAdapter<Boolean> booleanAsIntAdapter =
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new TypeAdapter<Boolean>() {
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@Override
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public void write(JsonWriter out, Boolean value) throws IOException {
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out.value(value ? 1 : 0);
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}
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@Override
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public Boolean read(JsonReader in) throws IOException {
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int value = in.nextInt();
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return value != 0;
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}
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};
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private static final TypeAdapter<String> swapCaseStringAdapter =
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new TypeAdapter<String>() {
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@Override
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public void write(JsonWriter out, String value) throws IOException {
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out.value(value.toUpperCase(Locale.US));
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}
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@Override
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public String read(JsonReader in) throws IOException {
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return in.nextString().toLowerCase(Locale.US);
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}
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};
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@Test
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public void testOverrideWrapperBooleanAdapter() {
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Gson gson = new GsonBuilder().registerTypeAdapter(Boolean.class, booleanAsIntAdapter).create();
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assertThat(gson.toJson(true, boolean.class)).isEqualTo("true");
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assertThat(gson.toJson(true, Boolean.class)).isEqualTo("1");
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assertThat(gson.fromJson("true", boolean.class)).isEqualTo(Boolean.TRUE);
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assertThat(gson.fromJson("1", Boolean.class)).isEqualTo(Boolean.TRUE);
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assertThat(gson.fromJson("0", Boolean.class)).isEqualTo(Boolean.FALSE);
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}
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@Test
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public void testOverridePrimitiveBooleanAdapter() {
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Gson gson = new GsonBuilder().registerTypeAdapter(boolean.class, booleanAsIntAdapter).create();
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assertThat(gson.toJson(true, boolean.class)).isEqualTo("1");
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assertThat(gson.toJson(true, Boolean.class)).isEqualTo("true");
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assertThat(gson.fromJson("1", boolean.class)).isEqualTo(Boolean.TRUE);
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assertThat(gson.fromJson("true", Boolean.class)).isEqualTo(Boolean.TRUE);
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assertThat(gson.toJson(false, boolean.class)).isEqualTo("0");
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}
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@Test
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public void testOverrideStringAdapter() {
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Gson gson = new GsonBuilder().registerTypeAdapter(String.class, swapCaseStringAdapter).create();
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assertThat(gson.toJson("Hello", String.class)).isEqualTo("\"HELLO\"");
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assertThat(gson.fromJson("\"Hello\"", String.class)).isEqualTo("hello");
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}
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}
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