251 lines
9.8 KiB
Java
251 lines
9.8 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.internal.bind;
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import static com.google.common.truth.Truth.assertThat;
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import static com.google.common.truth.Truth.assertWithMessage;
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import static org.junit.Assert.assertThrows;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import com.google.gson.TypeAdapter;
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import com.google.gson.TypeAdapterFactory;
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import com.google.gson.internal.bind.DefaultDateTypeAdapter.DateType;
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import com.google.gson.reflect.TypeToken;
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import java.io.IOException;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.Locale;
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import java.util.TimeZone;
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import org.junit.Test;
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/**
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* A simple unit test for the {@link DefaultDateTypeAdapter} class.
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*
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* @author Joel Leitch
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*/
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@SuppressWarnings("JavaUtilDate")
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public class DefaultDateTypeAdapterTest {
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@Test
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public void testFormattingInEnUs() {
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assertFormattingAlwaysEmitsUsLocale(Locale.US);
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}
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@Test
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public void testFormattingInFr() {
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assertFormattingAlwaysEmitsUsLocale(Locale.FRANCE);
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}
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private static void assertFormattingAlwaysEmitsUsLocale(Locale locale) {
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TimeZone defaultTimeZone = TimeZone.getDefault();
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TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
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Locale defaultLocale = Locale.getDefault();
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Locale.setDefault(locale);
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try {
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// The patterns here attempt to accommodate minor date-time formatting differences between JDK
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// versions. Ideally Gson would serialize in a way that is independent of the JDK version.
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// Note: \h means "horizontal space", because some JDK versions use Narrow No Break Space
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// (U+202F) before the AM or PM indication.
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String utcFull = "(Coordinated Universal Time|UTC)";
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assertFormatted("Jan 1, 1970,? 12:00:00\\hAM", DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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assertFormatted(
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"1/1/70,? 12:00\\hAM",
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DateType.DATE.createAdapterFactory(DateFormat.SHORT, DateFormat.SHORT));
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assertFormatted(
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"Jan 1, 1970,? 12:00:00\\hAM",
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DateType.DATE.createAdapterFactory(DateFormat.MEDIUM, DateFormat.MEDIUM));
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assertFormatted(
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"January 1, 1970(,| at)? 12:00:00\\hAM UTC",
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DateType.DATE.createAdapterFactory(DateFormat.LONG, DateFormat.LONG));
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assertFormatted(
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"Thursday, January 1, 1970(,| at)? 12:00:00\\hAM " + utcFull,
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DateType.DATE.createAdapterFactory(DateFormat.FULL, DateFormat.FULL));
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} finally {
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TimeZone.setDefault(defaultTimeZone);
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Locale.setDefault(defaultLocale);
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}
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}
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@Test
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public void testParsingDatesFormattedWithSystemLocale() throws Exception {
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TimeZone defaultTimeZone = TimeZone.getDefault();
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TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
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Locale defaultLocale = Locale.getDefault();
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Locale.setDefault(Locale.FRANCE);
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try {
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Date date = new Date(0);
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assertParsed(
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DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM).format(date),
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DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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assertParsed(
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DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date),
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DateType.DATE.createAdapterFactory(DateFormat.SHORT, DateFormat.SHORT));
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assertParsed(
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DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM).format(date),
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DateType.DATE.createAdapterFactory(DateFormat.MEDIUM, DateFormat.MEDIUM));
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assertParsed(
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DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG).format(date),
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DateType.DATE.createAdapterFactory(DateFormat.LONG, DateFormat.LONG));
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assertParsed(
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DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL).format(date),
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DateType.DATE.createAdapterFactory(DateFormat.FULL, DateFormat.FULL));
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} finally {
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TimeZone.setDefault(defaultTimeZone);
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Locale.setDefault(defaultLocale);
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}
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}
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@Test
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public void testParsingDatesFormattedWithUsLocale() throws Exception {
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TimeZone defaultTimeZone = TimeZone.getDefault();
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TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
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Locale defaultLocale = Locale.getDefault();
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Locale.setDefault(Locale.US);
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try {
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assertParsed("Jan 1, 1970 0:00:00 AM", DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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assertParsed(
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"1/1/70 0:00 AM", DateType.DATE.createAdapterFactory(DateFormat.SHORT, DateFormat.SHORT));
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assertParsed(
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"Jan 1, 1970 0:00:00 AM",
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DateType.DATE.createAdapterFactory(DateFormat.MEDIUM, DateFormat.MEDIUM));
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assertParsed(
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"January 1, 1970 0:00:00 AM UTC",
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DateType.DATE.createAdapterFactory(DateFormat.LONG, DateFormat.LONG));
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assertParsed(
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"Thursday, January 1, 1970 0:00:00 AM UTC",
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DateType.DATE.createAdapterFactory(DateFormat.FULL, DateFormat.FULL));
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} finally {
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TimeZone.setDefault(defaultTimeZone);
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Locale.setDefault(defaultLocale);
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}
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}
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@Test
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public void testFormatUsesDefaultTimezone() throws Exception {
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TimeZone defaultTimeZone = TimeZone.getDefault();
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TimeZone.setDefault(TimeZone.getTimeZone("America/Los_Angeles"));
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Locale defaultLocale = Locale.getDefault();
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Locale.setDefault(Locale.US);
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try {
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assertFormatted("Dec 31, 1969,? 4:00:00\\hPM", DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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assertParsed("Dec 31, 1969 4:00:00 PM", DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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} finally {
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TimeZone.setDefault(defaultTimeZone);
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Locale.setDefault(defaultLocale);
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}
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}
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@Test
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public void testDateDeserializationISO8601() throws Exception {
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TypeAdapterFactory adapterFactory = DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY;
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assertParsed("1970-01-01T00:00:00.000Z", adapterFactory);
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assertParsed("1970-01-01T00:00Z", adapterFactory);
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assertParsed("1970-01-01T00:00:00+00:00", adapterFactory);
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assertParsed("1970-01-01T01:00:00+01:00", adapterFactory);
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assertParsed("1970-01-01T01:00:00+01", adapterFactory);
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}
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@Test
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public void testDatePattern() {
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String pattern = "yyyy-MM-dd";
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TypeAdapter<Date> dateTypeAdapter = dateAdapter(DateType.DATE.createAdapterFactory(pattern));
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DateFormat formatter = new SimpleDateFormat(pattern);
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Date currentDate = new Date();
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String dateString = dateTypeAdapter.toJson(currentDate);
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assertThat(dateString).isEqualTo(toLiteral(formatter.format(currentDate)));
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}
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@Test
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public void testInvalidDatePattern() {
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assertThrows(
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IllegalArgumentException.class,
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() -> DateType.DATE.createAdapterFactory("I am a bad Date pattern...."));
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}
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@Test
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public void testNullValue() throws Exception {
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TypeAdapter<Date> adapter = dateAdapter(DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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assertThat(adapter.fromJson("null")).isNull();
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assertThat(adapter.toJson(null)).isEqualTo("null");
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}
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@Test
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public void testUnexpectedToken() throws Exception {
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TypeAdapter<Date> adapter = dateAdapter(DefaultDateTypeAdapter.DEFAULT_STYLE_FACTORY);
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IllegalStateException e =
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assertThrows(IllegalStateException.class, () -> adapter.fromJson("{}"));
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assertThat(e).hasMessageThat().startsWith("Expected a string but was BEGIN_OBJECT");
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}
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@Test
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public void testGsonDateFormat() {
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TimeZone originalTimeZone = TimeZone.getDefault();
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// Set the default timezone to UTC
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TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
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try {
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Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm z").create();
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Date originalDate = new Date(0);
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// Serialize the date object
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String json = gson.toJson(originalDate);
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assertThat(json).isEqualTo("\"1970-01-01 00:00 UTC\"");
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// Deserialize a date string with the PST timezone
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Date deserializedDate = gson.fromJson("\"1970-01-01 00:00 PST\"", Date.class);
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// Assert that the deserialized date's time is correct
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assertThat(deserializedDate.getTime()).isEqualTo(new Date(28800000).getTime());
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// Serialize the deserialized date object again
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String jsonAfterDeserialization = gson.toJson(deserializedDate);
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// The expectation is that the date, after deserialization, when serialized again should still
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// be in the UTC timezone
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assertThat(jsonAfterDeserialization).isEqualTo("\"1970-01-01 08:00 UTC\"");
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} finally {
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TimeZone.setDefault(originalTimeZone);
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}
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}
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private static TypeAdapter<Date> dateAdapter(TypeAdapterFactory adapterFactory) {
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TypeAdapter<Date> adapter = adapterFactory.create(new Gson(), TypeToken.get(Date.class));
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assertThat(adapter).isNotNull();
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return adapter;
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}
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private static void assertFormatted(String formattedPattern, TypeAdapterFactory adapterFactory) {
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TypeAdapter<Date> adapter = dateAdapter(adapterFactory);
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String json = adapter.toJson(new Date(0));
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assertThat(json).matches(toLiteral(formattedPattern));
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}
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@SuppressWarnings("UndefinedEquals")
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private static void assertParsed(String date, TypeAdapterFactory adapterFactory)
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throws IOException {
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TypeAdapter<Date> adapter = dateAdapter(adapterFactory);
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assertWithMessage(date).that(adapter.fromJson(toLiteral(date))).isEqualTo(new Date(0));
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assertWithMessage("ISO 8601")
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.that(adapter.fromJson(toLiteral("1970-01-01T00:00:00Z")))
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.isEqualTo(new Date(0));
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}
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private static String toLiteral(String s) {
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return '"' + s + '"';
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}
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}
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