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// Copyright (C) 2019 The Android Open Source Project
//
// 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 com.google.gerrit.json;
import static com.google.common.truth.Truth.assertThat;
import com.google.gson.Gson;
import org.junit.Test;
public class JsonEnumMappingTest {
// Use the regular, pre-configured Gson object we use throughout the Gerrit server to ensure that
// the EnumTypeAdapterFactory is properly set up.
private final Gson gson = OutputFormat.JSON.newGson();
@Test
public void nullCanBeWrittenAndParsedBack() {
String resultingJson = gson.toJson(null, TestEnum.class);
TestEnum value = gson.fromJson(resultingJson, TestEnum.class);
assertThat(value).isNull();
}
@Test
public void enumValueCanBeWrittenAndParsedBack() {
String resultingJson = gson.toJson(TestEnum.ONE, TestEnum.class);
TestEnum value = gson.fromJson(resultingJson, TestEnum.class);
assertThat(value).isEqualTo(TestEnum.ONE);
}
@Test
public void enumValueCanBeParsed() {
TestData data = gson.fromJson("{\"value\":\"ONE\"}", TestData.class);
assertThat(data.value).isEqualTo(TestEnum.ONE);
}
@Test
public void mixedCaseEnumValueIsTreatedAsUnset() {
TestData data = gson.fromJson("{\"value\":\"oNe\"}", TestData.class);
assertThat(data.value).isNull();
}
@Test
public void lowerCaseEnumValueIsTreatedAsUnset() {
TestData data = gson.fromJson("{\"value\":\"one\"}", TestData.class);
assertThat(data.value).isNull();
}
@Test
public void notExistingEnumValueIsTreatedAsUnset() {
TestData data = gson.fromJson("{\"value\":\"FOUR\"}", TestData.class);
assertThat(data.value).isNull();
}
@Test
public void emptyEnumValueIsTreatedAsUnset() {
TestData data = gson.fromJson("{\"value\":\"\"}", TestData.class);
assertThat(data.value).isNull();
}
private static class TestData {
TestEnum value;
}
private enum TestEnum {
ONE,
TWO
}
}