82 lines
3.1 KiB
Java
82 lines
3.1 KiB
Java
/*
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* Copyright (C) 2021 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.functional;
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import static com.google.common.truth.Truth.assertThat;
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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 com.google.gson.JsonIOException;
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import com.google.gson.JsonSyntaxException;
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import com.google.gson.TypeAdapter;
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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.lang.reflect.ReflectPermission;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.security.Permission;
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import java.util.Collections;
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import java.util.concurrent.atomic.AtomicBoolean;
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import org.junit.Test;
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public class ReflectionAccessTest {
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@SuppressWarnings("unused")
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private static class ClassWithPrivateMembers {
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private String s;
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private ClassWithPrivateMembers() {
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}
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}
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/**
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* Test serializing an instance of a non-accessible internal class, but where
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* Gson supports serializing one of its superinterfaces.
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*
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* <p>Here {@link Collections#emptyList()} is used which returns an instance
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* of the internal class {@code java.util.Collections.EmptyList}. Gson should
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* serialize the object as {@code List} despite the internal class not being
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* accessible.
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*
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* <p>See https://github.com/google/gson/issues/1875
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*/
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@Test
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public void testSerializeInternalImplementationObject() {
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Gson gson = new Gson();
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String json = gson.toJson(Collections.emptyList());
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assertThat(json).isEqualTo("[]");
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// But deserialization should fail
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Class<?> internalClass = Collections.emptyList().getClass();
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JsonIOException exception = assertInaccessibleException("[]", internalClass);
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// Don't check exact class name because it is a JDK implementation detail
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assertThat(exception).hasMessageThat().startsWith("Failed making constructor '");
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assertThat(exception).hasMessageThat().contains("' accessible; either increase its visibility or"
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+ " write a custom InstanceCreator or TypeAdapter for its declaring type: ");
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}
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@Test
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public void testInaccessibleField() {
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JsonIOException exception = assertInaccessibleException("{}", Throwable.class);
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// Don't check exact field name because it is a JDK implementation detail
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assertThat(exception).hasMessageThat().startsWith("Failed making field 'java.lang.Throwable#");
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assertThat(exception).hasMessageThat().contains("' accessible; either increase its visibility or"
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+ " write a custom TypeAdapter for its declaring type.");
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}
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}
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