102 lines
3.2 KiB
Java
102 lines
3.2 KiB
Java
/*
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* Copyright (C) 2022 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 static org.junit.Assert.assertThrows;
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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.io.StringReader;
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import org.junit.Test;
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public class TypeAdapterTest {
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@Test
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public void testNullSafe() throws IOException {
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TypeAdapter<String> adapter =
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new TypeAdapter<String>() {
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@Override
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public void write(JsonWriter out, String value) {
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throw new AssertionError("unexpected call");
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}
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@Override
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public String read(JsonReader in) {
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throw new AssertionError("unexpected call");
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}
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}.nullSafe();
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assertThat(adapter.toJson(null)).isEqualTo("null");
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assertThat(adapter.fromJson("null")).isNull();
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}
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/**
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* Tests behavior when {@link TypeAdapter#write(JsonWriter, Object)} manually throws {@link
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* IOException} which is not caused by writer usage.
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*/
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@Test
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public void testToJson_ThrowingIOException() {
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final IOException exception = new IOException("test");
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TypeAdapter<Integer> adapter =
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new TypeAdapter<Integer>() {
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@Override
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public void write(JsonWriter out, Integer value) throws IOException {
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throw exception;
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}
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@Override
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public Integer read(JsonReader in) {
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throw new AssertionError("not needed by this test");
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}
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};
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JsonIOException e = assertThrows(JsonIOException.class, () -> adapter.toJson(1));
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assertThat(e).hasCauseThat().isEqualTo(exception);
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e = assertThrows(JsonIOException.class, () -> adapter.toJsonTree(1));
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assertThat(e).hasCauseThat().isEqualTo(exception);
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}
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private static final TypeAdapter<String> adapter =
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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);
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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();
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}
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};
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// Note: This test just verifies the current behavior; it is a bit questionable
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// whether that behavior is actually desired
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@Test
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public void testFromJson_Reader_TrailingData() throws IOException {
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assertThat(adapter.fromJson(new StringReader("\"a\"1"))).isEqualTo("a");
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}
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// Note: This test just verifies the current behavior; it is a bit questionable
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// whether that behavior is actually desired
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@Test
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public void testFromJson_String_TrailingData() throws IOException {
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assertThat(adapter.fromJson("\"a\"1")).isEqualTo("a");
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}
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}
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