98 lines
3.1 KiB
Java
98 lines
3.1 KiB
Java
/*
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* Copyright (C) 2018 Gson Authors
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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.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.util.regex.Pattern;
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import org.junit.Before;
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import org.junit.Test;
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/**
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* Functional tests to validate printing of Gson version on AssertionErrors
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*
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* @author Inderjeet Singh
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*/
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public class GsonVersionDiagnosticsTest {
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// We require a patch number, even if it is .0, consistent with https://semver.org/#spec-item-2.
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private static final Pattern GSON_VERSION_PATTERN =
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Pattern.compile("(\\(GSON \\d\\.\\d+\\.\\d)(?:[-.][A-Z]+)?\\)$");
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private Gson gson;
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@Before
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public void setUp() {
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gson = new GsonBuilder().registerTypeAdapter(TestType.class, new TypeAdapter<TestType>() {
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@Override public void write(JsonWriter out, TestType value) {
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throw new AssertionError("Expected during serialization");
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}
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@Override public TestType read(JsonReader in) throws IOException {
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throw new AssertionError("Expected during deserialization");
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}
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}).create();
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}
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@Test
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public void testVersionPattern() {
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assertThat(GSON_VERSION_PATTERN.matcher("(GSON 2.8.5)").matches()).isTrue();
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assertThat(GSON_VERSION_PATTERN.matcher("(GSON 2.8.5-SNAPSHOT)").matches()).isTrue();
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}
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@Test
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public void testAssertionErrorInSerializationPrintsVersion() {
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try {
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gson.toJson(new TestType());
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fail();
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} catch (AssertionError expected) {
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ensureAssertionErrorPrintsGsonVersion(expected);
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}
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}
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@Test
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public void testAssertionErrorInDeserializationPrintsVersion() {
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try {
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gson.fromJson("{'a':'abc'}", TestType.class);
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fail();
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} catch (AssertionError expected) {
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ensureAssertionErrorPrintsGsonVersion(expected);
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}
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}
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private void ensureAssertionErrorPrintsGsonVersion(AssertionError expected) {
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String msg = expected.getMessage();
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// System.err.println(msg);
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int start = msg.indexOf("(GSON");
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assertThat(start > 0).isTrue();
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int end = msg.indexOf("):") + 1;
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assertThat(end > 0 && end > start + 6).isTrue();
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String version = msg.substring(start, end);
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// System.err.println(version);
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assertThat(GSON_VERSION_PATTERN.matcher(version).matches()).isTrue();
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}
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private static final class TestType {
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@SuppressWarnings("unused")
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String a;
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}
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}
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