| /* |
| * Copyright (C) 2018 Gson Authors |
| * |
| * 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.gson.functional; |
| |
| import java.io.IOException; |
| import java.util.regex.Pattern; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| import com.google.gson.TypeAdapter; |
| import com.google.gson.stream.JsonReader; |
| import com.google.gson.stream.JsonWriter; |
| |
| import junit.framework.TestCase; |
| |
| /** |
| * Functional tests to validate printing of Gson version on AssertionErrors |
| * |
| * @author Inderjeet Singh |
| */ |
| public class GsonVersionDiagnosticsTest extends TestCase { |
| private static final Pattern GSON_VERSION_PATTERN = Pattern.compile("(\\(GSON \\d\\.\\d\\.\\d)(?:[-.][A-Z]+)?\\)$"); |
| |
| private Gson gson; |
| |
| @Before |
| @Override |
| public void setUp() { |
| gson = new GsonBuilder().registerTypeAdapter(TestType.class, new TypeAdapter<TestType>() { |
| @Override public void write(JsonWriter out, TestType value) { |
| throw new AssertionError("Expected during serialization"); |
| } |
| @Override public TestType read(JsonReader in) throws IOException { |
| throw new AssertionError("Expected during deserialization"); |
| } |
| }).create(); |
| } |
| |
| @Test |
| public void testVersionPattern() { |
| assertTrue(GSON_VERSION_PATTERN.matcher("(GSON 2.8.5)").matches()); |
| assertTrue(GSON_VERSION_PATTERN.matcher("(GSON 2.8.5-SNAPSHOT)").matches()); |
| } |
| |
| @Test |
| public void testAssertionErrorInSerializationPrintsVersion() { |
| try { |
| gson.toJson(new TestType()); |
| fail(); |
| } catch (AssertionError expected) { |
| ensureAssertionErrorPrintsGsonVersion(expected); |
| } |
| } |
| |
| @Test |
| public void testAssertionErrorInDeserializationPrintsVersion() { |
| try { |
| gson.fromJson("{'a':'abc'}", TestType.class); |
| fail(); |
| } catch (AssertionError expected) { |
| ensureAssertionErrorPrintsGsonVersion(expected); |
| } |
| } |
| |
| private void ensureAssertionErrorPrintsGsonVersion(AssertionError expected) { |
| String msg = expected.getMessage(); |
| // System.err.println(msg); |
| int start = msg.indexOf("(GSON"); |
| assertTrue(start > 0); |
| int end = msg.indexOf("):") + 1; |
| assertTrue(end > 0 && end > start + 6); |
| String version = msg.substring(start, end); |
| // System.err.println(version); |
| assertTrue(GSON_VERSION_PATTERN.matcher(version).matches()); |
| } |
| |
| private static final class TestType { |
| @SuppressWarnings("unused") |
| String a; |
| } |
| } |