org.jsonschema2pojo.integration.CompilerWarningIT.java Source code

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Here is the source code for org.jsonschema2pojo.integration.CompilerWarningIT.java

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/**
 * Copyright  2010-2014 Nokia
 *
 * 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 org.jsonschema2pojo.integration;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import org.apache.commons.io.output.NullWriter;
import org.hamcrest.FeatureMatcher;
import org.hamcrest.Matcher;
import org.hamcrest.Matchers;
import org.jsonschema2pojo.integration.util.Compiler;
import org.jsonschema2pojo.integration.util.Jsonschema2PojoRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import javax.tools.Diagnostic;
import javax.tools.Diagnostic.Kind;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import static org.jsonschema2pojo.integration.util.CodeGenerationHelper.config;

import static org.hamcrest.Matchers.*;
import static org.hamcrest.MatcherAssert.*;

/**
 * <p>Tests looking for warning coming from generated output.</p>
 *
 * <p>Notes: The eclipse compiler used in these tests has an open issue with the SuppressWarnings annotation.  As a result, some warnings must be
 * accepted here that would not be present in practice.
 * <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=469725">Bug 469725 - ECJ compiler: @SuppressWarnings annotation is ignored when ecj is invoked via java compiler tool API</a>
 * </p>
 *
 * @author Christian Trimble
 *
 */
@RunWith(Parameterized.class)
public class CompilerWarningIT {
    @Rule
    public Jsonschema2PojoRule schemaRule = new Jsonschema2PojoRule().captureDiagnostics();

    @Parameters(name = "{0}")
    public static Collection<Object[]> parameters() {
        JavaCompiler systemJavaCompiler = Compiler.systemJavaCompiler();
        JavaCompiler eclipseCompiler = Compiler.eclipseCompiler();
        return Arrays.asList(new Object[][] { { "includeAccessorsWithSystemJavaCompiler", systemJavaCompiler,
                config("includeDynamicAccessors", true), "/schema/dynamic/parentType.json", Matchers.empty() },
                { "includeAccessorsWithEclipseCompiler", eclipseCompiler, config("includeDynamicAccessors", true),
                        "/schema/dynamic/parentType.json", onlyCastExceptions() } });
    }

    private JavaCompiler compiler;
    private Map<String, Object> config;
    private String schema;
    private Matcher<List<Diagnostic<? extends JavaFileObject>>> matcher;

    public CompilerWarningIT(String label, JavaCompiler compiler, Map<String, Object> config, String schema,
            Matcher<List<Diagnostic<? extends JavaFileObject>>> matcher) {
        this.compiler = compiler;
        this.config = config;
        this.schema = schema;
        this.matcher = matcher;
    }

    @Test
    public void checkWarnings() {
        schemaRule.generate(schema, "com.example", config);
        schemaRule.compile(compiler, new NullWriter(), new ArrayList<File>(), config);

        List<Diagnostic<? extends JavaFileObject>> warnings = warnings(schemaRule.getDiagnostics());

        assertThat(warnings, matcher);
    }

    public static List<Diagnostic<? extends JavaFileObject>> warnings(
            List<Diagnostic<? extends JavaFileObject>> all) {
        List<Diagnostic<? extends JavaFileObject>> warnings = new ArrayList<Diagnostic<? extends JavaFileObject>>();
        for (Diagnostic<? extends JavaFileObject> entry : all) {
            if (entry.getKind() == Kind.WARNING) {
                warnings.add(entry);
            }
        }
        return warnings;
    }

    public static Matcher<Iterable<Diagnostic<? extends JavaFileObject>>> onlyCastExceptions() {
        return Matchers.everyItem(hasMessage(containsString("Type safety: Unchecked cast from")));
    }

    public static Matcher<Diagnostic<? extends JavaFileObject>> hasMessage(Matcher<String> messageMatcher) {
        return new FeatureMatcher<Diagnostic<? extends JavaFileObject>, String>(messageMatcher, "message",
                "message") {
            @Override
            protected String featureValueOf(Diagnostic<? extends JavaFileObject> actual) {
                return actual.getMessage(Locale.ENGLISH);
            }
        };
    }
}