/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.maven.plugins.changes;

import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import junit.framework.TestCase;
import org.apache.maven.plugins.changes.model.Release;

/**
 * @author ltheussl
 */
public class FeedGeneratorTest extends TestCase {
    /**
     * Test of isSupportedFeedType method, of class FeedGenerator.
     */
    public void testIsSupportedFeedType() {
        final FeedGenerator generator = new FeedGenerator(Locale.ENGLISH);

        assertTrue("rss_0.9 not supported?", generator.isSupportedFeedType("rss_0.9"));
        assertTrue("rss_0.91N not supported?", generator.isSupportedFeedType("rss_0.91N"));
        assertTrue("rss_0.91U not supported?", generator.isSupportedFeedType("rss_0.91U"));
        assertTrue("rss_0.92 not supported?", generator.isSupportedFeedType("rss_0.92"));
        assertTrue("rss_0.93 not supported?", generator.isSupportedFeedType("rss_0.93"));
        assertTrue("rss_0.94 not supported?", generator.isSupportedFeedType("rss_0.94"));
        assertTrue("rss_1.0 not supported?", generator.isSupportedFeedType("rss_1.0"));
        assertTrue("rss_2.0 not supported?", generator.isSupportedFeedType("rss_2.0"));
        assertTrue("atom_0.3 not supported?", generator.isSupportedFeedType("atom_0.3"));
        assertTrue("atom_1.0 not supported?", generator.isSupportedFeedType("atom_1.0"));

        assertFalse(generator.isSupportedFeedType(""));
        assertFalse(generator.isSupportedFeedType(null));
        assertFalse(generator.isSupportedFeedType("rss"));
    }

    /**
     * Test of export method, of class FeedGenerator.
     *
     * @throws Exception if any.
     */
    public void testExport() throws Exception {
        final FeedGenerator generator = new FeedGenerator(Locale.ENGLISH);
        generator.setAuthor("author");
        generator.setTitle("title");
        generator.setLink("url");
        generator.setDateFormat(null);

        Release release = new Release();
        release.setVersion("1.0");
        List<Release> releases = new ArrayList<>(1);

        try {
            // test with no release: should fail
            generator.export(releases, "rss_0.9", new StringWriter(512));
            fail("0 releases not allowed!");
        } catch (IOException ex) {
            assertNotNull(ex);
        }

        releases.add(release);

        for (String type : generator.getSupportedFeedTypes()) {
            try (Writer writer = new StringWriter(512)) {
                generator.export(releases, type, writer);
                String result = writer.toString(); // TODO: save for inspection?
                assertNotNull(result);
                assertTrue(result.length() > 0);
            }
        }
    }
}