/*
 * 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.wagon.providers.ssh.knownhost;

import java.io.File;

import junit.framework.TestCase;
import org.codehaus.plexus.util.FileUtils;

public class FileKnownHostsProviderTest extends TestCase {
    private File basedir = new File(System.getProperty("basedir", "."));

    private File testKnownHostsFile;

    private FileKnownHostsProvider provider;

    public void setUp() throws Exception {
        File readonlyKnownHostFile = new File(basedir, "src/test/resources/known_hosts");
        testKnownHostsFile = new File(basedir, "target/known_hosts");
        testKnownHostsFile.delete();
        FileUtils.copyFile(readonlyKnownHostFile, testKnownHostsFile);
        testKnownHostsFile.setLastModified(testKnownHostsFile.lastModified() - 60 * 1000);

        provider = new FileKnownHostsProvider(testKnownHostsFile);
    }

    public void testStoreKnownHostsNoChange() throws Exception {
        long timestamp = this.testKnownHostsFile.lastModified();
        // file with the same contents, but with entries swapped
        File sameKnownHostFile = new File(basedir, "src/test/resources/known_hosts_same");
        String contents = FileUtils.fileRead(sameKnownHostFile);

        provider.storeKnownHosts(contents);
        assertEquals("known_hosts file is rewritten", timestamp, testKnownHostsFile.lastModified());
    }

    public void testStoreKnownHostsWithChange() throws Exception {
        long timestamp = this.testKnownHostsFile.lastModified();
        File sameKnownHostFile = new File(basedir, "src/test/resources/known_hosts_same");
        String contents = FileUtils.fileRead(sameKnownHostFile);
        contents += "1 2 3";

        provider.storeKnownHosts(contents);
        assertTrue("known_hosts file is not rewritten", timestamp != testKnownHostsFile.lastModified());
    }
}