org.sonar.home.cache.FileHashesTest.java Source code

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Here is the source code for org.sonar.home.cache.FileHashesTest.java

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/*
 * Sonar, open source software quality management tool.
 * Copyright (C) 2008-2012 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * Sonar is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * Sonar is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Sonar; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.home.cache;

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.rules.TemporaryFolder;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.security.SecureRandom;

import static org.fest.assertions.Assertions.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class FileHashesTest {

    SecureRandom secureRandom = new SecureRandom();

    @Rule
    public ExpectedException thrown = ExpectedException.none();

    @Rule
    public TemporaryFolder temp = new TemporaryFolder();

    @Test
    public void test_md5_hash() {
        assertThat(hash("sonar")).isEqualTo("d85e336d61f5344395c42126fac239bc");

        // compare results with commons-codec
        for (int index = 0; index < 100; index++) {
            String random = randomString();
            assertThat(hash(random)).as(random).isEqualTo(DigestUtils.md5Hex(random).toLowerCase());
        }
    }

    @Test
    public void test_toHex() {
        // lower-case
        assertThat(FileHashes.toHex("aloa_bi_bop_a_loula".getBytes()))
                .isEqualTo("616c6f615f62695f626f705f615f6c6f756c61");

        // compare results with commons-codec
        for (int index = 0; index < 100; index++) {
            String random = randomString();
            assertThat(FileHashes.toHex(random.getBytes())).as(random)
                    .isEqualTo(Hex.encodeHexString(random.getBytes()).toLowerCase());
        }
    }

    @Test
    public void fail_if_file_does_not_exist() throws IOException {
        File file = temp.newFile("does_not_exist");
        FileUtils.forceDelete(file);

        thrown.expect(IllegalStateException.class);
        thrown.expectMessage("Fail to compute hash of: " + file.getAbsolutePath());

        new FileHashes().of(file);
    }

    @Test
    public void fail_if_stream_is_closed() throws Exception {
        thrown.expect(IllegalStateException.class);
        thrown.expectMessage("Fail to compute hash");

        InputStream input = mock(InputStream.class);
        when(input.read(any(byte[].class), anyInt(), anyInt())).thenThrow(new IllegalThreadStateException());
        new FileHashes().of(input);
    }

    private String randomString() {
        return new BigInteger(130, secureRandom).toString(32);
    }

    private String hash(String s) {
        InputStream in = new ByteArrayInputStream(s.getBytes());
        try {
            return new FileHashes().of(in);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }
}