@Override
    protected void setUp() throws Exception {
        file1 = File.createTempFile("kuromoji_", ".txt");
        FileUtil.write(
                file1.getAbsolutePath(),
                "token1,seg1,reading1,pos1\ntoken2,seg2,reading2,pos2\ntoken3,seg3,reading3,pos3"
                        .getBytes(Constants.UTF_8));
    }

    @Override
    protected void tearDown() throws Exception {
        file1.delete();

        accessTokenHelper.setRandom(customRandom);

        final String token1 = accessTokenHelper.generateAccessToken();

        accessTokenHelper.setRandom(new Random(12345L));
        final String token2 = accessTokenHelper.generateAccessToken();

        assertEquals(token1, token2);
    }

    public void test_generateAccessToken_withCustomRandom() {