@Test
public void testExecute() throws MojoExecutionException, IOException {

    // PREPARE
    final EventStoreCertificateMojo testee = new EventStoreCertificateMojo();
    final File p12File = File.createTempFile("EventStoreCertificateMojoTest-", ".p12");
    testee.setCertificateFile(p12File.toString());
    // TEST
    testee.execute();
    // VERIFY
    assertThat(p12File).exists();
    assertThat(p12File.length()).isGreaterThan(0);
}