@Test
public void dumpsAllThreads() {

    final ByteArrayOutputStream output = new ByteArrayOutputStream();
    threadDump.dump(output);
    assertThat(output.toString())
        .isEqualTo(String.format("\"runnable\" id=100 state=RUNNABLE%n" +
            "    at Blah.blee(Blah.java:100)%n" +
            "%n" +
            "%n"));
}