@Before
  public void before() throws Exception {
    directory = temporaryFolder.getRoot();
    pidFile = new File(directory, "pid.txt");
    pidFileName = pidFile.getName();
    pid = identifyPid();
  }
Functional integration tests for {@link PidFile}.

@since GemFire 8.2
geode-core/src/integrationTest/java/org/apache/geode/internal/process/PidFileIntegrationTest.java