@Test
  public void readingNullFileThrowsNullPointerException() throws Exception {
    // arrange
    pidFile = null;

    // act/assert
    assertThatThrownBy(() -> new PidFile(pidFile).readPid())
        .isInstanceOf(NullPointerException.class);
  }
Functional integration tests for {@link PidFile}.

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