@Test
public void testGetProperty() {

    String expected = "false";
    setProperty(PrometheusMetricFactory.ENABLE_PROP, expected);
    String prop = PrometheusMetricFactory.getProperty(PrometheusMetricFactory.ENABLE_PROP, "true");
    clearProperty(PrometheusMetricFactory.ENABLE_PROP);
    // assertions
    Assert.assertEquals(prop, expected);
}