@Test
void testApply() {

    final String actual = instance.apply(Level.DEBUG, "LOGGER_NAME", "Some message");
    assertTrue(actual.contains("DEBUG"));
    assertTrue(actual.contains("LOGGER_NAME"));
    assertTrue(actual.contains("Some message"));
    assertTrue(actual.contains("-"));
    assertTrue(actual.contains(":"));
    assertTrue(actual.contains("T"));
    assertTrue(actual.contains("Z"));
}