@Test
public void testNullSpanContext() throws NullPointerException {

    val testChildSpan = noOpsTracer.buildSpan("testOperationName");
    SpanContext testNullSpanContext = null;
    when(tracer.buildSpan("testOperationName")).thenReturn(testChildSpan);
    val resultSpan = utilUnderTest.startSpan("testOperationName", testNullSpanContext);
    Assert.assertEquals("testOperationName", resultSpan.getOperationName());
}