@Test
public void testSetTag_Tag() {

    Span result = undertest.setTag(Tags.COMPONENT, "mytest");
    assertSame(result, undertest);
    verifyZeroInteractions(abstractTracer);
    assertNotNull(grpcSpan.getTagsList());
    assertEquals(1, grpcSpan.getTagsCount());
    assertEquals(KeyValue.newBuilder().setKey(Tags.COMPONENT.getKey()).setStringValue("mytest").build(),
            grpcSpan.getTags(0));
}