@Test
public void testSetTag_numberType() {

    Span result = undertest.setTag("a-key", 3);
    assertSame(result, undertest);
    verifyZeroInteractions(abstractTracer);
    assertNotNull(grpcSpan.getTagsList());
    assertEquals(1, grpcSpan.getTagsCount());
    assertEquals(KeyValue.newBuilder().setKey("a-key").setIntValue(3).build(), grpcSpan.getTags(0));
}