### Question:
NoopSpan extends Span { @Override public boolean isNoop() { return true; } NoopSpan(TraceContext context); @Override SpanCustomizer customizer(); @Override boolean isNoop(); @Override TraceContext context(); @Override Span start(); @Override Span start(long timestamp); @Override Span name(String name); @Override Span kind(Kind kind); @Override Span annotate(String value); @Override Span annotate(long timestamp, String value); @Override Span remoteServiceName(String remoteServiceName); @Override boolean remoteIpAndPort(String remoteIp, int port); @Override Span tag(String key, String value); @Override Span error(Throwable throwable); @Override void finish(); @Override void finish(long timestamp); @Override void abandon(); @Override void flush(); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void isNoop() { assertThat(span.isNoop()).isTrue(); }