### Question:
ApacheLogFormat implements AccessLogFormat { public String getFormat() { final StringBuilder builder = new StringBuilder(); for (Field field : fields) { builder.append(field.toString()); } return builder.toString(); } ApacheLogFormat(String format);  ApacheLogFormat(TimeZone timeZone, String format); @Override String format(Response response, Date timeStamp, long responseNanos); String getFormat(); static final String COMMON_FORMAT; static final String COMBINED_FORMAT; static final String VHOST_COMMON_FORMAT; static final String VHOST_COMBINED_FORMAT; static final String REFERER_FORMAT; static final String AGENT_FORMAT; static final ApacheLogFormat COMMON; static final ApacheLogFormat COMBINED; static final ApacheLogFormat VHOST_COMMON; static final ApacheLogFormat VHOST_COMBINED; static final ApacheLogFormat REFERER; static final ApacheLogFormat AGENT; static final ApacheLogFormat COMMON_UTC; static final ApacheLogFormat COMBINED_UTC; static final ApacheLogFormat VHOST_COMMON_UTC; static final ApacheLogFormat VHOST_COMBINED_UTC; static final ApacheLogFormat REFERER_UTC; static final ApacheLogFormat AGENT_UTC; }### Answer:
@Test public void testGetFormat() { assertFormat("%a"); assertFormat("%A"); assertFormat("%b"); assertFormat("%B"); assertFormat("%{Test-Cookie}C", "%{test-cookie}C"); assertFormat("%D"); assertFormat("%h"); assertFormat("%{remote}h", "%h"); assertFormat("%{local}h"); assertFormat("%H"); assertFormat("%{User-Agent}i", "%{user-agent}i"); assertFormat("%m"); assertFormat("%{Content-Type}o", "%{content-type}o"); assertFormat("%p"); assertFormat("%{local}p", "%p"); assertFormat("%{remote}p"); assertFormat("%q"); assertFormat("%r", "%m %U%q %H"); assertFormat("%s"); assertFormat("%T", "%T"); assertFormat("%{s}T", "%T"); assertFormat("%{sec}T", "%T"); assertFormat("%{secs}T", "%T"); assertFormat("%{second}T", "%T"); assertFormat("%{seconds}T", "%T"); assertFormat("%{m}T", "%{m}T"); assertFormat("%{milli}T", "%{m}T"); assertFormat("%{millis}T", "%{m}T"); assertFormat("%{millisec}T", "%{m}T"); assertFormat("%{millisecs}T", "%{m}T"); assertFormat("%{millisecond}T", "%{m}T"); assertFormat("%{milliseconds}T", "%{m}T"); assertFormat("%{micro}T", "%D"); assertFormat("%{micros}T", "%D"); assertFormat("%{microsec}T", "%D"); assertFormat("%{microsecs}T", "%D"); assertFormat("%{microsecond}T", "%D"); assertFormat("%{microseconds}T", "%D"); assertFormat("%{n}T", "%{n}T"); assertFormat("%{nano}T", "%{n}T"); assertFormat("%{nanos}T", "%{n}T"); assertFormat("%{nanosec}T", "%{n}T"); assertFormat("%{nanosecs}T", "%{n}T"); assertFormat("%{nanosecond}T", "%{n}T"); assertFormat("%{nanoseconds}T", "%{n}T"); assertFormat("%u"); assertFormat("%U"); assertFormat("%v"); assertFormat("%t"); assertFormat("%{HH:mm:ss.SSS}t"); assertFormat("%{@@HH:mm:ss}t"); assertFormat("%{@PST}t"); assertFormat("%{HH:mm:ss.SSS@PST}t"); assertFormat("%{@@HH:mm:ss@PST}t"); }