tzif: add help_tzif.fqtest

format/tzif/testdata/generate_fqtest.sh

@@ -49,6 +49,9 @@ tear_down() {
   if grep "error" ./*.fqtest; then
     exit 1
   fi
+
+  echo '$ fq -h tzif' > help_tzif.fqtest
+  ../../../fq -h tzif >> help_tzif.fqtest
 )
 
 result=0

format/tzif/testdata/help_tzif.fqtest

@@ -0,0 +1,29 @@
+$ fq -h tzif
+tzif: Time Zone Information Format decoder
+
+Decode examples
+===============
+
+  # Decode file as tzif
+  $ fq -d tzif . file
+  # Decode value as tzif
+  ... | tzif
+
+Get last transition time
+========================
+
+  fq '.v2plusdatablock.transition_times[-1] | tovalue' tziffile
+  
+Count leap second records
+=========================
+
+  fq '.v2plusdatablock.leap_second_records | length' tziffile
+  
+Authors
+=======
+- Takashi Oguma @bitbears-dev (https://github.com/bitbears-dev) @0xb17bea125 (https://twitter.com/0xb17bea125)
+
+References
+==========
+- https://datatracker.ietf.org/doc/html/rfc8536
+