Empty warnings on score eq 1

[verkligheten]

I'm not really sure that's the right behavior when score of password equal to 1 and there are any warnings.

Zxcvbn.test('vika20021994')
=> #<Zxcvbn::Score:0x00007fc8ab3983e0
 @calc_time=0.002605999994557351,
 @crack_time=9176.328,
 @crack_time_display="4 hours",
 @entropy=27.451,
 @feedback=#<Zxcvbn::Feedback:0x00007fc8ab3a3920 @suggestions=["Add another word or two. Uncommon words are better."], @warning=nil>,
 @match_sequence=
  [#<Zxcvbn::Match pattern="bruteforce", i=0, j=0, token="v", entropy=5.169925001442312, cardinality=36>,
   #<Zxcvbn::Match matched_word="i", token="i", i=1, j=1, rank=2, pattern="dictionary", dictionary_name="english", base_entropy=1.0, uppercase_entropy=0.0, l33t_entropy=0, entropy=1.0>,
   #<Zxcvbn::Match pattern="bruteforce", i=2, j=2, token="k", entropy=5.169925001442312, cardinality=36>,
   #<Zxcvbn::Match matched_word="a", token="a", i=3, j=3, rank=5, pattern="dictionary", dictionary_name="english", base_entropy=2.321928094887362, uppercase_entropy=0.0, l33t_entropy=0, entropy=2.321928094887362>,
   #<Zxcvbn::Match i=4, j=7, token="2002", pattern="year", entropy=6.894817763307944>,
   #<Zxcvbn::Match i=8, j=11, token="1994", pattern="year", entropy=6.894817763307944>],
 @password="vika20021994",
 @score=1> 

Could you please clarify this behavior. Thanks

[formigarafa]

The way this tool gives feedback is a bit weird but it is works the same way the original was ported from (dropbox/zxcbn).
Even though the result is not the same as the original tool, the result and feedback format close to the original.

from: https://lowe.github.io/tryzxcvbn/
password: | vika20021994
guesses_log10: | 8.3105
score: | 3 / 4

It not always have a warning and/or a suggestion to give because they usually relate to the provided password and sometimes it just not match anything obviously bad to raise a suggestion or warning.

There may also be some implementation details that differ from the original and if you try another port, you may get something closer of what you expect.