I have
data Tweet = Tweet {
user :: String,
text :: String,
retweets :: Double
} deriving (Show)
data TweetSet = NoTweets | SomeTweets Tweet TweetSet TweetSet
and trying to create some generators for testing, with
instance Arbitrary Tweet where
arbitrary = liftM3 Tweet arbitrary arbitrary arbitrary
instance Arbitrary TweetSet where
arbitrary = sized set'
where set' 0 = return NoTweets
set' n | n>0 = oneof[return NoTweets, liftM3 SomeTweets
arbitrary subTweets subTweets]
where subTweets = set' (n `div` 2)
but wondering how I would go about generating a random TweetSet that
contains a known random Tweet I later have reference to and I would also
assume the known Tweet to be placed randomly.
Then I could test a contains function.
Thanks
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