Unable to set `:seed` when using `checking`

[bhb]

If checking fails, it fails prints the message:

Seed 1469058357988

However, unlike defspec, it isn't possible to pass the seed to checking to make it run the same series of tests.

Would you be interested in a PR that adds a version of checking that accepted a full set of quick-check options? That is, not only :seed, but also :max-size and :reporter-fn?

To preserve backwards compatibility, I think checking would need to have two forms. The old form would work as normal:

(deftest a-failing-test
  (checking "all ints lt 5" 100
    [i gen/int]
    (is (< i 5))))

but the new form would replace the integer with a map for all options

(deftest a-failing-test
  (checking "all ints lt 5" {:num-tests 100 :seed 1469058357988}
    [i gen/int]
    (is (< i 5))))

[gfredericks]

That sounds reasonable to me; that exact pattern is used in test.check itself somewhere I think

[nberger]

I could have used this a few weeks ago, so :+1: