Re: Controlling growth rates of generators with test.check
Thanks. That looks useful. On Jul 30, 2015 6:14 AM, "Mikera" wrote: > See: > > https://github.com/clojure/test.check/commit/d4883873df73717629272d0ab71619d7e58c9c9e > > On Wednesday, 29 July 2015 23:31:14 UTC+8, Mayank Jain wrote: >> >> Nice. Any updates on this? >> Is this a good idea? >> >> On Friday, May 15, 2015 at 12:13:06 PM UTC+5:30, Mikera wrote: >>> >>> Hi all, >>> >>> I am doing some generative testing with test.check and need a way to >>> control the growth rate of data structures (the regular linear growth >>> quickly makes the computations too large for meaningful testing usage). I >>> came up with the following solution to do this: >>> >>> (defn gen-resize >>> "Creates a generator that pre-modifies the 'size' pramater with the >>> function f. Use if you want to >>>have the size grow at a different rate from the normal linear >>> scaling." >>> ([f gen] >>> (let [gf (or (:gen gen) "gen paramter must be a test.check >>> generator") >>> new-gf (fn [rnd size] >>>(gf rnd (f size)))] >>> (clojure.test.check.generators.Generator. new-gf >>> >>> Normal O(n) growth: >>> >>> (gen/sample gen/s-pos-int 30) >>> => (1 2 3 2 4 5 4 7 6 3 3 7 10 4 8 11 14 12 6 10 9 1 8 21 12 16 25 25 21 >>> 6) >>> >>> Controlled O(sqrt(n)) growth: >>> >>> (gen/sample (gen-resize sqrt gen/s-pos-int) 30) >>> => (1 2 2 2 2 4 3 3 3 3 4 3 5 1 2 3 2 4 4 2 2 3 6 6 2 5 5 4 6 3) >>> >>> So it seems to work, but is this a sane / recommended approach? Am I >>> relying too much on test.check internals? >>> >>> mikera >>> >> -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Controlling growth rates of generators with test.check
See: https://github.com/clojure/test.check/commit/d4883873df73717629272d0ab71619d7e58c9c9e On Wednesday, 29 July 2015 23:31:14 UTC+8, Mayank Jain wrote: > > Nice. Any updates on this? > Is this a good idea? > > On Friday, May 15, 2015 at 12:13:06 PM UTC+5:30, Mikera wrote: >> >> Hi all, >> >> I am doing some generative testing with test.check and need a way to >> control the growth rate of data structures (the regular linear growth >> quickly makes the computations too large for meaningful testing usage). I >> came up with the following solution to do this: >> >> (defn gen-resize >> "Creates a generator that pre-modifies the 'size' pramater with the >> function f. Use if you want to >>have the size grow at a different rate from the normal linear scaling." >> ([f gen] >> (let [gf (or (:gen gen) "gen paramter must be a test.check generator") >> new-gf (fn [rnd size] >>(gf rnd (f size)))] >> (clojure.test.check.generators.Generator. new-gf >> >> Normal O(n) growth: >> >> (gen/sample gen/s-pos-int 30) >> => (1 2 3 2 4 5 4 7 6 3 3 7 10 4 8 11 14 12 6 10 9 1 8 21 12 16 25 25 21 >> 6) >> >> Controlled O(sqrt(n)) growth: >> >> (gen/sample (gen-resize sqrt gen/s-pos-int) 30) >> => (1 2 2 2 2 4 3 3 3 3 4 3 5 1 2 3 2 4 4 2 2 3 6 6 2 5 5 4 6 3) >> >> So it seems to work, but is this a sane / recommended approach? Am I >> relying too much on test.check internals? >> >> mikera >> > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Controlling growth rates of generators with test.check
Nice. Any updates on this? Is this a good idea? On Friday, May 15, 2015 at 12:13:06 PM UTC+5:30, Mikera wrote: > > Hi all, > > I am doing some generative testing with test.check and need a way to > control the growth rate of data structures (the regular linear growth > quickly makes the computations too large for meaningful testing usage). I > came up with the following solution to do this: > > (defn gen-resize > "Creates a generator that pre-modifies the 'size' pramater with the > function f. Use if you want to >have the size grow at a different rate from the normal linear scaling." > ([f gen] > (let [gf (or (:gen gen) "gen paramter must be a test.check generator") > new-gf (fn [rnd size] >(gf rnd (f size)))] > (clojure.test.check.generators.Generator. new-gf > > Normal O(n) growth: > > (gen/sample gen/s-pos-int 30) > => (1 2 3 2 4 5 4 7 6 3 3 7 10 4 8 11 14 12 6 10 9 1 8 21 12 16 25 25 21 6) > > Controlled O(sqrt(n)) growth: > > (gen/sample (gen-resize sqrt gen/s-pos-int) 30) > => (1 2 2 2 2 4 3 3 3 3 4 3 5 1 2 3 2 4 4 2 2 3 6 6 2 5 5 4 6 3) > > So it seems to work, but is this a sane / recommended approach? Am I > relying too much on test.check internals? > > mikera > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Controlling growth rates of generators with test.check
Hi all, I am doing some generative testing with test.check and need a way to control the growth rate of data structures (the regular linear growth quickly makes the computations too large for meaningful testing usage). I came up with the following solution to do this: (defn gen-resize "Creates a generator that pre-modifies the 'size' pramater with the function f. Use if you want to have the size grow at a different rate from the normal linear scaling." ([f gen] (let [gf (or (:gen gen) "gen paramter must be a test.check generator") new-gf (fn [rnd size] (gf rnd (f size)))] (clojure.test.check.generators.Generator. new-gf Normal O(n) growth: (gen/sample gen/s-pos-int 30) => (1 2 3 2 4 5 4 7 6 3 3 7 10 4 8 11 14 12 6 10 9 1 8 21 12 16 25 25 21 6) Controlled O(sqrt(n)) growth: (gen/sample (gen-resize sqrt gen/s-pos-int) 30) => (1 2 2 2 2 4 3 3 3 3 4 3 5 1 2 3 2 4 4 2 2 3 6 6 2 5 5 4 6 3) So it seems to work, but is this a sane / recommended approach? Am I relying too much on test.check internals? mikera -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
