gen.array(gen.any) takes super long

[Jethro Larson]

Single test (using mocha-testcheck) that takes gen.array(gen.any) never completes. Mocha times out the browser locks up. Are these not safe to use together?

[Lee Byron]

It would be helpful if you could provide a more complete failing test case.

The following test seems to complete in <5ms

❯ time node -p "var {gen, sample} = require('testcheck'); sample(gen.array(gen.any));"

[ [],
  [],
  [ [ [Array] ] ],
  [ [ [Object], [Object] ] ],
  [ {}, {}, [ false ] ],
  [ [ [Object] ], { '9Q': [Object], Y4w: [] } ],
  [ { d: [] } ],
  [ { '4': [Object], Nie: {} }, [], [ [Array] ], {}, { QI: [] } ],
  [ { '1': [Array] },
    { mH: [Object], j: [Object] },
    [ [Array], {} ],
    [ [Array] ],
    { FI: [Array], Tn: [] } ],
  [ {}, { '6E': 6 }, {}, {}, { YX9: [Object], BA: {} } ] ]
node -p   0.19s user 0.04s system 108% cpu 0.215 total

Note that gen.any produces values which may include nested arrays and objects. Objects are particularly expensive to generate since the key strings are randomly generated as well.

[Jethro Larson]

Maybe it's something to do with mocha. I'll see if I still have that branch somewhere

[Lee Byron]

I'm going to close this issue for now - but feel free to re-open if you come across a reproducible case we can look at together.