Trying to create 'numerical keys' for an array using .then method is not working

[lavanyaac]

Issue:

I'm trying to create a non-numerical keys for the array and it is not working on the latest master(build on 04-14-2018 - testcheck@^1.0.0-rc.2). Seems like it used to work for the old code that is published to npm.

Working Example on the console of 'http://leebyron.com/testcheck-js ':

const arr = gen.array(gen.int,{size:10})

const oneMoreArr = arr.then(val => {
val['foo'] = ()=> console.log('Hello')
return val;
});
sampleOne(oneMoreArr2)
sampleOne(oneMoreArr2).foo();

Output:

sampleOne(oneMoreArr2)

[7, 3, 29, 10, 16, -29, 4, -14, 23, 19, foo: ƒ]

sampleOne(oneMoreArr2).foo();

Hello
=====================================================================
For the same code output on the master build from 04-14-2018 (testcheck@^1.0.0-rc.2)

---

sampleOne(oneMoreArr2)

[[ 18, -29, -28, 27, -14, -11, -3, -16, -27, -10 ] - (missing key 'foo')

sampleOne(oneMoreArr2).foo();

undefined - (expected hello to be logged)

[leebyron]

Thanks for reporting this! This seems like a bug since the master build now clones values returned from .then() to avoid mutation cross-affecting tests, and the clone behavior for Arrays only includes array indices and doesn't consider non-numeric keys.

You should be able to work around this in the meantime by changing return val; to return gen.return(val);

[lavanyaac]

Thanks for the work around.