Compare Maps and Sets

[mattiasholmlund]

@substack wrote in tape-testing/tape#342:

Once this is merged into core I will release a new major version of deep-equal based on the new algorithm that tape can be updated to support.

As far as I can see, node 8 has a deepEqual that can properly compare Maps and Sets:

node-v8.9.4-linux-x64 $ ./bin/node
> const assert = require('assert')
undefined
> assert.deepEqual(new Set('a'), new Set('a'))
undefined
> assert.deepEqual(new Set('a'), new Set('b'))
AssertionError [ERR_ASSERTION]: Set { 'a' } deepEqual Set { 'b' }
>

I find Sets and Maps very useful and want to use them with t.deepEqual() in tape.

[kumavis]

+1 to this feature, and seeing it get into tape

[simoelmou]

+1 to this feature