FeatureRequest: nested property matcher

[servel333]

Request to add this function signature: sinon.match.hasNested(keypath, expected)

where keypath functions like Lodash.get supporting "outer.inner" or "outer[inner]".

Turning this syntax into this syntax

sinon.match.has('outer', sinon.match.has('middle', sinon.match.has('inner', sinon.match.string)));
sinon.match.hasNested('outer.middle.inner', sinon.match.string);

Personally, I would prefer has supported nested keypaths, but that would probably break backwards compatibility. The implementation is simple if the addition of the lodash.get library is acceptable.

const get = require("lodash.get");

match.hasNested = createPropertyMatcher(function (actual, property) {
    return get(actual, property) !== undefined;
}, "hasNested");

[fatso83]

lodash.get is about 6k (2k gzipped), but we are not required to load in microseconds, so that should be fine. If you can supply a PR, that would be welcome.

[servel333]

I would propose a custom implementation but I doubt it would have any benefits over a mature library like Lodash. I'll make a PR.

[mroderick]

This was fixed with #1560