sinon.match.each ?

[cyrilchapon]

It would be very great to have a matcher that exactly act like sinon.match.has but on every enumerated value in an array / object

Use case :

          ...
          const res = httpMocks.createResponse();
          res.json = sinon.spy(res.json);

          return stuffController.listStuff(req, res, next)
          .then(function() {
            assert.calledWith(res.json, sinon.match.array);
            assert.calledWith(res.json, sinon.match.has('length', expectedStuff.length));
            assert.calledWith(res.json, sinon.match(function(result) {
              return _.every(result, function(stuff) {
                return stuff instanceof Stuff;
              });
            }, 'Every return object is an stuff'));
          });

That could be turned to

          ...
          const res = httpMocks.createResponse();
          res.json = sinon.spy(res.json);

          return stuffController.listStuff(req, res, next)
          .then(function() {
            assert.calledWith(res.json, sinon.match.array);
            assert.calledWith(res.json, sinon.match.has('length', expectedStuff.length));
            assert.calledWith(res.json, sinon.match.each(result, sinon.match.instanceOf(Stuff)));
          });

[cyrilchapon]

It could be named sinon.match.each, or lodash-like sinon.match.every

[cyrilchapon]

In addition, one could find useful to check that at least one enumerated value matches.
We could have sinon.match.some for this

[mroderick]

I think that would be a great addition to matchers.

My preference leans more towards using names that are more like Array.prototype.every and Array.prototype.some, than using lodash conventions. Keeping in mind just how inconsistent Sinon's API currently is, I don't think that preference matters that much.

[mroderick]

This has been implemented by #1661 and shipped as sinon@4.2.0