'use strict';

var keys = require('object-keys');

var forEach = require('foreach');

var indexOf = require('array.prototype.indexof');

module.exports = function diffOperations(actual, expected, expectedMissing) {

var actualKeys = keys(actual);

var expectedKeys = keys(expected);

var extra = [];

var missing = [];

forEach(actualKeys, function (op) {

if (!(op in expected)) {

extra.push(op);

} else if (indexOf(expectedMissing, op) !== -1) {

extra.push(op);

}

});

forEach(expectedKeys, function (op) {

if (typeof actual[op] !== 'function' && indexOf(expectedMissing, op) === -1) {

missing.push(op);

}

});

return { missing: missing, extra: extra };

};