Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be considered part of the public API, and thus is subject to change.

Utils API


Creates a new object with the given function as the protoype and stubs all implemented functions.

class Container {
  contains(item) {
    /* ... */

var stubContainer = sinon.createStubInstance(Container);

The given constructor function is not invoked. See also the stub API.