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Stubs → = spies++, en gros permet de contrôler le comportement d'une fonction en particulier.

// order-spec.js

(...)

this.console = (...);

this.warehouse = {
  packageAndShip: sinon.stub().yelds(0123456789) // la fonction yelds va invoquer le callback refilé lors de l'appelle de packageAndShip //0123456789 = faux tracking number attendu
}


order.__set__("inventoryData", this.testData);
order.__set__("console", this.console);
order.__set__("warehouse", this.warehouse);
(...)

it("order (...), function() { (...) });

describe("Warehouse interaction", function() {
  beforeEach(function() {
  this.callback = sinon.spy();
    order.orderItem("CCC", 2, this.callback);
  });
  it("receive a tracking number", function() {
    expect(this.callback.calledWith(0123456789).to.equal(true);
  });
  it("call packageAndShip with the correct sku and quantity", function() {
    expect(this.warehouse.packageAndShip.calledWith("CCC", 2)).to.equal(true);;
  });
  
});