sapui5_stubbing_sinon.js

//learning Qunit testing in here!
sap.ui.define([
	"com/sodogan/manage_products/test/unit/helper/FakeI18nModel",
	"sap/ui/model/resource/ResourceModel",
	"sap/ui/base/ManagedObject",
	"com/sodogan/manage_products/model/formatter",
	"sap/ui/thirdparty/sinon",
	"sap/ui/thirdparty/sinon-qunit"
], function (FakeI18nModel, ResourceModel,ManagedObject, formatter) {
	"use strict";
	const MAIL_DELIVERY = 'Delivery By Mail';
	const PARCEL_DELIVERY = 'Delivery By Parcel';
	const FREIGHT_DELIVERY = 'Delivery By Freight';
	const KG = "KG";

	/* formatter.delivery has dependancy to getModel and getResourceBundle
	 * getResourceBundle also calls getText()
	 * So we need a way to mock the 
	 *	delivery: function (sMeasure, iWeight) {
			var oModel = this.getModel("i18n");
            debugger;
				var  oResourceBundle = oModel.getResourceBundle(),
				sResult = "";
			if (sMeasure === "G") {
				iWeight = iWeight / 1000;
			}
			if (iWeight < 0.5) {
				sResult = oResourceBundle.getText("deliveryByMail");
			} else if (iWeight < 5) {
				sResult = oResourceBundle.getText("deliveryByParcel");
			} else {
				sResult = oResourceBundle.getText("deliveryByFreight");
			}

			return sResult;
		},
		*/
	QUnit.module("Delivery", {
		beforeEach: function () {
			//Now create a fake controller which will have a getModel method
			console.log('Inside beforeEach');
			var fakeResourceModel = new FakeI18nModel({
				deliveryByMail: "Delivery By Mail",
				deliveryByParcel: "Delivery By Parcel",
				deliveryByFreight: "Delivery By Freight"
			});

			//When its calle with i18n args it will return the fake Resouce which is ours!
			/* You can use  this fake controller or a managedObject is fine too
			var fakeController = {
				getModel: function () {
					//empty 
				}
			};
			*/
			var fakeController = new ManagedObject({});
            //intercept the getModel method and return a Fake ResouceModel 
			this._stub = sinon.stub(fakeController, "getModel").withArgs("i18n").returns(fakeResourceModel);
					//bind the function to the fakeController!
			this._fnFakeDelivery = formatter.delivery.bind(fakeController);
		},
		afterEach: function () {
			console.log('Inside afterEach');
			this._fnFakeDelivery = null;
		}
	});

	/* 
	 * Using the FakeModel which is created for testing as  a Fake model
	 * Notice that its is required
	 */
	QUnit.test("O.1 KG will be delivered by Mail", function (assert) {
		//Given
		//When
		let actual = this._fnFakeDelivery("KG", 0.2);
		//Then
		let expected = MAIL_DELIVERY;
		assert.strictEqual(actual, expected, "Should be Mail delivery");
		//Make sure that spy is called!
		//Then-check its called once!
		sinon.assert.calledOnce(this._stub);
		//check that
		assert.ok(this._stub.calledWith("i18n"), "Check the arg");
	});

	/* 
	 * Using our own ResourceModel which is created for testing as  a Fake model
	 * Notice that its is required
	 */
	QUnit.test("O.5 KG will be delivered by Mail", function (assert) {
		//Given
		//When
		var fakeResourceModel = new ResourceModel({
			bundleName: "com.sodogan.manage_products.i18n.i18n"
		});

		//debugger;
		var fakeController = Object.create(null);
		//When its calle with i18n args it will return the fake Resouce which is ours!
		fakeController.getModel = sinon.stub().withArgs("i18n").returns(fakeResourceModel);

		//bind the function to the fakeController!
		var fakeDelivery = formatter.delivery.bind(fakeController);
		let actual = fakeDelivery("KG", 0.2);
		//Then
		let expected = MAIL_DELIVERY;
		assert.strictEqual(actual, expected, "Should be Mail delivery");
	});

});