Testing Jasmine spies

alt-method.js

it('can call a callback that is passed', function () {

	let callback = jasmine.createSpy('callback function');

	let putItem = jasmine.createSpy().and.callFake((params, cb) => {
		expect(params.id).not.toBeUndefined();
		cb('done');
	});

	putItem({ id: 1 }, callback);

	expect(callback).toHaveBeenCalledWith('done');

});

spies.js

describe('spying', () => {

	it('calls callback passed to it', function () {
		let data = {
			Item: {
				CameraID: '213c',
				LocationName: 'Testing spies'
			}
		};
		let docClient = {
			get(params, cb) {
				expect(params.TableName).toEqual(jasmine.any(String));
				expect(params.Key.HashKey).toEqual(jasmine.any(String));
				cb(null, data);
			}
		};

		spyOn(docClient, 'get').and.callThrough();

		let params = {
			TableName: 'testTable',
			Key: {
				HashKey: 'hash'
			}
		};
		let callback = jasmine.createSpy();

		docClient.get(params, callback);

		expect(callback).toHaveBeenCalledWith(null, data);
	});
});