sinon-server-backend

An alternative implementation of Sinon.js fake server that provides expectations similar to AngularJS $httpBackend.

Installation

Include /lib/server.js file in your project.

Usage

Start and stop the fake server:

var server = sinonServerBackend.create();
    
// start using fake XMLHttpRequest
server.start();
    
// restore XMLHttpRequest global function
server.restore();

Setup a repeatable response:

server.when('GET', '/test').respond(200, 'some data');

Setup an expectation:

server.expect('GET', '/test').respond(200, 'some data');

Process pending requests:

server.flush();

Verify that all requests have been processed:

server.verifyNoOutstandingRequest();

Verify that all expectations have been processed:

server.verifyNoOutstandingExpectation();

Trained responses vs expectations

Trained responses are defined using when(), while expectations are defined using expect(). Trained responses simply return a pre-defined response to any number of requests. Expectation provides only a single response.

Expectations also need to be fulfilled in the order they are defined. If there is a pending expectation and a different request is made, then the fake server will throw an exception.

Also, when no response or expectation is defined and a request is made, the fake sever will throw an "unexpected request" exception.

Example

describe('using sinonServerBackend', function() {

    var server;

    beforeEach(function() {
        server = sinonServerBackend.create();
        // start using fake XMLHttpRequest
        server.start();
    });

    afterEach(function() {            
        // restore XMLHttpRequest global function
        server.restore();
    });

    it('provides repeatable responses', function() {
        server.when('GET', '/test').respond(200, 'some data');

        callTestApi();
        // success
        server.flush();
        
        callTestApi();
        // success again
        server.flush();
    });
   
    it('provides a single expected response', function() {
        server.expect('GET', '/test').respond(200, 'some data');

        callTestApi();
        server.flush();
        
        callTestApi();
        // will fail because the expectation has been fulfilled already, and 
        // the second call is seen as unexpected
        server.flush();
    });