Salesforce Apex http callout test helper and example

FullMultiMock.cls

public class FullMultiMock implements HttpCalloutMock {

		private integer urlCount { get; set; }
		private List<MockCallout> mockCallouts {get; set;}
		
		public FullMultiMock(List<MockCallout> callouts){
			system.debug('callouts : ' + callouts);
			mockCallouts = callouts;
			urlCount = 0;
		}
		
		public HTTPResponse respond(HTTPRequest request){
			HTTPResponse response = new HTTPResponse();
			response.setHeader('Content-Type', 'application/json'); //this could be changed to a variable per call
			
			MockCallout callout = mockCallouts[urlCount];
			
			system.assert(callout.HttpMethod == request.getMethod(), 'HttpMethod mismatch on #' + (urlCount + 1)  + ', was expecting ' + request.getMethod());
				
			if (callout.HttpMethod == 'POST')
				System.Assert(callout.PayloadBody == request.getBody(), 'callout number : ' + urlCount + ' bad post data -- expected :' + callout.PayloadBody + ' actual : ' + request.getBody());	
			
			System.Assert(callout.ExpectedUrl == request.getEndpoint(), 'callout number : ' + urlCount + ' actual endpoint : ' + request.getEndpoint() + ' expected : ' + callout.ExpectedUrl);
				
			response.setBody(callout.ReturnBody);
			response.setStatusCode(callout.ReturnStatusCode);
			
			urlCount++;
			return response;
		}
		
		public void AssertAllCallsMade(){
		  System.assert(urlCount == mockCallouts.size(), 'not all expected callouts were made.  Expected : ' + mockCallouts.size() + ' actual : ' + urlCount);
		}
	}

MockCallout.cls

public class MockCallout {
		
		public MockCallout(String returnBody, String expectedUrl, String payloadBody, String httpMethod, Integer returnStatusCode){
			this.ReturnBody = returnBody;
			this.ExpectedUrl = expectedUrl;
			this.PayloadBody = payloadBody;
			this.ReturnStatusCode = returnStatusCode;
			this.HttpMethod = httpMethod;
		}
		
		public String ReturnBody {get;set;}
		public String ExpectedUrl {get;set;}
		public String PayloadBody {get;set;}
		public String HttpMethod {get;set;}
		public Integer ReturnStatusCode {get;set;}
		
}

TestUseExample.cls

@isTest
public class TestUseExample {

  static testMethod void ExampleUse(){
    	MockCallout getJson = new MockCallout('{ "data": "json return data" }', //return data
					      '/user/100'			//url expected
					      ''				//payload data
					      'GET', 200)			//verb and response code
    	
    	MockCallout updateUser = new MockCallout('{ "data": "updated json" }',
						 '/user/100',
						 '{ "name" : "json" }',
						 'POST', 200);
    	
    	FullMultiMock mocks = new FullMultiMock(new MockCallout[]{ getJson, updateUser });
    	
    	Test.setMock(HttpCalloutMock.class, mocks);
    	
    	//some httprequest/response/do stuff code gets called here
    	
    	//test class assert
    	
    	mocks.AssertAllCallsMade();
  }

}