Unit testing two dependent services and controller in AngularJS

I have a demo application where I have a controller which has a factory as dependency and factory itself depends on another service. My code is as follows:

var app = angular.module('sampleApp', ['ui.router']);

app.service("someServ", function(){
this.sendMsg = function(name){
    return "Hello " + name;
}
})

app.factory("appFactory", function ($http, someServ) {
function getData(url) {
    return $http.get(url);
} 

function foo(){
    var text = someServ.sendMsg("Monotype");
    alert(text);
}
return {
    getData : getData,
    foo : foo
}
})


var productsController = function ($scope, $http, appFactory) {
var pct = this;
pct.url = "http://ift.tt/1IGg6po";
var jsonDataPromise = appFactory.getData(pct.url);
jsonDataPromise
    .then(function (response) {
        pct.jsonData = response.data;
    }, function (err) {
        console.log("Error is: " + error);
    });
pct.profun = function(){
    appFactory.foo();
}
};
app.controller("productsController", productsController);

productsController.$inject = ['$scope', '$http', 'appFactory'];

I have to test with karma using Jasmine 2.4 as testing framework. I have tried many online tutorials but getting totally confused as everyone tries to do something different. Some use $provide to mock the service, some simply inject the actual service/factory and use a reference, some do not give any example of passing arguments to services.

Can someone please tell me how to do unit testing in simple terms. I have already tried doing something like this:

describe('unit testing of service and controller', function(){
beforeEach(module('sampleApp'));
var prodCtrl, $prodScope, mockfactory, mockservice;

beforeEach(function(){
    mockservice = {
        sendMsg : function(name){
            return name;
        }
    }

module(function($provide){
    $provide.value("someServ", mockservice);
});

inject(function($rootScope, $controller, $http, $q, appFactory){

    appFactory = appFactory;
    spyOn(appFactory, 'getData');
    spyOn(appFactory, 'foo');
    $prodScope = $rootScope.$new();
    prodCtrl = $controller('productsController', {
           $scope: $prodScope, $http: $http, appFactory:appFactory
        }); 
    });
});

it('appFactory has method getData and foo', function(){
    appFactory.getData();
    appFactory.foo();
    expect(appFactory.getData).toHaveBeenCalled();
    expect(appFactory.foo).toHaveBeenCalled();
})
it('productsController gets a promise back from getData', function(){
    var url = "sample url";
    var myPromise = prodCtrl.getData(url);
    myPromise.then(function(){console.log("Promise returned");})
})
it('foo calls service method sendMsg', function(){
    prodCtrl.profun();
    expect(mockservice.sendMsg).toHaveBeenCalled();
})
});