In protractor is it possible to use a spec under a spec?

Question

I've a login-spec.js like below:

describe('user should login with given credentials', function() {
 beforeEach(function() {
   browser.waitForAngular();
 });

 it('Get page title', function() {
   browser.driver.getTitle().then(function(text){console.log(text);});
   expect(browser.getTitle()).toEqual('abc','therefore Passed');
 });

it('login registered user', function() {

  loginpage.enterUsername('username');
  loginpage.enterPassword('password');
  loginpage.loginBtn().click();
  browser.driver.wait(function() {
      return browser.driver.getCurrentUrl().then
      (function(url) {
          return (/homepage/).test(url);
      });
    });
  expect(browser.getCurrentUrl()).toContain(baseurl+'/homepage');
});

Now i want to do some action on the homepage, like say click on a web element. The code of homepage is in a different spec say homepage-spec.js

describe('homepage', function() {
     beforeEach(function() {
       browser.waitForAngular();
     });

     it('click guest list', function() {
       homepage.guestlist().click();
     });

Now would i be required to write the login page code and login the user in homepage spec? Would it be possible to call the login-spec.js code in homepage-spec.js and execute it? like when i give

protractor conf.js --suite homepage-spec.js

The browser opens with the login page and logs in displaying the homepage on which the displayed web element is clicked.