WHAT I GOT
'use strict';

var dom = {
    // TODO: fill in library's API ...

    create: function(tag_name, attrs){

    },

    // Attributes getter / setter
    attr: function(elem, name, value){

    },

    // Append element as last child
    append: function(elem, child){

    },

    // Prepend element as first child
    prepend: function(elem, child){

    },

    // Detach element from dom
    remove: function(elem){

    }
}

                               WHAT I DID
'use strict';

var dom = {
    // TODO: fill in library's API ...

    create: function(tag_name, attrs){
        var temp = document.createElement(tag_name);
        for(var key in attrs)
            {
            temp.setAttribute(key, attrs[key]);
            }
        return temp;
    },

    // Attributes getter / setter
    attr: function(elem, name, value){
        if(!value) return elem.getAttribute(name);
        elem.setAttribute(name,value);
        return elem;
    },

    // Append element as last child
    append: function(elem, child){
        elem.appendChild(child);
    },

    // Prepend element as first child
    prepend: function(elem, child){
        elem.prepend(child);
    },

    // Detach element from dom
    remove: function(elem){
        var par = elem.parentNode;
        par.removeChild(elem);
    }
}
                           WHAT I THINK IS A TEST
'use strict';

describe('Dom library', function () {


  it('should allow to create dom elements', function () {
    var div = dom.create('div');

    expect(div instanceof window.Element).toBeTruthy();
    expect(div.tagName).toBe('DIV');
  });

  it('should allow to create dom elements with attributes', function () {
    var div = dom.create('div',{
        test:'test_value'
    });

    expect(div instanceof window.Element).toBeTruthy();
    expect(div.getAttribute('test')).toBe('test_value');
  });

  it('should allow to append elements', function () {
    var div = document.createElement('div');
    div.innerHTML = '<div id="one"></div>
    <div id="two"></div>
    <div id="three"></div>';

    var appendee = document.createElement('div');
    dom.append(div, appendee)
    expect(div.children[div.children.length - 1]).toBe(appendee);
  });

  it('should allow to prepend elements', function () {
    var div = document.createElement('div');
    div.innerHTML = '<div id="one"></div>
    <div id="two"></div>
    <div id="three"></div>';

    var prependee = document.createElement('div');
    dom.prepend(div, prependee)
    expect(div.children[0]).toBe(prependee);
  });

  it('should allow to detach elements', function () {
    var div = document.createElement('div');
    div.innerHTML = '<div id="one"></div>
    <div id="two"></div>
    <div id="three"></div>';

    var target = div.children[0];
    var detached = dom.remove(target)
    expect(target).toBe(detached);
    expect(div.children[0]).not.toBe(target);
  });

  it('should allow get element attribute', function () {
    var div = document.createElement('div');
    div.setAttribute("test","test_value");

    expect(dom.attr(div, 'test')).toEqual('test_value');
  });

  it('should allow set element attribute', function () {
    var div = document.createElement('div');
    dom.attr(div, 'test', 'test_value');

    expect(div.getAttribute('test')).toEqual('test_value');
  });