karma-fixture

karma-fixture

A plugin for the Karma test runner that loads .html and .json fixtures.

It provides the same API as the teaspoon fixture package.

Installation

Install the plugin from npm:

$ npm install karma-fixture --save-dev

Add fixture to the frameworks array in your Karma configuration:

module.exports = function(config){
  config.set({
    frameworks: ['mocha', 'fixture'],

    // ...

You also have to register any/all fixtures in your Karma configuration:

(defaults to spec/fixtures)

module.exports = function(config){
  config.set({
    files: [
      {
        pattern: 'spec/fixtures/**/*',
      },
      // ...
    ],

    // ...
],

Finally you have to add the html2js karma preprocessor:

$ npm install karma-html2js-preprocessor --save-dev

and then configure Karma to load all html and JSON fixture files:

module.exports = function(config){
  config.set({
    preprocessors: {
      '**/*.html'   : ['html2js'],
      '**/*.json'   : ['html2js']
    },

    // ...

(optional) If the plugin won't get loaded by karma, you might have to declare it inside the plugins array in your Karma configuration (and maybe load karma-html2js-preprocessor as well):

module.exports = function(config){
  config.set({
    // ...
    plugins: [
      'karma-fixture'
      'karma-html2js-preprocessor'
      // ...
    ],

    // ...

Implementation details

All fixture files are pre-loaded as strings and placed inside the Karma-created window.__html__ array.

The fixture plugin is exposed in the window.fixture object on every test run. It loads fixture files from that array and appends the created html inside the window.fixture.el element that gets created on start-up.

Usage

Lets say you have the following fixture files:

• spec/fixtures/test1.html

  <p>p</p>
  <a href='#'>
      <span>link</span>
  </a>
  

• spec/fixtures/json/test1.json

  "{"test":true}"
  

You can use fixture inside your tests to handle the fixtures:

describe('some test that needs a fixture', function(){
  beforeEach(function(){
    this.result = fixture.load('html_fixture', 'json_fixture');
  });

  afterEach(function(){
    fixture.cleanup()
  });

  it('plays with the html fixture', function(){
    expect(fixture.el.firstChild).to.equal(this.result[0][0]);
  });

  // ...
});

API

• fixture.el

  Reference to the container element. Every html fixture loaded gets appended inside this container.

• fixture.json

  An array of all json objects imported from fixture templates.

• fixture.load(files..., append = false)

  It takes multiple filenames as arguments loads and appends them inside the fixtures container element. It returns an array with references to the newly created first level html elements. When more than one are loaded, it returns an array of the above described format, for each loaded fixture.

  It takes an optional boolean argument which defaults to false. If false, it empties the window.fixture.el container element and clears the window.fixture.json array. If true, it just appends the requested fixture to the container.

  Scenarios:

  html fixture

  It returns an array of all the first-level nodes created by the fixture file:

  html_fixture = fixture.load('test1.html');
  // then
  expect(html_fixture[0].innerHTML).to.equal('<p>p</p>')
  // and
  expect(html_fixture[1].innerHTML).to.equal('<a href="#"><span>link</span></a>')
  

  JSON fixture

  It returns a valid object by JSON.parsing the passed json fixture file. Also all JSON files loaded get appended to the window.fixture.json array:

  json_fixture = fixture.load('json/test1.json')
  // then
  expect(json_fixture).to.eql({"test":true})
  // and
  expect(fixture.json[0]).to.eql({"test":true})
  

  Multiple files

  The result will be an array containing results of each loaded template:

  loaded_fixtures = fixture.load('test1.html', 'json/test1.json')
  // then
  expect(loaded_fixtures[0][0].innerHTML).to.equal('<p>p</p>')
  // and
  expect(loaded_fixtures[0][1].innerHTML).to.equal('<a href="#"><span>link</span></a>')
  // and
  expect(loaded_fixtures[1]).to.eql({"test":true})
  // and
  expect(fixture.json[0]).to.eql({"test":true})
  

• fixture.set(html_strings, append=false)

  It takes multiple html_strings as arguments and load them. It returns the loaded result, or an array of more than one loaded results

  It takes a boolean argument with default value false. If false, it empties the window.fixture.el container element and clears the window.fixture.json array.

  result = fixture.set('<h1>test</h1>')
  // then
  expect(result[0].innerHTML).to.equal('<h1>test</h1>')
  

• fixture.cleanup()

  It empties the window.fixture.el container element and clears the window.fixture.json array.

License

The MIT License (MIT)