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 inside your Karma configuration file.
If all your fixtures exist under a fixtures/base/path/
folder, then you should include
all files of interest under this base path.
module.exports = function(config){
config.set({
files: [
{
pattern: 'fixtures/base/path/**/*',
},
],
],
Finally you have to add the html2js
and karma-json-fixtures-preprocessor
karma preprocessors:
$ npm install karma-html2js-preprocessor --save-dev
$ npm install karma-json-fixtures-preprocessor --save-dev
, configure Karma to load all html and JSON fixture files via those preprocessors:
module.exports = function(config){
config.set({
preprocessors: {
'**/*.html' : ['html2js'],
'**/*.json' : ['json_fixtures']
},
and then setup the karma-json-fixtures-preprocessor
plugin:
module.exports = function(config){
config.set({
jsonFixturesPreprocessor: {
variableName: '__json__'
},
(optional) If the plugins won't get loaded by karma, you might have to declare them 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',
'karma-json-fixtures-preprocessor',
],
Implementation details
All html fixture files are pre-loaded as strings and placed inside the Karma-created window.__html__
object and all json fixtures are loaded inside
window.__json__
.
The fixture plugin is exposed in the window.fixture
object on every test run.
It loads fixture files from these objects and appends the created html inside the window.fixture.el
element that gets created on start-up. It appends loaded JSONs inside the fixture.json
array.
Usage
Lets say you have the following fixture files:
-
fixtures/base/path/test1.html
<p>p</p>
<a href='#'>
<span>link</span>
</a>
-
fixtures/base/path/json/test1.json
"{"test":true}"
You can use fixture
inside your tests to handle the fixtures:
describe('some test that needs a fixture', function(){
before(function(){
fixture.setBase('fixtures/base/path')
});
beforeEach(function(){
this.result = fixture.load('test1.html', 'test1.json');
});
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. All filenames are loaded from within the base path.
It 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.
If your fixtures exist in a base path other than the default spec/fixtures
,
you should call fixture.setBase('fixtures/base/path')
in your specs, or load them
with their full, base included, filenames prefixed with a '/'.
For example: fixture.load('/my/other/base/path/fixture1.html')
Scenarios:
html fixture
It returns an array of all the first-level nodes created by the fixture file:
html_fixture = fixture.load('test1.html');
expect(html_fixture[0].innerHTML).to.equal('<p>p</p>')
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')
expect(json_fixture).to.eql({"test":true})
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')
expect(loaded_fixtures[0][0].innerHTML).to.equal('<p>p</p>')
expect(loaded_fixtures[0][1].innerHTML).to.equal('<a href="#"><span>link</span></a>')
expect(loaded_fixtures[1]).to.eql({"test":true})
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>')
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.
-
fixture.setBase(fixtureBasePath)
It set the base path under which all forthcoming fixtures will be loaded.
This can be bypassed by loading a fixture with its full, base included, filename prefixed with a '/'.
License
The MIT License (MIT)