15 changed files with 361 additions and 21 deletions
@ -1 +1,188 @@ |
|||||
# heading |
# Neutrino Karma Preset [![NPM version][npm-image]][npm-url] |
||||
|
|
||||
|
`neutrino-preset-karma` is a Neutrino preset that supports testing web applications using the Karma test runner. |
||||
|
|
||||
|
## Features |
||||
|
|
||||
|
- Zero upfront configuration necessary to start testing on real browsers with Karma, Mocha, and Chrome |
||||
|
- Babel compilation that compiles your tests using the same Babel options used by your source code |
||||
|
- Source watching for re-running of tests on change |
||||
|
- Out-of-the-box support for running in CI |
||||
|
- Easily extensible to customize your testing as needed |
||||
|
|
||||
|
## Requirements |
||||
|
|
||||
|
- Node.js v6.9+ |
||||
|
- Yarn or npm client |
||||
|
- Neutrino v4, Neutrino build preset |
||||
|
|
||||
|
## Installation |
||||
|
|
||||
|
`neutrino-preset-karma` can be installed via the Yarn or npm clients. Inside your project, make sure |
||||
|
`neutrino` and `neutrino-preset-karma` are development dependencies. You will also be using |
||||
|
another Neutrino preset for building your application source code. |
||||
|
|
||||
|
#### Yarn |
||||
|
|
||||
|
```bash |
||||
|
❯ yarn add --dev neutrino-preset-karma |
||||
|
``` |
||||
|
|
||||
|
#### npm |
||||
|
|
||||
|
```bash |
||||
|
❯ npm install --save-dev neutrino-preset-karma |
||||
|
``` |
||||
|
|
||||
|
## Project Layout |
||||
|
|
||||
|
`neutrino-preset-karma` follows the standard [project layout](/project-layout.md) specified by Neutrino. This |
||||
|
means that by default all project test code should live in a directory named `test` in the root of the |
||||
|
project. Test files end in `_test.js` by default. |
||||
|
|
||||
|
## Quickstart |
||||
|
|
||||
|
After adding the Karma preset to your Neutrino-built project, add a new directory named `test` in the root of the |
||||
|
project, with a single JS file named `simple_test.js` in it. |
||||
|
|
||||
|
```bash |
||||
|
❯ mkdir test && touch test/simple_test.js |
||||
|
``` |
||||
|
|
||||
|
Edit your `test/simple_test.js` file with the following: |
||||
|
|
||||
|
```js |
||||
|
import assert from 'assert'; |
||||
|
|
||||
|
describe('simple', () => { |
||||
|
it('should be sane', () => { |
||||
|
assert.equal(true, !false); |
||||
|
}); |
||||
|
}); |
||||
|
``` |
||||
|
|
||||
|
Now edit your project's package.json to add commands for testing your application. In this example, |
||||
|
let's pretend this is a React project: |
||||
|
|
||||
|
```json |
||||
|
{ |
||||
|
"scripts": { |
||||
|
"test": "neutrino test --presets neutrino-preset-node neutrino-preset-karma" |
||||
|
} |
||||
|
} |
||||
|
``` |
||||
|
|
||||
|
Run the tests, and view the results in your console: |
||||
|
|
||||
|
#### Yarn |
||||
|
|
||||
|
```bash |
||||
|
❯ yarn test |
||||
|
|
||||
|
START: |
||||
|
16 02 2017 10:36:34.713:INFO [karma]: Karma v1.4.1 server started at http://0.0.0.0:9876/ |
||||
|
16 02 2017 10:36:34.715:INFO [launcher]: Launching browser Chrome with unlimited concurrency |
||||
|
16 02 2017 10:36:34.731:INFO [launcher]: Starting browser Chrome |
||||
|
16 02 2017 10:36:35.655:INFO [Chrome 56.0.2924 (Mac OS X 10.12.3)]: Connected on socket MkTbqJLpAAa2HFaeAAAA with id 21326158 |
||||
|
simple |
||||
|
✔ should be sane |
||||
|
|
||||
|
Finished in 0.003 secs / 0 secs @ 10:36:35 GMT-0600 (CST) |
||||
|
|
||||
|
SUMMARY: |
||||
|
✔ 1 test completed |
||||
|
✨ Done in 7.54s. |
||||
|
``` |
||||
|
|
||||
|
#### npm |
||||
|
|
||||
|
```bash |
||||
|
❯ npm test |
||||
|
|
||||
|
START: |
||||
|
16 02 2017 10:38:12.865:INFO [karma]: Karma v1.4.1 server started at http://0.0.0.0:9876/ |
||||
|
16 02 2017 10:38:12.867:INFO [launcher]: Launching browser Chrome with unlimited concurrency |
||||
|
16 02 2017 10:38:12.879:INFO [launcher]: Starting browser Chrome |
||||
|
16 02 2017 10:38:13.688:INFO [Chrome 56.0.2924 (Mac OS X 10.12.3)]: Connected on socket svRGoxU0etKTKQWhAAAA with id 68456725 |
||||
|
simple |
||||
|
✔ should be sane |
||||
|
|
||||
|
Finished in 0.006 secs / 0 secs @ 10:38:13 GMT-0600 (CST) |
||||
|
|
||||
|
SUMMARY: |
||||
|
✔ 1 test completed |
||||
|
``` |
||||
|
|
||||
|
To run tests against files from your source code, simply import them: |
||||
|
|
||||
|
```js |
||||
|
import thingToTest from '../src/thing'; |
||||
|
``` |
||||
|
|
||||
|
For more details on specific Karma usage, please refer to their |
||||
|
[documentation](https://karma-runner.github.io/1.0/index.html). |
||||
|
|
||||
|
## Executing single tests |
||||
|
|
||||
|
By default this preset will execute every test file located in your test directory ending in the appropriate file |
||||
|
extension. |
||||
|
Use the command line [`files` parameters](/cli/README.md#neutrino-test) to execute individual tests. |
||||
|
|
||||
|
## Watching for changes |
||||
|
|
||||
|
`neutrino-preset-karma` can watch for changes on your source directory and subsequently re-run tests. Simply use the |
||||
|
`--watch` flag with your `neutrino test` command. |
||||
|
|
||||
|
## Using from CI |
||||
|
|
||||
|
`neutrino-preset-karma` needs no additional configuration to run your tests in CI infrastructure, but you will still |
||||
|
need to ensure your CI can actually run the tests. This usually means having a display emulator and access to the |
||||
|
browsers you are testing against. |
||||
|
|
||||
|
To do this in Travis-CI, you will need to add the following to your `.travis.yml` file for Chrome tests: |
||||
|
|
||||
|
```yaml |
||||
|
before_install: |
||||
|
- export CHROME_BIN=chromium-browser |
||||
|
- export DISPLAY=:99.0 |
||||
|
- sh -e /etc/init.d/xvfb start |
||||
|
``` |
||||
|
|
||||
|
## Customizing |
||||
|
|
||||
|
To override the test configuration, start with the documentation on [customization](/customization/README.md). |
||||
|
`neutrino-preset-karma` creates some conventions to make overriding the configuration easier once you are ready to make |
||||
|
changes. |
||||
|
|
||||
|
### Simple customization |
||||
|
|
||||
|
It is not currently possible to override `neutrino-preset-karma` settings from the package.json using simple |
||||
|
customization. Please use the advanced configuration for changes. |
||||
|
|
||||
|
### Advanced configuration |
||||
|
|
||||
|
By following the [customization guide](/customization/advanced.md) you can override and augment testing by creating a |
||||
|
JS module which overrides the config. |
||||
|
|
||||
|
You can also modify Karma settings by overriding with any options Karma accepts. In a standalone Karma project this is |
||||
|
typically done in a `karma.conf.js` file, but `neutrino-preset-karma` unifies advanced configuration through a preset |
||||
|
override module. When needing to make changes to Karma-specific settings, this is stored in the `neutrino.custom.karma` |
||||
|
object, and takes the same configuration options as outlined in the |
||||
|
[Karma documentation](https://karma-runner.github.io/1.0/config/configuration-file.html). |
||||
|
|
||||
|
_Example: Change the duration Karma waits for a browser to reconnect (in ms)._ |
||||
|
|
||||
|
```js |
||||
|
module.exports = neutrino => { |
||||
|
neutrino.custom.karma.browserDisconnectTimeout = 5000; |
||||
|
}; |
||||
|
``` |
||||
|
|
||||
|
## Contributing |
||||
|
|
||||
|
This preset is part of the [neutrino-dev](https://github.com/mozilla-neutrino/neutrino-dev) repository, a monorepo |
||||
|
containing all resources for developing Neutrino and its core presets. Follow the |
||||
|
[contributing guide](/contributing/README.md) for details. |
||||
|
|
||||
|
[npm-image]: https://badge.fury.io/js/neutrino-preset-karma.svg |
||||
|
[npm-url]: https://npmjs.org/package/neutrino-preset-karma |
||||
|
Loading…
Reference in new issue