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https://github.com/ianwalter/bff

Your friendly test framework
https://github.com/ianwalter/bff

bff expect playwright puppeteer test test-framework test-runner testing webdriver webdriverio

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Your friendly test framework

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# @ianwalter/bff

> Your friendly test framework



[![npm page][npmImage]][npmUrl]

[![CI][ciImage]][ciUrl]



[](https://raw.githubusercontent.com/ianwalter/bff/main/screenshot.png)



## Installation



```console

yarn add @ianwalter/bff --dev

```



## CLI Usage



You can pass **all** configuration described in the next section through the CLI

using a dot syntax for nested configuration properties, e.g.

`bff --puppeteer.dumpio true`. Test files can be specified as input without a

flag, e.g. `bff tests/example.tests.js`. Array values can be specified with

multiple flag instances, e.g. `bff -t dev -t qa`.



The following top-level options are also aliased to shorter flags for

convenience:



* `--log-level, -l [level]` Specifies bff's logging level.

* `--fail-fast, -f` Specifies whether to exit when a test fails instead of

  continuing to run tests.

* `--update-snapshot, -u` Specifies whether snapshots should be created or

  updated.

* `--concurrency, -c [#]` Specifies how many tests/workers to run in parallel.

* `--tag, -t [name]` Specifies which test tags should be used to match tests.

  How it matches the tags depends on the `match` option below.

* `--match, -m [type]` Specifies whether a test needs `some` or `every`

  specified tag in order for it to be run.

* `--timeout, -T [milliseconds]` Specifies how long a test should take before

  it's marked as failed for timing out.

* `--junit, -j [file]` Specifies whether or not to write the results to a junit

  report file.

* `--verbose, -V` Logs more information for each test: test tags, relative

  file path, and timing information.



## Configuration



Configuration can be specified under the `bff` property in the current working

directory's `package.json`. The following is a snapshot of the available options

with their **default** values:



```js

{

  bff: {

    // Specifies what files to consider test files.

    // Value should be an array of file paths/globs.

    tests: [

      'tests.js',

      'tests.pptr.js',

      'tests/**/*tests.js',

      'tests/**/*pptr.js'

    ],

    // Specifies bff's logging level.

    // Possible values include: 'debug', 'info', 'warn', 'error', 'fatal'

    logLevel: 'info',

    // Specifies whether to exit when a test fails instead of continuing to run

    // tests.

    // Value should be a boolean.

    failFast: undefined,

    // Specifies whether snapshots should be created or updated.

    // Value should be a boolean (although in practice it only makes sense to

    // use this option with the CLI).

    updateSnapshot: undefined,

    // Specifies how many tests/workers to run in parallel.

    // Value should be a integer.

    concurrency: 4, // This defaults to the number of the host system's CPU

                    // cores minus one.

    // Specifies which test tags should be used to match tests. How it matches

    // the tags depends on the `match` option below.

    // Value should be an array of strings, e.g. ['dev', 'qa'].

    tag: undefined

    // Specifies whether tests have to contain every or at least one specified

    // tag in order to be matched and run.

    // Value should be an array test method ('some' or 'every').

    match: 'some',

    // Specifies how long a test should take before it is marked as failed for

    // timing out.

    // Value should be a length of time in milliseconds (integer).

    timeout: 60000,

    // Specifies whether or not to write the results to a junit report file.

    // Value should either be a boolean or a string specifying the relative path

    // of the report file.

    junit: undefined,



    // Configuration specified under this property will be passed directly to

    // Puppeteer's launch method. See Puppeteer's documentation for information

    // on those options:

    // https://pptr.dev/#?product=Puppeteer&show=api-puppeteerlaunchoptions

    puppeteer: {

      // Treat all test files as puppeteer test files regardless of whether the

      // test file contains the .pptr.js file extension or not.

      // Value should be a boolean.

      all: undefined

    }

  }

}

```



## Writing tests



Declare a test by calling the test function with a name and a function:



```js

import { test } from '@ianwalter/bff'

import someFunctionality from './someFunctionality'



test('some functionality', ({ expect }) => {

  expect(someFunctionality()).toBeTruthy()

})

```



If the test name/description is really long, you can also pass the test function

in a second call:



```js

test(`

  some functionality when some environment variable is set, the user has some

  localStorage value, and some query parameter has a certain value

`)(({ expect }) => {

  expect(scenario).toMatchSnapshot()

})

```



You can skip individual tests by adding the `.skip` modifier:



```js

test.skip('something', ({ expect }) => {

  expect(something).toBe(somethingElse)

})

```



You can also have only designated tests in a test file run with the `.only`

modifier:



```js

test.only('focus', ({ expect }) => {

  expect({}).toEqual({})

})

```



If you have flaky tests and you don't necessarily want them to fail a test run

but would like to be warned when they fail, you can use the `.warn` modifier:



```js

test.warn('Payfail checkout', asnyc ({ expect }) => {

  expect(await payfailCheckout()).toEqual({ success: true })

})

```



## Related



* [`@ianwalter/bff-webdriver`][bffWebdriverUrl] - A bff plugin to enable

  WebDriver-based testing

* [`@ianwalter/bff-puppeteer`][bffPuppeteerUrl] - A bff plugin to enable

  Puppeteer-based testing



## License



Hippocratic License - See [LICENSE][licenseUrl]



 



Created by [Ian Walter](https://iankwalter.com)



[npmImage]: https://img.shields.io/npm/v/@ianwalter/bff.svg

[npmUrl]: https://www.npmjs.com/package/@ianwalter/bff

[ciImage]: https://github.com/ianwalter/bff/workflows/CI/badge.svg

[ciUrl]: https://github.com/ianwalter/bff/actions

[bffWebdriverUrl]: https://github.com/ianwalter/bff-webdriver

[bffPuppeteerUrl]: https://github.com/ianwalter/bff-puppeteer

[licenseUrl]: https://github.com/ianwalter/bff/blob/main/packages/bff/LICENSE