babel-plugin-ember-test-metadata
A Babel plugin for Ember apps that adds a test's file path to test metadata available through @ember/test-helpers
.
Why use this plugin
A test file's path can enable downstream consumers of test results to process, and potentially associate a specific test failure to a file path. This can assist with the analysis of test infrastructure, specifically where identifying ownership over a test file is useful or required.
This Babel plugin transforms a test so that its file path is added to @ember/test-helpers
test metadata, where other utilities can subsequently read that data.
Installation
npm install babel-plugin-ember-test-metadata --save-dev
yarn add babel-plugin-ember-test-metadata -D
Usage
This plugin needs to be configured in your ember-cli-build.js
file by adding it your babel's plugins array:
'use strict';
const EmberApp = require('ember-cli/lib/broccoli/ember-app');
module.exports = function (defaults) {
let app = new EmberApp(defaults, {
babel: {
plugins: [
[
require.resolve('babel-plugin-ember-test-metadata'),
{
enabled: !!process.env.BABEL_TEST_METADATA,
packageName: defaults.project.pkg.name,
},
],
],
},
});
return app.toTree();
};
If you're using Embroider instead of Ember CLI, you need to tell the plugin how to process the file paths:
'use strict';
const EmberApp = require('ember-cli/lib/broccoli/ember-app');
module.exports = function (defaults) {
let app = new EmberApp(defaults, {
babel: {
plugins: [
[
require.resolve('babel-plugin-ember-test-metadata'),
{
enabled: !!process.env.BABEL_TEST_METADATA,
packageName: defaults.project.pkg.name,
isUsingEmbroider: true,
},
],
],
},
});
return app.toTree();
};
Set the environment variable BABEL_TEST_METADATA=true
to enable the plugin to perform its transformations.
You can additionally pass in a projectRoot
relative path to the options to accommodate more complex project structures like workspaces.
'use strict';
const EmberApp = require('ember-cli/lib/broccoli/ember-app');
module.exports = function (defaults) {
let app = new EmberApp(defaults, {
babel: {
plugins: [
[
require.resolve('babel-plugin-ember-test-metadata'),
{
enabled: !!process.env.BABEL_TEST_METADATA,
packageName: defaults.project.pkg.name,
packageRoot: '../..',
},
],
],
},
});
return app.toTree();
};
You can also pass a custom function to normalize the test file path.
module.exports = function customNormalizedFilePath(options) {
}
'use strict';
const EmberApp = require('ember-cli/lib/broccoli/ember-app');
module.exports = function (defaults) {
let app = new EmberApp(defaults, {
babel: {
plugins: [
[
require.resolve('babel-plugin-ember-test-metadata'),
{
enabled: !!process.env.BABEL_TEST_METADATA,
packageName: defaults.project.pkg.name,
packageRoot: '../..',
getCustomNormalizedFilePath: require.resolve('path/to/your/customNormalizedFilePath/function'),
},
],
],
},
});
return app.toTree();
};