Enable configurable module format

Author: novemberborn

docs/06-configuration.md

@@ -240,7 +240,9 @@ export default {
 
 Node.js can only load non-standard extension as ES Modules when using [experimental loaders](https://nodejs.org/docs/latest/api/esm.html#esm_experimental_loaders). To use this you'll also have to configure AVA to `import()` your test file.
 
-This is still an experimental feature. You can opt in to it by enabling the `configurableModuleFormat` experiment. Afterwards, you'll be able to specify per-extension module formats using an object form.
+This is an experimental feature in AVA 3. You can opt in to it by enabling the `configurableModuleFormat` experiment. Afterwards, you'll be able to specify per-extension module formats using an object form.
+
+This feature is available by default in AVA 4.
 
 As with the array form, you need to explicitly list `js`, `cjs`, and `mjs` extensions. These **must** be set using the `true` value; other extensions are configurable using either `'commonjs'` or `'module'`:
 

lib/load-config.js

@@ -9,7 +9,6 @@ const pkgConf = require('pkg-conf');
 const NO_SUCH_FILE = Symbol('no ava.config.js file');
 const MISSING_DEFAULT_EXPORT = Symbol('missing default export');
 const EXPERIMENTS = new Set([
-	'configurableModuleFormat',
 	'disableNullExpectations',
 	'disableSnapshotsInHooks',
 	'nextGenConfig',

lib/module-types.js

@@ -54,7 +54,7 @@ const deriveFromArray = (extensions, defaultModuleType) => {
 	return moduleTypes;
 };
 
-module.exports = (configuredExtensions, defaultModuleType, experiments) => {
+module.exports = (configuredExtensions, defaultModuleType) => {
 	if (configuredExtensions === undefined) {
 		return {
 			cjs: 'commonjs',
@@ -67,9 +67,5 @@ module.exports = (configuredExtensions, defaultModuleType, experiments) => {
 		return deriveFromArray(configuredExtensions, defaultModuleType);
 	}
 
-	if (!experiments.configurableModuleFormat) {
-		throw new Error('You must enable the `configurableModuleFormat` experiment in order to specify module types');
-	}
-
 	return deriveFromObject(configuredExtensions, defaultModuleType);
 };

test/configurable-module-format/experimental.js

@@ -2,8 +2,5 @@ export default {
 	extensions: {
 		js: true,
 		ts: 'cjs'
-	},
-	nonSemVerExperiments: {
-		configurableModuleFormat: true
 	}
 };

test/configurable-module-format/fixtures/bad-custom-type.config.js

@@ -1,8 +1,5 @@
 export default {
 	extensions: {
 		cjs: 'module'
-	},
-	nonSemVerExperiments: {
-		configurableModuleFormat: true
 	}
 };

test/configurable-module-format/fixtures/change-cjs-loading.config.js

@@ -1,8 +1,5 @@
 export default {
 	extensions: {
 		js: 'module'
-	},
-	nonSemVerExperiments: {
-		configurableModuleFormat: true
 	}
 };

test/configurable-module-format/fixtures/change-js-loading.config.js

@@ -1,8 +1,5 @@
 export default {
 	extensions: {
 		mjs: 'commonjs'
-	},
-	nonSemVerExperiments: {
-		configurableModuleFormat: true
 	}
 };

test/configurable-module-format/fixtures/change-mjs-loading.config.js

@@ -2,8 +2,5 @@ export default {
 	extensions: {
 		js: true,
 		ts: 'commonjs'
-	},
-	nonSemVerExperiments: {
-		configurableModuleFormat: true
 	}
 };