feature: @putout/test: add ability to extend with operators

Author: coderaiser

packages/test/README.md

@@ -70,6 +70,20 @@ const test = createTest(import.meta.url, {
 });
 ```
 
+And apply new [operators](https://github.com/coderaiser/supertape?tab=readme-ov-file#operators):
+
+```js
+const test = createTest(import.meta.url, {
+    extension: 'wast',
+    lint: putout,
+    plugins: [
+        ['remove-unused-variables', rmVars],
+    ],
+}, {
+    render: (operator) => (name) => operator.transform,
+});
+```
+
 ### `report(filename, message: string | string[], plugins?: PutoutPlugin[])`
 
 Check error message (or messages) of a plugin:

packages/test/lib/pre-test.js

@@ -30,6 +30,8 @@ module.exports.preTest = function preTest(test, plugin) {
         scan,
     }] = maybeEntries(plugin);
 
+    if (isArray(plugin)) {}
+    
     const options = {
         checkDuplicates: false,
     };

packages/test/lib/test.js

@@ -65,11 +65,11 @@ const parsePlugin = (plugins) => {
     return plugins;
 };
 
-function createTest(dir, maybeOptions) {
+function createTest(dir, maybeOptions, maybeExtends = {}) {
     dir = join(dir, 'fixture');
 
     const {
-        extension = [],
+        extension = '',
         lint = putout,
         ...options
     } = parseOptions(maybeOptions);
@@ -106,6 +106,7 @@ function createTest(dir, maybeOptions) {
         format: format(dir, options),
         formatMany: formatMany(dir, options),
         noFormat: noFormat(dir, options),
+        ...maybeExtends,
     });
 }
 
@@ -211,7 +212,6 @@ const transformWithOptions = currify((dir, linterOptions, options, t, name, plug
     const [input, isTS, currentExtension] = readFixture(full, extension);
 
     const rule = parseRule(options);
-    
     const rules = {
         [rule]: ['on', pluginOptions],
     };

packages/test/lib/test.mjs

@@ -4,9 +4,9 @@ import create from './test.js';
 
 export default create;
 
-export const createTest = (url, plugins) => {
+export const createTest = (url, plugins, maybeExtends) => {
     const __filename = fileURLToPath(url);
     const __dirname = dirname(__filename);
 
-    return create(__dirname, plugins);
+    return create(__dirname, plugins, maybeExtends);
 };

packages/test/test/extends.mjs

@@ -0,0 +1,15 @@
+import * as removeUnusedVariables from '@putout/plugin-remove-unused-variables';
+import {createTest} from '../lib/test.mjs';
+
+const plugins = {
+    removeUnusedVariables,
+};
+
+const test = createTest(import.meta.url, plugins, {
+    render: (operator) => () => operator.equal(1, 1),
+});
+
+test('test: extends', (t) => {
+    t.render(1, 1);
+    t.end();
+});