feature: @putout/operator-keyword: assert: isKeyword -> isLegacyKeyword

Author: coderaiser

packages/operator-keyword/README.md

@@ -53,6 +53,22 @@ isTSKeyword('implements');
 true;
 ```
 
+### `isLegacyKeyword`
+
+> A previous version of `import attributes` used the `assert` keyword instead of with. The assertion feature is now non-standard.
+>
+> (c) [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import/with)
+
+```js
+import {operator} from 'putout';
+
+const {isLegacyKeyword} = operator;
+
+isLegacyKeyword('assert');
+// returns
+true;
+```
+
 ## License
 
 MIT

packages/operator-keyword/lib/keyword.js

@@ -1,10 +1,11 @@
 const moduleDeclarations = [
     'import',
     'export',
-    'assert',
     'with',
 ];
 
+const legacyKeywords = ['assert'];
+
 const declarations = [
     'const',
     'var',
@@ -89,3 +90,7 @@ export const isTSKeyword = (name) => {
 
     return ts || tsReserved;
 };
+
+export const isLegacyKeyword = (name) => {
+    return legacyKeywords.includes(name);
+};

packages/operator-keyword/lib/keyword.spec.js

@@ -4,6 +4,7 @@ import {
     isTSKeyword,
     isDeclarationKeyword,
     isConditionKeyword,
+    isLegacyKeyword,
     isModuleDeclarationKeyword,
     isStatementKeyword,
 } from './keyword.js';
@@ -186,6 +187,13 @@ test('putout: operator: isKeyword: default', (t) => {
 test('putout: operator: isKeyword: assert', (t) => {
     const result = isKeyword('assert');
 
+    t.notOk(result);
+    t.end();
+});
+
+test('putout: operator: isLegacyKeyword: assert', (t) => {
+    const result = isLegacyKeyword('assert');
+    
     t.ok(result);
     t.end();
 });

packages/plugin-variables/lib/extract-keywords/fixture/assert.js

@@ -0,0 +1,3 @@
+const assert = require('assert');
+
+assert();

packages/plugin-variables/lib/extract-keywords/index.spec.js

@@ -78,3 +78,8 @@ test('putout: plugin-variables: extract-keywords: report: const', (t) => {
     t.report('const', `Extract 'const' from variable`);
     t.end();
 });
+
+test('putout: plugin-variables: extract-keywords: no report: assert', (t) => {
+    t.noReport('assert');
+    t.end();
+});