New: add fixer for "no-new-symbol" (#23)

lib/rules/no-new-symbol.js

@@ -0,0 +1,22 @@
+/**
+ * @fileoverview add fixer to rule no-new-symbol.
+ * @author Pig Fang<g-plane@hotmail.com>
+ */
+"use strict";
+
+const ruleComposer = require("eslint-rule-composer");
+const utils = require("../utils");
+
+const rule = utils.getFixableRule("no-new-symbol");
+
+module.exports = ruleComposer.mapReports(
+    rule,
+    problem => {
+        problem.fix = fixer => {
+            const parent = problem.node.parent;
+
+            return fixer.removeRange([parent.range[0], parent.range[0] + 4]);
+        };
+        return problem;
+    }
+);

readme.md

@@ -38,6 +38,7 @@ Name | ✔️ | 🛠 | Description
 [no-alert](https://eslint.org/docs/rules/no-alert) |  | 🛠 | disallow the use of `alert`, `confirm`, and `prompt`
 [no-console](https://eslint.org/docs/rules/no-console) | ✔️ | 🛠 | disallow the use of `console`
 [no-debugger](https://eslint.org/docs/rules/no-debugger) | ✔️ | 🛠 | disallow the use of `debugger`
+[no-new-symbol](https://eslint.org/docs/rules/no-new-symbol) |  | 🛠 | disallow `new` operators with the `Symbol` object
 [no-plusplus](https://eslint.org/docs/rules/no-plusplus) | ✔️ | 🛠 | disallow the unary operators `++` and `--`
 [no-prototype-builtins](https://eslint.org/docs/rules/no-prototype-builtins) |  | 🛠 | disallow calling some `Object.prototype` methods directly on objects
 [no-useless-concat](https://eslint.org/docs/rules/no-useless-concat) |  | 🛠 | disallow unnecessary concatenation of literals or template literals

tests/lib/rules/no-new-symbol.js

@@ -0,0 +1,32 @@
+/**
+ * @fileoverview Tests for rule no-new-symbol
+ * @author Pig Fang <g-plane@hotmail.com>
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const rule = require("../../../lib/rules/no-new-symbol");
+const RuleTester = require("eslint").RuleTester;
+
+//------------------------------------------------------------------------------
+// Tests
+//------------------------------------------------------------------------------
+
+const ruleTester = new RuleTester({ env: { es6: true } });
+const errors = [{ type: "Identifier" }];
+
+ruleTester.run("no-new-symbol", rule, {
+    valid: [
+        "Symbol('a')"
+    ],
+    invalid: [
+        {
+            code: "new Symbol('a')",
+            output: "Symbol('a')",
+            errors
+        }
+    ]
+});