feat(fixer): add fixer to no-new-statics rule (#133)

Author: macklinu

README.md

@@ -88,7 +88,7 @@ or start with the recommended rule set
 | [`no-promise-in-callback`][no-promise-in-callback]       | Avoid using promises inside of callbacks                                         | :warning:   |          |
 | [`no-callback-in-promise`][no-callback-in-promise]       | Avoid calling `cb()` inside of a `then()` (use [nodeify][] instead)              | :warning:   |          |
 | [`avoid-new`][avoid-new]                                 | Avoid creating `new` promises outside of utility libs (use [pify][] instead)     |             |          |
-| [`no-new-statics`][no-new-statics]                       | Avoid calling `new` on a Promise static method                                   | :bangbang:  |          |
+| [`no-new-statics`][no-new-statics]                       | Avoid calling `new` on a Promise static method                                   | :bangbang:  | :wrench: |
 | [`no-return-in-finally`][no-return-in-finally]           | Disallow return statements in `finally()`                                        | :warning:   |          |
 | [`valid-params`][valid-params]                           | Ensures the proper number of arguments are passed to Promise functions           | :warning:   |          |
 | [`prefer-await-to-then`][prefer-await-to-then]           | Prefer `await` to `then()` for reading Promise values                            | :seven:     |          |

__tests__/no-new-statics.js

@@ -18,19 +18,38 @@ ruleTester.run('no-new-statics', rule, {
   invalid: [
     {
       code: 'new Promise.resolve()',
+      output: 'Promise.resolve()',
       errors: [{ message: "Avoid calling 'new' on 'Promise.resolve()'" }]
     },
     {
       code: 'new Promise.reject()',
+      output: 'Promise.reject()',
       errors: [{ message: "Avoid calling 'new' on 'Promise.reject()'" }]
     },
     {
       code: 'new Promise.all()',
+      output: 'Promise.all()',
       errors: [{ message: "Avoid calling 'new' on 'Promise.all()'" }]
     },
     {
       code: 'new Promise.race()',
+      output: 'Promise.race()',
       errors: [{ message: "Avoid calling 'new' on 'Promise.race()'" }]
+    },
+    {
+      code: [
+        'function foo() {',
+        '  var a = getA()',
+        '  return new Promise.resolve(a)',
+        '}'
+      ].join('\n'),
+      output: [
+        'function foo() {',
+        '  var a = getA()',
+        '  return Promise.resolve(a)',
+        '}'
+      ].join('\n'),
+      errors: [{ message: "Avoid calling 'new' on 'Promise.resolve()'" }]
     }
   ]
 })

rules/no-new-statics.js

@@ -7,7 +7,8 @@ module.exports = {
   meta: {
     docs: {
       url: getDocsUrl('no-new-statics')
-    }
+    },
+    fixable: 'code'
   },
   create(context) {
     return {
@@ -20,7 +21,13 @@ module.exports = {
           context.report({
             node,
             message: "Avoid calling 'new' on 'Promise.{{ name }}()'",
-            data: { name: node.callee.property.name }
+            data: { name: node.callee.property.name },
+            fix(fixer) {
+              return fixer.replaceTextRange(
+                [node.start, node.start + 'new '.length],
+                ''
+              )
+            }
           })
         }
       }