Fix: no-unsupported-features has false positive (fixes #59)

Author: mysticatea

lib/rules/no-unsupported-features.js

@@ -23,6 +23,7 @@ var OPTIONS = Object.keys(features)
 var FUNC_TYPE = /^(?:Arrow)?Function(?:Declaration|Expression)$/
 var CLASS_TYPE = /^Class(?:Declaration|Expression)$/
 var DESTRUCTURING_PARENT_TYPE = /^(?:Function(?:Declaration|Expression)|ArrowFunctionExpression|AssignmentExpression|VariableDeclarator)$/
+var TOPLEVEL_SCOPE_TYPE = /^(?:global|function|module)$/
 var BINARY_NUMBER = /^0[bB]/
 var OCTAL_NUMBER = /^0[oO]/
 var UNICODE_ESC = /(\\+)u\{[0-9a-fA-F]+?\}/g
@@ -454,7 +455,7 @@ module.exports = function(context) {
 
         "FunctionDeclaration": function(node) {
             var scope = context.getScope().upper
-            if (scope.type !== "global" && scope.type !== "function") {
+            if (!TOPLEVEL_SCOPE_TYPE.test(scope.type)) {
                 report(node, "blockScopedFunctions")
             }
             if (node.generator) {

package.json

@@ -16,6 +16,7 @@
     "test:lint": "if-node-version \">=4\" eslint lib tests/lib index.js",
     "test:mocha": "nyc mocha tests/lib/**/*.js --reporter progress",
     "coverage": "nyc report --reporter=lcov && opener ./coverage/lcov-report/index.html",
+    "watch": "mocha tests/lib/**/*.js --reporter progress --watch --growl",
     "test@2": "rimraf \"node_modules/eslint-{config,plugin}-*\" && npm i eslint@2 && npm run test:mocha -- -i -g NOT_SUPPORTED_ON_2",
     "codecov": "nyc report -r lcovonly && codecov"
   },

tests/lib/rules/no-unsupported-features.js

@@ -29,6 +29,17 @@ var VERSIONS = Object.freeze([0.10, 0.12, 4, 5, 6, 7])
 function convertPattern(retv, pattern) {
     var i = 0
 
+    // If this test is on script mode, it should do this test on module mode as well.
+    if (!pattern.modules &&
+        pattern.code.indexOf("'use strict'") !== 0 &&
+        pattern.name.indexOf("non-strict") === -1
+    ) {
+        convertPattern(
+            retv,
+            Object.create(pattern, {modules: {value: true}})
+        )
+    }
+
     // Creates error messages.
     var errors = []
     for (i = 0; i < pattern.errors; ++i) {