Fix #17, add test case, release 0.23

.eslintrc

@@ -1,8 +1,5 @@
 {
-    "ecmaFeatures": {
-        "modules": true
-    },
-    "env": {
+   "env": {
         "node": true,
         "es6": true,
         "mocha": true

.travis.yml

@@ -1,14 +1,15 @@
 language: node_js
 node_js:
-  - "6"
+  - 8
+  - 10
+  - 12
 cache:
   - node_modules
 install:
   - npm install
-  - npm install -g eslint
   - npm install -g codecov
 script:
-  - eslint .
+  - npm run lint
   - istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec
   - codecov
 

README.md

@@ -37,7 +37,7 @@ query
     .get() // /[a-z]{3}[0-9]*$/g
 ```
 
-Required Node 6.0+ for the ES6 support, Or you can use [Babel](http://babeljs.io/) to support Node below 6.0.
+Required Node 8.0+ for the ES6 support, Or you can use [Babel](http://babeljs.io/) to support Node below 6.0.
 
 Using [Webpack](http://webpack.github.io) and [babel-loader](https://github.com/babel/babel-loader) to pack it if want to use in browsers.
 

lib/Builder.js

@@ -215,7 +215,7 @@ class Builder {
     noDigit() {
         this._validateAndAddMethodType(METHOD_TYPE_CHARACTER, METHOD_TYPES_ALLOWED_FOR_CHARACTERS)
 
-        return this.add(`[^0-9]`)
+        return this.add('[^0-9]')
     }
 
     /**
@@ -761,6 +761,9 @@ class Builder {
     _mapCaptureIndexToName(result) {
         const names = this._captureNames
 
+        // No match
+        if (!result) {return null}
+
         return Array.prototype.reduce.call(result.slice(1), (result, current, index) => {
             if (names[index]) {
                 result[names[index]] = current || ''

package.json

@@ -1,10 +1,11 @@
 {
   "name": "srl",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "Simple Regex Language",
   "main": "lib/SRL.js",
   "scripts": {
     "test": "mocha",
+    "lint": "eslint lib --fix",
     "coverage": "istanbul cover _mocha"
   },
   "repository": {
@@ -30,6 +31,7 @@
   },
   "homepage": "https://simple-regex.com",
   "devDependencies": {
+    "eslint": "^6.8.0",
     "istanbul": "^0.4.5",
     "mocha": "^3.0.2",
     "mocha-lcov-reporter": "^1.2.0"

test/issue-17-test.js

@@ -0,0 +1,16 @@
+'use strict'
+
+const assert = require('assert')
+const SRL = require('../')
+
+describe('Fix issue 17', () => {
+    it('Capture group name assignment fails', () => {
+        assert.doesNotThrow(() => {
+            const query = new SRL('capture (literally "TEST") as test')
+            const match = query.getMatch('WORD NOT HERE')
+            assert.equal(match, null)
+        }, TypeError)
+    })
+})
+
+