Commting latest build and fix for tests

Author: obenjiro

dist/speg.js

@@ -29,13 +29,14 @@
   },
   "homepage": "https://github.com/SimplePEG/JavaScript#readme",
   "devDependencies": {
-    "chai": "4.1.0",
+    "chai": "^4.1.0",
     "coveralls": "^2.11.9",
-    "eslint": "4.4.1",
+    "eslint": "^4.4.1",
     "istanbul": "^0.4.4",
     "mocha": "^3.5.0",
     "mocha-lcov-reporter": "^1.2.0",
     "recursive-readdir-sync": "^1.0.6",
-    "webpack": "^3.5.2"
+    "webpack": "^3.5.2",
+    "mockery": "^2.1.0"    
   }
 }

package.json

@@ -1,10 +1,21 @@
-var SPEG = require('./../src/speg').SPEG;
+var simplepeg = require('./../src/speg')
+var SPEG = simplepeg.SPEG;
 var fs = require('fs');
 var path = require('path');
+var mockery = require('mockery');
 var recursiveReadSync = require('recursive-readdir-sync');
 var valid_files = recursiveReadSync('./test/speg_fixtures');
 
 describe('speg module - fixtures - ', function() {
+    beforeEach(function(){
+        mockery.enable({ warnOnReplace: false, useCleanCache: true });
+        mockery.registerAllowable('./../parser');
+        mockery.registerMock('simplepeg', simplepeg);
+    });
+    afterEach(function() {
+        mockery.deregisterMock('simplepeg');
+        mockery.disable();
+    });
     valid_files = valid_files.filter(function(filename) {
         return /\.peg$/.test(filename);
     })
@@ -26,4 +37,4 @@ describe('speg module - fixtures - ', function() {
             }
         }(valid_files[i])));
     }
-});
+});