When running tests make sure to build the grammar builder

Also add task to accept baselines

README.md

@@ -30,4 +30,7 @@ npm install         # Installs dependencies required for building
 cd ../tests
 npm install         # Installs dependencies required for testing
 npm test            # Compiles & runs tests
-```
+
+npm run diff        # Diffs the test baselines with generated one using tool set in environment variable DIFF
+npm run accept      # Accepts the test baselines
+```

tests/package.json

@@ -5,8 +5,10 @@
   "description": "",
   "main": "test.ts",
   "scripts": {
-    "pretest": "node ../build/build.js && tsc",
-    "test": "mocha --full-trace test.js"
+    "pretest": "tsc -p ../build && node ../build/build.js && tsc",
+    "test": "mocha --full-trace test.js",
+    "diff": "cross-env-shell $DIFF baselines generated",
+    "accept": "cpx generated/* baselines"
   },
   "dependencies": {
     "@types/chai": "latest",
@@ -16,5 +18,9 @@
     "mocha": "latest",
     "typescript": "latest",
     "vscode-textmate": "latest"
+  },
+  "devDependencies": {
+    "cpx": "^1.5.0",
+    "cross-env": "^5.1.1"
   }
 }

tests/test.ts

@@ -55,7 +55,6 @@ function assertBaselinesMatch(file: string, generatedText: string) {
     if (fs.existsSync(baselineFile)) {
         chai.assert.equal(generatedText, fs.readFileSync(baselineFile, 'utf8'), "Expected baselines to match: " + file);
     } else {
-        fs.writeFileSync(baselineFile, generatedText) ;
         chai.assert(false, "New generated baseline");
     }
 }