fix(e2e): create output dir if it doesn't exist (#217)

Fix #196
Fix #201

protractor.config.js

@@ -129,7 +129,26 @@ function Reporter(options) {
     fs.appendFileSync(outputFile, output);
   };
 
+  function ensureDirectoryExistence(filePath) {
+    var dirname = path.dirname(filePath);
+    if (directoryExists(dirname)) {
+      return true;
+    }
+    ensureDirectoryExistence(dirname);
+    fs.mkdirSync(dirname);
+  }
+
+  function directoryExists(path) {
+    try {
+      return fs.statSync(path).isDirectory();
+    }
+    catch (err) {
+      return false;
+    }
+  }
+
   function initOutputFile(outputFile) {
+    ensureDirectoryExistence(outputFile);
     var header = "Protractor results for: " + (new Date()).toLocaleString() + "\n\n";
     fs.writeFileSync(outputFile, header);
   }