node: add getNetworkName method

lib/node.js

@@ -248,6 +248,14 @@ Node.prototype.start = function(callback) {
   );
 };
 
+Node.prototype.getNetworkName = function() {
+  var network = this.network.name;
+  if (this.network.regtestEnabled) {
+    network = 'regtest';
+  }
+  return network;
+};
+
 /**
  * Will stop all running services in the reverse order that they
  * were initially started.

lib/services/bitcoind.js

@@ -1301,10 +1301,7 @@ Bitcoin.prototype.getInfo = function(callback) {
       return callback(self._wrapRPCError(err));
     }
     var result = response.result;
-    result.network = self.node.network.name;
-    if (self.node.network.regtestEnabled) {
-      result.network = 'regtest';
-    }
+    result.network = self.node.getNetworkName();
     callback(null, result);
   });
 };

regtest/bitcoind.js

@@ -49,7 +49,10 @@ describe('Bitcoind Functionality', function() {
           exec: path.resolve(__dirname, '../bin/bitcoind')
         },
         node: {
-          network: regtestNetwork
+          network: regtestNetwork,
+          getNetworkName: function() {
+            return 'regtest';
+          }
         }
       });