Display warning for gas price

lib/tests/test.js

@@ -188,6 +188,7 @@ class Test {
           }
           return self.connectToIpcNode(cb);
         }
+        self.showNodeHttpWarning();
         cb();
       }
     ], callback);
@@ -200,10 +201,17 @@ class Test {
         return cb();
       }
       this.options.node = node;
+      this.showNodeHttpWarning();
       cb();
     });
   }
 
+  showNodeHttpWarning() {
+    if (this.options.node.startsWith('http')) {
+      this.engine.logger.warn("You are using http to connect to the node, as a result the gas details won't be correct");
+    }
+  }
+
   onReady(callback) {
     const self = this;
     if (this.ready) {