Allow multiple keys and values to be passed to set

red/runtime/nodes/context/index.js

@@ -268,7 +268,29 @@ function createContext(id,seed) {
             }
             context = getContextStorage(storage);
         }
-        context.set(scope, key, value, callback);
+        if (!Array.isArray(key) || !Array.isArray(value) || key.length !== value.length) {
+            context.set(scope, key, value, callback);
+        } else {
+            // If key and value are Array and each length is same, set each key-value pair.
+            var index = 0;
+            var cb = function(err, v) {
+                if (err) {
+                    if (callback) {
+                        callback(err);
+                    }
+                } else {
+                    index++;
+                    if (index === key.length) {
+                        if (callback) {
+                            callback(null);
+                        }
+                    } else {
+                        context.set(scope, key[index], value[index], cb);
+                    }
+                }
+            };
+            context.set(scope, key[index], value[index], cb);
+        }
     };
     obj.keys = function(storage, callback) {
         var context;

test/red/runtime/nodes/context/index_spec.js

@@ -615,6 +615,46 @@ describe('context', function() {
                     });
                 }).catch(function(err){ done(err); });
             });
+
+            it('should store multiple properties if key and value are arrays', function(done) {
+                Context.init({contextStorage:memoryStorage});
+                Context.load().then(function(){
+                    var context =  Context.get("1","flow");
+                    context.set(["foo1","foo2","foo3"], ["bar1","bar2","bar3"], "memory", function(err){
+                        if (err) {
+                            done(err);
+                        } else {
+                            context.get(["foo1","foo2","foo3"], "memory", function(err,foo1,foo2,foo3){
+                                if (err) {
+                                    done(err);
+                                } else {
+                                    foo1.should.be.equal("bar1");
+                                    foo2.should.be.equal("bar2");
+                                    foo3.should.be.equal("bar3");
+                                    done();
+                                }
+                            });
+                        }
+                    });
+                });
+            });
+
+            it('should return an error if an error occurs in storing multiple values', function(done) {
+                Context.init({contextStorage:contextStorage});
+                stubSet.onFirstCall().callsArgWith(3, null);
+                stubSet.onSecondCall().callsArgWith(3, "error2");
+                stubSet.onThirdCall().callsArgWith(3, null);
+                Context.load().then(function(){
+                    var context =  Context.get("1","flow");
+                    context.set(["foo1","foo2","foo3"], ["bar1","bar2","bar3"], "memory", function(err){
+                        if (err === "error2") {
+                            done();
+                        } else {
+                            done("An error occurred");
+                        }
+                    });
+                }).catch(function(err){ done(err); });
+            });
         });
 
         describe('delete context',function(){