Merge pull request #1780 from natcl/json-schema

Add JSON schema validation to JSON node

nodes/core/io/32-udp.js

@@ -63,7 +63,7 @@ module.exports = function(RED) {
             udpInputPortsInUse[this.port] = server;
         }
         else {
-            node.warn(RED._("udp.errors.alreadyused",{port:node.port}));
+            node.log(RED._("udp.errors.alreadyused",{port:node.port}));
             server = udpInputPortsInUse[this.port];  // re-use existing
         }
 
@@ -172,8 +172,7 @@ module.exports = function(RED) {
         if (process.version.indexOf("v0.10") === 0) { opts = node.ipv; }
 
         var sock;
-        var p = this.port;
+        var p = this.outport || this.port || "0";
-        if (node.multicast != "false") { p = this.outport||"0"; }
         if (udpInputPortsInUse[p]) {
             sock = udpInputPortsInUse[p];
             node.log(RED._("udp.status.re-use",{outport:node.outport,host:node.addr,port:node.port}));

nodes/core/locales/en-US/messages.json

@@ -697,7 +697,9 @@
         "errors": {
             "dropped-object": "Ignored non-object payload",
             "dropped": "Ignored unsupported payload type",
-            "dropped-error": "Failed to convert payload"
+            "dropped-error": "Failed to convert payload",
+            "schema-error": "JSON Schema error",
+            "schema-error-compile": "JSON Schema error: failed to compile schema"
         },
         "label": {
             "o2j": "Object to JSON options",

nodes/core/logic/17-split.js

@@ -686,10 +686,13 @@ module.exports = function(RED) {
                 } else {
                     if (!isNaN(propertyIndex)) {
                         group.payload[propertyIndex] = property;
+                        group.currentCount++;
                     } else {
-                        group.payload.push(property);
+                        if (property !== undefined) {
+                            group.payload.push(property);
+                            group.currentCount++;
+                        }
                     }
-                    group.currentCount++;
                 }
                 group.msg = Object.assign(group.msg, msg);
                 var tcnt = group.targetCount;

nodes/core/parsers/70-JSON.html

@@ -31,6 +31,8 @@
     <dl class="message-properties">
         <dt>payload<span class="property-type">object | string</span></dt>
         <dd>A JavaScript object or JSON string.</dd>
+        <dt>schema<span class="property-type">object</span></dt>
+        <dd>An optional JSON Schema object to validate the payload against.</dd>
     </dl>
     <h3>Outputs</h3>
     <dl class="message-properties">
@@ -41,6 +43,9 @@
                 <li>If the input is a JavaScript object it creates a JSON string. The string can optionally be well-formatted.</li>
             </ul>
         </dd>
+        <dt>schemaError<span class="property-type">array</span></dt>
+        <dd>If JSON schema validation fails, the catch node will have a <code>schemaError</code> property
+            containing an array of errors.</dd>
     </dl>
     <h3>Details</h3>
     <p>By default, the node operates on <code>msg.payload</code>, but can be configured
@@ -53,6 +58,8 @@
        receives a String, no further checks will be made of the property. It will
        not check the String is valid JSON nor will it reformat it if the format option
        is selected.</p>
+    <p>For more details about JSON Schema you can consult the specification
+    <a href="http://json-schema.org/latest/json-schema-validation.html">here</a>.</p>
 </script>
 
 <script type="text/javascript">

nodes/core/parsers/70-JSON.js

@@ -16,21 +16,52 @@
 
 module.exports = function(RED) {
     "use strict";
+    const Ajv = require('ajv');
+    const ajv = new Ajv({allErrors: true, schemaId: 'auto'});
+    ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-04.json'));
 
     function JSONNode(n) {
         RED.nodes.createNode(this,n);
         this.indent = n.pretty ? 4 : 0;
         this.action = n.action||"";
         this.property = n.property||"payload";
+        this.schema = null;
+        this.compiledSchema = null;
+
         var node = this;
         this.on("input", function(msg) {
+            var validate = false;
+            if (msg.schema) {
+                // If input schema is different, re-compile it
+                if (JSON.stringify(this.schema) != JSON.stringify(msg.schema)) {
+                    try {
+                        this.compiledSchema = ajv.compile(msg.schema);
+                        this.schema = msg.schema;
+                    } catch(e) {
+                        this.schema = null;
+                        this.compiledSchema = null;
+                        node.error(RED._("json.errors.schema-error-compile"), msg);
+                        return;
+                    }
+                }
+                validate = true;
+            }
             var value = RED.util.getMessageProperty(msg,node.property);
             if (value !== undefined) {
                 if (typeof value === "string") {
                     if (node.action === "" || node.action === "obj") {
                         try {
                             RED.util.setMessageProperty(msg,node.property,JSON.parse(value));
-                            node.send(msg);
+                            if (validate) {
+                                if (this.compiledSchema(msg[node.property])) {
+                                    node.send(msg);
+                                } else {
+                                    msg.schemaError = this.compiledSchema.errors;
+                                    node.error(`${RED._("json.errors.schema-error")}: ${ajv.errorsText(this.compiledSchema.errors)}`, msg);
+                                }
+                            } else  {
+                                node.send(msg);
+                            }
                         }
                         catch(e) { node.error(e.message,msg); }
                     } else {
@@ -41,8 +72,19 @@ module.exports = function(RED) {
                     if (node.action === "" || node.action === "str") {
                         if (!Buffer.isBuffer(value)) {
                             try {
-                                RED.util.setMessageProperty(msg,node.property,JSON.stringify(value,null,node.indent));
+                                if (validate) {
-                                node.send(msg);
+                                    if (this.compiledSchema(value)) {
+                                        RED.util.setMessageProperty(msg,node.property,JSON.stringify(value,null,node.indent));
+                                        node.send(msg);
+                                    } else {
+                                        msg.schemaError = this.compiledSchema.errors;
+                                        node.error(`${RED._("json.errors.schema-error")}: ${ajv.errorsText(this.compiledSchema.errors)}`, msg);
+                                    }
+                                } else {
+                                    RED.util.setMessageProperty(msg,node.property,JSON.stringify(value,null,node.indent));
+                                    node.send(msg);
+                                }
+
                             }
                             catch(e) { node.error(RED._("json.errors.dropped-error")); }
                         }

package.json

@@ -33,6 +33,7 @@
     "flow"
   ],
   "dependencies": {
+    "ajv": "6.5.1",
     "basic-auth": "2.0.0",
     "bcryptjs": "2.4.3",
     "body-parser": "1.18.3",

test/nodes/core/logic/17-split_spec.js

@@ -20,6 +20,8 @@ var joinNode = require("../../../../nodes/core/logic/17-split.js");
 var helper = require("node-red-node-test-helper");
 var RED = require("../../../../red/red.js");
 
+var TimeoutForErrorCase = 20; 
+
 describe('SPLIT node', function() {
 
     before(function(done) {
@@ -264,6 +266,126 @@ describe('SPLIT node', function() {
         });
     });
 
+    it('should handle invalid spltType (not an array)', function (done) {
+        var flow = [{ id: "sn1", type: "split", splt: "1", spltType: "bin", wires: [["sn2"]] },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            setTimeout(function () {
+                done();
+            }, TimeoutForErrorCase);
+            sn2.on("input", function (msg) {
+                done(new Error("This path does not go through."));
+            });
+            sn1.receive({ payload: "123" });
+        });
+    });
+
+    it('should handle invalid splt length', function (done) {
+        var flow = [{ id: "sn1", type: "split", splt: 0, spltType: "len", wires: [["sn2"]] },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            setTimeout(function () {
+                done();
+            }, TimeoutForErrorCase);
+            sn2.on("input", function (msg) {
+                done(new Error("This path does not go through."));
+            });
+            sn1.receive({ payload: "123" });
+        });
+    });
+
+    it('should handle invalid array splt length', function (done) {
+        var flow = [{ id: "sn1", type: "split", arraySplt: 0, arraySpltType: "len", wires: [["sn2"]] },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            setTimeout(function () {
+                done();
+            }, TimeoutForErrorCase);
+            sn2.on("input", function (msg) {
+                done(new Error("This path does not go through."));
+            });
+            sn1.receive({ payload: "123" });
+        });
+    });
+
+    it('should ceil count value when msg.payload type is string', function (done) {
+        var flow = [{ id: "sn1", type: "split", splt: "2", spltType: "len", wires: [["sn2"]] },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            sn2.on("input", function (msg) {
+                msg.should.have.property("parts");
+                msg.parts.should.have.property("count", 2);
+                msg.parts.should.have.property("index");
+                if (msg.parts.index === 0) { msg.payload.length.should.equal(2); }
+                if (msg.parts.index === 1) { msg.payload.length.should.equal(1); done(); }
+            });
+            sn1.receive({ payload: "123" });
+        });
+    });
+
+    it('should handle spltBufferString value of undefined', function (done) {
+        var flow = [{ id: "sn1", type: "split", wires: [["sn2"]], splt: "[52]", spltType: "bin" },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            sn2.on("input", function (msg) {
+                try {
+                    msg.should.have.property("parts");
+                    msg.parts.should.have.property("index");
+                    if (msg.parts.index === 0) { msg.payload.toString().should.equal("123"); done(); }
+                } catch (err) {
+                    done(err);
+                }
+            });
+            sn1.receive({ payload: "123" });
+        });
+    });
+
+    it('should ceil count value when msg.payload type is Buffer', function (done) {
+        var flow = [{ id: "sn1", type: "split", splt: "2", spltType: "len", wires: [["sn2"]] },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            sn2.on("input", function (msg) {
+                msg.should.have.property("parts");
+                msg.parts.should.have.property("count", 2);
+                msg.parts.should.have.property("index");
+                if (msg.parts.index === 0) { msg.payload.length.should.equal(2); }
+                if (msg.parts.index === 1) { msg.payload.length.should.equal(1); done(); }
+            });
+            var b = new Buffer.from("123");
+            sn1.receive({ payload: b });
+        });
+    });
+
+    it('should set msg.parts.ch when node.spltType is str', function (done) {
+        var flow = [{ id: "sn1", type: "split", splt: "2", spltType: "str", stream: false, wires: [["sn2"]] },
+                    { id: "sn2", type: "helper" }];
+        helper.load(splitNode, flow, function () {
+            var sn1 = helper.getNode("sn1");
+            var sn2 = helper.getNode("sn2");
+            sn2.on("input", function (msg) {
+                msg.should.have.property("parts");
+                msg.parts.should.have.property("count", 2);
+                msg.parts.should.have.property("index");
+                if (msg.parts.index === 0) { msg.payload.length.should.equal(2); }
+                if (msg.parts.index === 1) { msg.payload.length.should.equal(1); done(); }
+            });
+            var b = new Buffer.from("123");
+            sn1.receive({ payload: b });
+        });
+    });
+
 });
 
 describe('JOIN node', function() {
@@ -696,6 +818,57 @@ describe('JOIN node', function() {
         });
     });
 
+        it('should manually join things into an array, send when told complete', function(done) {
+            var flow = [{id:"n1", type:"join", wires:[["n2"]], timeout:1, mode:"custom", build:"array"},
+                        {id:"n2", type:"helper"}];
+            helper.load(joinNode, flow, function() {
+                var n1 = helper.getNode("n1");
+                var n2 = helper.getNode("n2");
+                n2.on("input", function(msg) {
+                    try {
+                        msg.should.have.property("payload");
+                        msg.payload.should.be.an.Array();
+                        msg.payload.length.should.equal(3);
+                        msg.payload[0].should.equal(1);
+                        msg.payload[1].should.equal(2);
+                        msg.payload[2].should.equal(3);
+                        done();
+                    }
+                    catch(e) { done(e); }
+                });
+                n1.receive({payload:1, topic:"A"});
+                n1.receive({payload:2, topic:"B"});
+                n1.receive({payload:3, topic:"C"});
+                n1.receive({complete:true});
+            });
+        });
+
+
+        it('should manually join things into an object, send when told complete', function(done) {
+            var flow = [{id:"n1", type:"join", wires:[["n2"]], timeout:1, mode:"custom", build:"object"},
+                        {id:"n2", type:"helper"}];
+            helper.load(joinNode, flow, function() {
+                var n1 = helper.getNode("n1");
+                var n2 = helper.getNode("n2");
+                n2.on("input", function(msg) {
+                    try {
+                        msg.should.have.property("payload");
+                        msg.payload.should.be.an.Object();
+                        Object.keys(msg.payload).length.should.equal(3);
+                        msg.payload.A.should.equal(1);
+                        msg.payload.B.should.equal(2);
+                        msg.payload.C.should.equal(3);
+                        done();
+                    }
+                    catch(e) { done(e); }
+                });
+                n1.receive({payload:1, topic:"A"});
+                n1.receive({payload:2, topic:"B"});
+                n1.receive({payload:3, topic:"C"});
+                n1.receive({complete:true});
+            });
+        });
+
     it('should join split strings back into a word', function(done) {
         var flow = [{id:"n1", type:"join", mode:"auto", wires:[["n2"]]},
                     {id:"n2", type:"helper"}];
@@ -739,7 +912,7 @@ describe('JOIN node', function() {
         });
     });
 
-    it('should redece messages', function(done) {
+    it('should reduce messages', function(done) {
         var flow = [{id:"n1", type:"join", mode:"reduce",
                      reduceRight:false,
                      reduceExp:"$A+payload",
@@ -767,7 +940,7 @@ describe('JOIN node', function() {
         });
     });
 
-    it('should redece messages using $I', function(done) {
+    it('should reduce messages using $I', function(done) {
         var flow = [{id:"n1", type:"join", mode:"reduce",
                      reduceRight:false,
                      reduceExp:"$A+$I",
@@ -795,7 +968,7 @@ describe('JOIN node', function() {
         });
     });
 
-    it('should redece messages with fixup', function(done) {
+    it('should reduce messages with fixup', function(done) {
         var flow = [{id:"n1", type:"join", mode:"reduce",
                      reduceRight:false,
                      reduceExp:"$A+payload",
@@ -824,7 +997,7 @@ describe('JOIN node', function() {
         });
     });
 
-    it('should redece messages (left)', function(done) {
+    it('should reduce messages (left)', function(done) {
         var flow = [{id:"n1", type:"join", mode:"reduce",
                      reduceRight:false,
                      reduceExp:"'(' & $A & '+' & payload & ')'",
@@ -853,7 +1026,7 @@ describe('JOIN node', function() {
         });
     });
 
-    it('should redece messages (right)', function(done) {
+    it('should reduce messages (right)', function(done) {
         var flow = [{id:"n1", type:"join", mode:"reduce",
                      reduceRight:true,
                      reduceExp:"'(' & $A & '+' & payload & ')'",
@@ -882,7 +1055,7 @@ describe('JOIN node', function() {
         });
     });
 
-    it('should redece messages with array result', function(done) {
+    it('should reduce messages with array result', function(done) {
         var flow = [{id:"n1", type:"join", mode:"reduce",
                      reduceRight:false,
                      reduceExp:"$append($A,[payload])",
@@ -942,7 +1115,7 @@ describe('JOIN node', function() {
                 evt.should.have.property('type', "join");
                 evt.should.have.property('msg', "join.too-many");
                 done();
-            }, 150);
+            }, TimeoutForErrorCase);
             n1.receive({payload:3, parts:{index:2, count:4, id:222}});
             n1.receive({payload:2, parts:{index:1, count:4, id:222}});
             n1.receive({payload:4, parts:{index:3, count:4, id:222}});
@@ -950,4 +1123,109 @@ describe('JOIN node', function() {
         });
     });
 
+    it('should handle invalid JSON expression"', function (done) {
+        var flow = [{
+            id: "n1", type: "join", mode: "reduce",
+            reduceRight: false,
+            reduceExp: "invalid expr",
+            reduceInit: "0",
+            reduceInitType: "num",
+            reduceFixup: undefined,
+            wires: [["n2"]]
+        },
+        { id: "n2", type: "helper" }];
+        helper.load(joinNode, flow, function () {
+            var n1 = helper.getNode("n1");
+            var n2 = helper.getNode("n2");
+            setTimeout(function () {
+                done();
+            }, TimeoutForErrorCase);
+            n2.on("input", function (msg) {
+                done(new Error("This path does not go through."));
+            });
+            n1.receive({ payload: "A", parts: { id: 1, type: "string", ch: ",", index: 0, count: 1 } });
+        });
+    });
+
+    it('should concat payload when group.type is array', function (done) {
+        var flow = [{ id: "n1", type: "join", wires: [["n2"]], build: "array", mode: "auto" },
+                    { id: "n2", type: "helper" }];
+        helper.load(joinNode, flow, function () {
+            var n1 = helper.getNode("n1");
+            var n2 = helper.getNode("n2");
+            n2.on("input", function (msg) {
+                try {
+                    msg.should.have.property("payload");
+                    msg.payload.should.be.an.Array();
+                    msg.payload[0].should.equal("ab");
+                    msg.payload[1].should.equal("cd");
+                    msg.payload[2].should.equal("ef");
+                    done();
+                }
+                catch (e) { done(e); }
+            });
+            n1.receive({ payload: "ab", parts: { id: 1, type: "array", ch: ",", index: 0, count: 3, len:2}});
+            n1.receive({ payload: "cd", parts: { id: 1, type: "array", ch: ",", index: 1, count: 3, len:2}});
+            n1.receive({ payload: "ef", parts: { id: 1, type: "array", ch: ",", index: 2, count: 3, len:2}});
+        });
+    });
+
+    it('should concat payload when group.type is buffer and group.joinChar is undefined', function (done) {
+        var flow = [{ id: "n1", type: "join", wires: [["n2"]], joiner: ",", build: "buffer", mode: "auto" },
+                    { id: "n2", type: "helper" }];
+        helper.load(joinNode, flow, function () {
+            var n1 = helper.getNode("n1");
+            var n2 = helper.getNode("n2");
+            n2.on("input", function (msg) {
+                try {
+                    msg.should.have.property("payload");
+                    Buffer.isBuffer(msg.payload).should.be.true();
+                    msg.payload.toString().should.equal("ABC");
+                    done();
+                }
+                catch (e) { done(e); }
+            });
+            n1.receive({ payload: Buffer.from("A"), parts: { id: 1, type: "buffer", index: 0, count: 3 } });
+            n1.receive({ payload: Buffer.from("B"), parts: { id: 1, type: "buffer", index: 1, count: 3 } });
+            n1.receive({ payload: Buffer.from("C"), parts: { id: 1, type: "buffer", index: 2, count: 3 } });
+        });
+    });
+
+    it('should concat payload when group.type is string and group.joinChar is not string', function (done) {
+        var flow = [{ id: "n1", type: "join", wires: [["n2"]], joiner: ",", build: "buffer", mode: "auto" },
+                    { id: "n2", type: "helper" }];
+        helper.load(joinNode, flow, function () {
+            var n1 = helper.getNode("n1");
+            var n2 = helper.getNode("n2");
+            n2.on("input", function (msg) {
+                try {
+                    msg.should.have.property("payload");
+                    msg.payload.toString().should.equal("A0B0C");
+                    done();
+                }
+                catch (e) { done(e); }
+            });
+            n1.receive({ payload: Buffer.from("A"), parts: { id: 1, type: "string", ch: Buffer.from("0"), index: 0, count: 3 } });
+            n1.receive({ payload: Buffer.from("B"), parts: { id: 1, type: "string", ch: Buffer.from("0"), index: 1, count: 3 } });
+            n1.receive({ payload: Buffer.from("C"), parts: { id: 1, type: "string", ch: Buffer.from("0"), index: 2, count: 3 } });
+        });
+    });
+
+    it('should handle msg.parts property when mode is auto and parts or id are missing', function (done) {
+        var flow = [{ id: "n1", type: "join", wires: [["n2"]], joiner: "[44]", joinerType: "bin", build: "string", mode: "auto" },
+                    { id: "n2", type: "helper" }];
+        helper.load(joinNode, flow, function () {
+            var n1 = helper.getNode("n1");
+            var n2 = helper.getNode("n2");
+            n2.on("input", function (msg) {
+                done(new Error("This path does not go through."));
+            });
+            n1.receive({ payload: "A", parts: { type: "string", ch: ",", index: 0, count: 2 } });
+            n1.receive({ payload: "B", parts: { type: "string", ch: ",", index: 1, count: 2 } });
+            setTimeout(function () {
+                done();
+            }, TimeoutForErrorCase);
+        });
+    });
+
 });

test/nodes/core/logic/18-sort_spec.js

@@ -214,8 +214,6 @@ describe('SORT node', function() {
         });
     })();
     
-    return;
-    
     (function() {
         var flow = [{id:"n1", type:"sort", order:"descending", as_num:false, wires:[["n2"]]},
                         {id:"n2", type:"helper"}];
@@ -251,8 +249,6 @@ describe('SORT node', function() {
         });
     });
     
-    return;
-    
     it('should handle too many pending messages', function(done) {
         var flow = [{id:"n1", type:"sort", order:"ascending", as_num:false, target:"payload", targetType:"seq", seqKey:"payload", seqKeyType:"msg", wires:[["n2"]]},
                     {id:"n2", type:"helper"}];

test/nodes/core/parsers/70-JSON_spec.js

@@ -247,4 +247,85 @@ describe('JSON node', function() {
             });
         });
     });
+
+    it('should pass an object if provided a valid JSON string and schema', function(done) {
+        var flow = [{id:"jn1",type:"json",wires:[["jn2"]]},
+                    {id:"jn2", type:"helper"}];
+        helper.load(jsonNode, flow, function() {
+            var jn1 = helper.getNode("jn1");
+            var jn2 = helper.getNode("jn2");
+            jn2.on("input", function(msg) {
+                should.equal(msg.payload.number, 3);
+                should.equal(msg.payload.string, "allo");
+                done();
+            });
+            var jsonString =  '{"number": 3, "string": "allo"}';
+            var schema = {title: "testSchema", type: "object", properties: {number: {type: "number"}, string: {type: "string" }}};
+            jn1.receive({payload:jsonString, schema:schema});
+        });
+    });
+
+    it('should pass a string if provided a valid object and schema', function(done) {
+        var flow = [{id:"jn1",type:"json",wires:[["jn2"]]},
+                    {id:"jn2", type:"helper"}];
+        helper.load(jsonNode, flow, function() {
+            var jn1 = helper.getNode("jn1");
+            var jn2 = helper.getNode("jn2");
+            jn2.on("input", function(msg) {
+                should.equal(msg.payload, '{"number":3,"string":"allo"}');
+                done();
+            });
+            var obj =  {"number": 3, "string": "allo"};
+            var schema = {title: "testSchema", type: "object", properties: {number: {type: "number"}, string: {type: "string" }}};
+            jn1.receive({payload:obj, schema:schema});
+        });
+    });
+
+    it('should log an error if passed an invalid object and valid schema', function(done) {
+        var flow = [{id:"jn1",type:"json",wires:[["jn2"]]},
+                    {id:"jn2", type:"helper"}];
+        helper.load(jsonNode, flow, function() {
+            try {
+                var jn1 = helper.getNode("jn1");
+                var jn2 = helper.getNode("jn2");
+                var schema = {title: "testSchema", type: "object", properties: {number: {type: "number"}, string: {type: "string" }}};
+                var obj =  {"number": "foo", "string": 3};
+                jn1.receive({payload:obj, schema:schema});
+                var logEvents = helper.log().args.filter(function(evt) {
+                    return evt[0].type == "json";
+                });
+                logEvents.should.have.length(1);
+                logEvents[0][0].should.have.a.property('msg');
+                logEvents[0][0].msg.should.equal("json.errors.schema-error: data.number should be number, data.string should be string");
+                logEvents[0][0].should.have.a.property('level',helper.log().ERROR);
+                done();
+            } catch(err) {
+                done(err);
+            }
+        });
+    });
+
+    it('should log an error if passed a valid object and invalid schema', function(done) {
+        var flow = [{id:"jn1",type:"json",wires:[["jn2"]]},
+                    {id:"jn2", type:"helper"}];
+        helper.load(jsonNode, flow, function() {
+            try {
+                var jn1 = helper.getNode("jn1");
+                var jn2 = helper.getNode("jn2");
+                var schema = "garbage";
+                var obj =  {"number": "foo", "string": 3};
+                jn1.receive({payload:obj, schema:schema});
+                var logEvents = helper.log().args.filter(function(evt) {
+                    return evt[0].type == "json";
+                });
+                logEvents.should.have.length(1);
+                logEvents[0][0].should.have.a.property('msg');
+                logEvents[0][0].msg.should.equal("json.errors.schema-error-compile");
+                logEvents[0][0].should.have.a.property('level',helper.log().ERROR);
+                done();
+            } catch(err) {
+                done(err);
+            }
+        });
+    });
 });