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

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/**
* Copyright 2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var should = require("should");
var jsonNode = require("../../../../nodes/core/parsers/70-JSON.js");
var helper = require("../../helper.js");
describe('JSON node', function() {
before(function(done) {
helper.startServer(done);
});
afterEach(function() {
helper.unload();
});
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it('should be loaded', function(done) {
var flow = [{id:"jsonNode1", type:"json", name: "jsonNode" }];
helper.load(jsonNode, flow, function() {
var jsonNode1 = helper.getNode("jsonNode1");
jsonNode1.should.have.property('name', 'jsonNode');
done();
});
});
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it('should convert a valid json string to a javascript object', function(done) {
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var flow = [{id:"jn1",type:"json",wires:[["jn2"]],func:"return msg;"},
{id:"jn2", type:"helper"}];
helper.load(jsonNode, flow, function() {
var jn1 = helper.getNode("jn1");
var jn2 = helper.getNode("jn2");
jn2.on("input", function(msg) {
msg.should.have.property('topic', 'bar');
msg.payload.should.have.property('employees');
msg.payload.employees[0].should.have.property('firstName', 'John');
msg.payload.employees[0].should.have.property('lastName', 'Smith');
done();
});
var jsonString = '{"employees":[{"firstName":"John", "lastName":"Smith"}]}';
jn1.receive({payload:jsonString,topic: "bar"});
});
});
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it('should convert a javascript object to a json string', function(done) {
var flow = [{id:"jn1",type:"json",wires:[["jn2"]],func:"return msg;"},
{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, '{"employees":[{"firstName":"John","lastName":"Smith"}]}');
done();
});
var obj = {employees:[{firstName:"John", lastName:"Smith"}]};
jn1.receive({payload:obj});
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});
});
it('should convert a array to a json string', function(done) {
var flow = [{id:"jn1",type:"json",wires:[["jn2"]],func:"return msg;"},
{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, '[1,2,3]');
done();
});
var obj = [1,2,3];
jn1.receive({payload:obj});
});
});
it('should log an error if asked to parse an invalid json string', function(done) {
var flow = [{id:"jn1",type:"json",wires:[["jn2"]],func:"return msg;"},
{id:"jn2", type:"helper"}];
helper.load(jsonNode, flow, function() {
try {
var jn1 = helper.getNode("jn1");
var jn2 = helper.getNode("jn2");
jn1.receive({payload:'foo',topic: "bar"});
var logEvents = helper.log().args.filter(function(evt) {
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return evt[0].type == "json";
});
logEvents.should.have.length(1);
logEvents[0][0].should.have.a.property('msg');
logEvents[0][0].msg.should.startWith("Unexpected token o");
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logEvents[0][0].should.have.a.property('level',helper.log().ERROR);
done();
} catch(err) {
done(err);
}
});
});
it('should log an error if asked to parse something thats not json or js', function(done) {
var flow = [{id:"jn1",type:"json",wires:[["jn2"]],func:"return msg;"},
{id:"jn2", type:"helper"}];
helper.load(jsonNode, flow, function() {
var jn1 = helper.getNode("jn1");
var jn2 = helper.getNode("jn2");
setTimeout(function() {
try {
var logEvents = helper.log().args.filter(function(evt) {
return evt[0].type == "json";
});
logEvents.should.have.length(3);
logEvents[0][0].should.have.a.property('msg');
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logEvents[0][0].msg.toString().should.eql('json.errors.dropped');
logEvents[1][0].should.have.a.property('msg');
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logEvents[1][0].msg.toString().should.eql('json.errors.dropped');
logEvents[2][0].should.have.a.property('msg');
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logEvents[2][0].msg.toString().should.eql('json.errors.dropped-object');
done();
} catch(err) {
done(err);
}
},150);
jn1.receive({payload:true});
jn1.receive({payload:1});
jn1.receive({payload:new Buffer("a")});
});
});
it('should pass straight through if no payload set', function(done) {
var flow = [{id:"jn1",type:"json",wires:[["jn2"]],func:"return msg;"},
{id:"jn2", type:"helper"}];
helper.load(jsonNode, flow, function() {
var jn1 = helper.getNode("jn1");
var jn2 = helper.getNode("jn2");
jn2.on("input", function(msg) {
msg.should.have.property('topic', 'bar');
msg.should.not.have.property('payload');
done();
});
jn1.receive({topic: "bar"});
});
});
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});