/* eslint-disable no-undef */
/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * 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 csvNode = require("nr-test-utils").require("@node-red/nodes/core/parsers/70-CSV.js");
var helper = require("node-red-node-test-helper");
// const { neq } = require("semver");

describe('CSV node', function() {

    before(function(done) {
        helper.startServer(done);
    });

    after(function(done) {
        helper.stopServer(done);
    });

    afterEach(function() {
        helper.unload();
    });

    it('should be loaded with defaults', function(done) {
        var flow = [{id:"csvNode1", type:"csv", name: "csvNode" }];
        helper.load(csvNode, flow, function() {
            var n1 = helper.getNode("csvNode1");
            n1.should.have.property('name', 'csvNode');
            n1.should.have.property('template','');
            n1.should.have.property('sep', ',');
            n1.should.have.property('quo', '"');
            n1.should.have.property('ret', '\n');
            n1.should.have.property('winflag', false);
            n1.should.have.property('lineend', '\n');
            n1.should.have.property('multi', 'one');
            n1.should.have.property('hdrin', false);
            done();
        });
    });

    describe('csv to json', function() {
        var parts_id = undefined;

        afterEach(function() {
            parts_id = undefined;
        });

        function check_parts(msg, index, count) {
            msg.should.have.property('parts');
            if(parts_id === undefined) {
                parts_id = msg.parts.id;
            }
            else {
                msg.parts.should.have.property('id', parts_id);
            }
            msg.parts.should.have.property('index', index);
            msg.parts.should.have.property('count', count);
        }

        it('should convert a simple csv string to a javascript object', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, b: 2, c: 3, d: 4 });
                    msg.should.have.property('columns', "a,b,c,d");
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should convert a simple string to a javascript object with | separator (no template)', function(done) {
            var flow = [ { id:"n1", type:"csv", sep:"|", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { col1: 1, col2: 2, col3: 3, col4: 4 });
                    msg.should.have.property('columns', "col1,col2,col3,col4");
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1|2|3|4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should convert a simple string to a javascript object with tab separator (with template)', function(done) {
            var flow = [ { id:"n1", type:"csv", sep:"\t", temp:"A,B,,D", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { A: 1, B: 2, D: 4 });
                    msg.should.have.property('columns', "A,B,D");
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1\t2\t3\t4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should convert a simple string to a javascript object with space separator (with spaced template)', function(done) {
            var flow = [ { id:"n1", type:"csv", sep:" ", temp:"A, B, , D", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { A: 1, B: 2, D: 4 });
                    msg.should.have.property('columns', "A,B,D");
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1 2 3 4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        // it('should remove quotes and whitespace from template', function(done) {
        //     var flow = [ { id:"n1", type:"csv", temp:'"a",  "b" , " c "," d  " ', wires:[["n2"]] },
        //         {id:"n2", type:"helper"} ];
        //     helper.load(csvNode, flow, function() {
        //         var n1 = helper.getNode("n1");
        //         var n2 = helper.getNode("n2");
        //         n2.on("input", function(msg) {
        //             console.log("GOT",msg.payload)
        //             msg.should.have.property('payload', { a: 1, b: 2, " c ": 3, " d ": 4 });
        //             check_parts(msg, 0, 1);
        //             done();
        //         });
        //         var testString = "1,2,3,4"+String.fromCharCode(10);
        //         n1.emit("input", {payload:testString});
        //     });
        // });

        it('should create column names if no template provided', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:'', wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { col1: 1, col2: 2, col3: 3, col4: 4 });
                    msg.should.have.property('columns', "col1,col2,col3,col4");
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow dropping of fields from the template', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,,,d", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, d: 4 });
                    msg.should.have.property('columns', 'a,d');
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow commas and spaces in the template', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b b,\"c,c\",\" d, d \"", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, "b b":2, "c,c":3, " d, d ": 4 });
                    msg.should.have.property('columns', 'a,b b,"c,c"," d, d "');
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow passing in a template as first line of CSV', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, "b b":2, "c,c":3, " d, d ": 4 });
                    msg.should.have.property('columns', 'a,b b,"c,c"," d, d "');
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = 'a,b b,"c,c"," d, d "'+"\n"+"1,2,3,4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow passing in a template as first line of CSV (not comma)', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, sep:";", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, "b b":2, "c;c":3, " d, d ": 4 });
                    msg.should.have.property('columns', 'a,b b,c;c," d, d "');
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = 'a;b b;"c;c";" d, d "'+"\n"+"1;2;3;4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow passing in a template as first line of CSV (special char /)', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, sep:"/", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, "b b":2, "c/c":3, " d, d ": 4 });
                    msg.should.have.property('columns', 'a,b b,c/c," d, d "');
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = 'a/b b/"c/c"/" d, d "'+"\n"+"1/2/3/4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow passing in a template as first line of CSV (special char \\)', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, sep:"\\", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, "b b":2, "c\\c":3, " d, d ": 4 });
                    msg.should.have.property('columns', 'a,b b,c\\c," d, d "');
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = 'a\\b b\\"c\\c"\\" d, d "'+"\n"+"1\\2\\3\\4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should leave numbers starting with 0, e and + as strings (except 0.)', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 123, b: "0123", c: '+123', d: 'e123', e: 'E123', f: -123 });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = '123,0123,+123,e123,E123,-123'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should not parse numbers when told not to do so', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", strings:false, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: "1.23", b: "0123", c: "+123", d: "e123", e: "0", f: "-123", g: "1e3" });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = '1.23,0123,+123,e123,0,-123,1e3'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should parse numbers when told to do so', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1.23, b: -123, c: 1000, d: 0 });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = ' 1.23 ,  -123,1e3 ,    0  '+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should leave handle strings with scientific notation as numbers', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 12000, b: 0.012, c: -12000, d: -0.012 });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = '12E3,12e-3,-12e3,-12E-3'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });


        it('should allow quotes in the input (but drop blank strings)', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g,h", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    //console.log(msg);
                    msg.should.have.property('payload', { a:1, b:-2, c:'+3', d:'04', f:'-05', g:'ab"cd', h:'with,a,comma' });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = '"1","-2","+3","04","","-05","ab""cd","with,a,comma"'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow blank strings in the input if selected', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", include_empty_strings:true, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    //console.log(msg);
                    msg.should.have.property('payload', { a: 1, b: '', c: '', d: '', e: '-05', f: 'ab"cd', g: 'with,a,comma' });
                    //check_parts(msg, 0, 1);
                    done();
                });
                var testString = '"1","","","","-05","ab""cd","with,a,comma"'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should allow missing columns (nulls) in the input if selected', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", include_null_values:true, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    //console.log(msg);
                    msg.should.have.property('payload', { a: 1, b: null, c: '+3', d: null, e: '-05', f: 'ab"cd', g: 'with,a,comma' });
                    //check_parts(msg, 0, 1);
                    done();
                });
                var testString = '"1",,"+3",,"-05","ab""cd","with,a,comma"'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should handle cr and lf in the input', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    //console.log(msg);
                    msg.should.have.property('payload', { a: "with a\nnew line", b: "and a\rcarriage return", c: "and why\r\nnot both"});
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = '"with a'+String.fromCharCode(10)+'new line","and a'+String.fromCharCode(13)+'carriage return","and why\r\nnot both"'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should recover from an odd number of quotes in the input', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var c = 0;
                n2.on("input", function(msg) {
                    if (c == 0) {
                        c = 1;
                        msg.should.have.property('payload', { a: "with,an", b: "odd,number", c: "ofquotes\n" });
                        check_parts(msg, 0, 1);
                    }
                    else {
                        msg.should.have.property('payload', { a: "this is", b: "a normal", c: "line" });
                        check_parts(msg, 0, 1);
                        done();
                    }
                });
                var testString = '"with,a"n,odd","num"ber","of"qu"ot"es"'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
                n1.emit("input", {payload:'"this is","a normal","line"'});
            });
        });

        it('should recover from an odd number of quotes in the input (2)', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e,f,g", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var c = 0;
                n2.on("input", function(msg) {
                    //console.log(msg)
                    if (c == 0) {
                        c = 1;
                        msg.should.have.property('payload', { a: "with,an", b: "odd,number", c: "ofquotes\nthis is,a normal,line" });
                        check_parts(msg, 0, 1);
                    }
                    else {
                        msg.should.have.property('payload', { a: "this is", b: "another", c: "line" });
                        check_parts(msg, 0, 1);
                        done();
                    }
                });
                var testString = '"with,a"n,odd","num"ber","of"qu"ot"es"'+String.fromCharCode(10)+'"this is","a normal","line"'+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
                n1.emit("input", {payload:'"this is","another","line"'});
            });
        });

        it('should be able to use the first line as a template', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", hdrin:true, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var c = 0;
                n2.on("input", function(msg) {
                    //console.log(msg);
                    if (c === 0) {
                        msg.should.have.property('payload', { w: 1, x: 2, y: 3, z: 4 });
                        check_parts(msg, 0, 2);
                        c += 1;
                    }
                    else {
                        msg.should.have.property('payload', { w: 5, x: 6, y: 7, z: 8 });
                        check_parts(msg, 1, 2);
                        done();
                    }
                });
                var testString = "w,x,y,z\n1,2,3,4\n\n5,6,7,8";
                n1.emit("input", {payload:testString});
            });
        });

        it('should be able to output multiple lines as one array', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", multi:"yes", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', [ { a: 1, b: 2, c: 3, d: 4 },{ a: 5, b: -6, c: '07', d: '+8' },{ a: 9, b: 0, c: 'a', d: 'b' },{ a: 'c', b: 'd', c: 'e', d: 'f' } ]);
                    msg.should.have.property('columns','a,b,c,d');
                    msg.should.not.have.property('parts');
                    done();
                });
                var testString = "1,2,3,4\n5,-6,07,+8\n9,0,a,b\nc,d,e,f";
                n1.emit("input", {payload:testString});
            });
        });

        it('should be able to create an array from multiple parts', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, multi:"mult", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', [{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}]);
                    msg.should.have.property('columns','a,b,c');
                    msg.should.not.have.property('parts');
                    done();
                });

                n1.emit("input", {"payload":"a,b,c","parts":{"index":0,"ch":"\n","type":"string","id":"1"}});
                n1.emit("input", {"payload":"1,2,3","parts":{"index":1,"ch":"\n","type":"string","id":"1"}});
                n1.emit("input", {"payload":"4,5,6","parts":{"index":2,"ch":"\n","type":"string","id":"1"}});
                n1.emit("input", {"payload":"7,8,9","parts":{"index":3,count:4,"ch":"\n","type":"string","id":"1"}});
            });
        });

        it('should be able to output multiple objects as an array from an input of parts', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, multi:"yes", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', [{"Col1":"V1","Col2":"V2"},{"Col1":"V3","Col2":"V4"},{"Col1":"V5","Col2":"V6"}]);
                    msg.should.have.property('columns','Col1,Col2');
                    msg.should.have.property('parts');
                    done();
                });
                //var testString = "1,2,3,4\n5,-6,07,+8\n9,0,a,b\nc,d,e,f";
                // n1.emit("input", {payload:testString});
                n1.emit("input", {"payload":"Col1,Col2\nV1,V2\nV3,V4\nV5,V6","topic":"","parts":{"id":"3af07e18.865652","type":"array","count":2,"len":1,"index":0}});
                //n1.emit("input", {"payload":"Var1,Var2\nW1,W2\nW3,W4\nW5,W6","topic":"","parts":{"id":"3af07e18.865652","type":"array","count":2,"len":1,"index":1}});
            });
        });

        it('should handle numbers in strings but not IP addresses', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d,e", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: "a", b: "127.0.0.1", c: 56.7, d: -32.8, e: "+76.22C" });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "a,127.0.0.1,56.7,-32.8,+76.22C";
                n1.emit("input", {payload:testString});
            });
        });

        it('should preserve parts property', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 1, b: 2, c: 3, d: 4 });
                    check_parts(msg, 3, 4);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10);
                n1.emit("input", {payload:testString, parts: {id:"X", index:3, count:4} });
            });
        });

        it('should be able to use the first of multiple parts as a template if parts are present', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var c = 0;
                n2.on("input", function(msg) {
                    if (c === 0) {
                        msg.should.have.property('payload', { w: 1, x: 2, y: 3, z: 4 });
                        check_parts(msg, 0, 2);
                        c += 1;
                    }
                    else {
                        msg.should.have.property('payload', { w: 5, x: 6, y: 7, z: 8 });
                        check_parts(msg, 1, 2);
                        done();
                    }
                });
                var testString1 = "w,x,y,z\n";
                var testString2 = "1,2,3,4\n";
                var testString3 = "5,6,7,8\n";
                n1.emit("input", {payload:testString1, parts:{id:"X", index:0, count:3}});
                n1.emit("input", {payload:testString2, parts:{id:"X", index:1, count:3}});
                n1.emit("input", {payload:testString3, parts:{id:"X", index:2, count:3}});
            });
        });

        it('should skip several lines from start if requested', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", skip: 2, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { a: 9, b: 0, c: "A", d: "B" });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10)+"5,6,7,8"+String.fromCharCode(10)+"9,0,A,B"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should skip several lines from start then use next line as a template', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", hdrin:true, skip: 2, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    msg.should.have.property('payload', { "9": "C", "0": "D", "A": "E", "B": "F" });
                    check_parts(msg, 0, 1);
                    done();
                });
                var testString = "1,2,3,4"+String.fromCharCode(10)+"5,6,7,8"+String.fromCharCode(10)+"9,0,A,B"+String.fromCharCode(10)+"C,D,E,F"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should skip several lines from start and correct parts', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", skip: 2, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var c = 0;
                n2.on("input", function(msg) {
                    if (c===0) {
                        msg.should.have.property('payload', { a: 9, b: 0, c: "A", d: "B" });
                        check_parts(msg, 0, 2);
                        c = c+1;
                    }
                    else {
                        msg.should.have.property('payload', { a: "C", b: "D", c: "E", d: "F" });
                        check_parts(msg, 1, 2);
                        done();
                    }
                });
                var testString = "1,2,3,4"+String.fromCharCode(10)+"5,6,7,8"+String.fromCharCode(10)+"9,0,A,B"+String.fromCharCode(10)+"C,D,E,F"+String.fromCharCode(10);
                n1.emit("input", {payload:testString});
            });
        });

        it('should be able to skip and then use the first of multiple parts as a template if parts are present', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrin:true, skip:2, wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var c = 0;
                n2.on("input", function(msg) {
                    if (c === 0) {
                        msg.should.have.property('payload', { w: 1, x: 2, y: 3, z: 4 });
                        msg.should.have.property('columns', 'w,x,y,z');
                        check_parts(msg, 0, 2);
                        c += 1;
                    }
                    else {
                        msg.should.have.property('payload', { w: 5, x: 6, y: 7, z: 8 });
                        msg.should.have.property('columns', 'w,x,y,z');
                        check_parts(msg, 1, 2);
                        done();
                    }
                });
                var testStringA = "foo\n";
                var testStringB = "bar\n";
                var testString1 = "w,x,y,z\n";
                var testString2 = "1,2,3,4\n";
                var testString3 = "5,6,7,8\n";
                n1.emit("input", {payload:testStringA, parts:{id:"X", index:0, count:5}});
                n1.emit("input", {payload:testStringB, parts:{id:"X", index:1, count:5}});
                n1.emit("input", {payload:testString1, parts:{id:"X", index:2, count:5}});
                n1.emit("input", {payload:testString2, parts:{id:"X", index:3, count:5}});
                n1.emit("input", {payload:testString3, parts:{id:"X", index:4, count:5}});
            });
        });

    });

    describe('json object to csv', function() {

        it('should convert a simple object back to a csv', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,,e,f,g,h,i,j,k", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '4,foo,true,,0,"Hello\nWorld",,,undefined,null,null\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = { e:0, d:1, b:"foo", c:true, a:4, f:"Hello\nWorld", h:undefined, i:"undefined",j:null,k:"null" };
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert a simple object back to a csv with no template', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:" ", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '1,foo,"ba""r","di,ng",,undefined,null\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = { d:1, b:"foo", c:"ba\"r", a:"di,ng", e:undefined, f:"undefined", g:null,h:"null" };
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert a simple object back to a tsv using a tab as a separator', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", sep:"\t", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '1\tfoo\t"ba""r"\tdi,ng\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = { d:1, b:"foo", c:"ba\"r", a:"di,ng" };
                n1.emit("input", {payload:testJson});
            });
        });

        it('should handle a template with spaces in the property names', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b o,c p,,e", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '4,foo,true,,0\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = { e:0, d:1, "b o":"foo", "c p":true, a:4 };
                n1.emit("input", {payload:testJson});
            });
        });

        it('should handle a template with quotes in the property names', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrout:"all", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', 'a"a,b\'b\nA1,B1\nA2,B2\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [
                    {
                        "a\"a": "A1",
                        "b'b": "B1"
                    },
                    {
                        "a\"a": "A2",
                        "b'b": "B2"
                    }
                ]
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert an array of objects to a multi-line csv', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,d,c,b", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '4,1,2,3\n1,4,3,2\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{ d:1, b:3, c:2, a:4 },{d:4, a:1, c:3, b:2}];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert an array of objects to a multi-line csv and add a header', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", hdrout:"all", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', 'a,b,c,d\n4,3,2,1\n1,2,3,"a\nb"\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{ d:1, b:3, c:2, a:4 },{d:"a\nb", a:1, c:3, b:2}];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert an array of objects to a multi-line csv without a template', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '1,3,2,4\n4,2,3,1\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{ d: 1, b: 3, c: 2, a: 4 },{d:4,a:1,c:3,b:2}];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert an array of objects to a multi-line csv without a template and with a header', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrout:"all", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', 'd,b,c,a\n1,3,2,4\n4,"f\ng",3,1\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{ d: 1, b: 3, c: 2, a: 4 },{d:4,a:1,c:3,b:"f\ng"}];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert a simple array back to a csv', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', ',0,1,foo,"ba""r","di,ng","fa\nba"\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = ["",0,1,"foo",'ba"r','di,ng',"fa\nba"];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should convert an array of arrays back to a multi-line csv', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '0,1,2,3,4\n4,3,2,1,0\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [[0,1,2,3,4],[4,3,2,1,0]];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should be able to include column names as first row', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", hdrout:true, ret:"\r\n", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', 'a,b,c,d\r\n4,3,2,1\r\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{ d: 1, b: 3, c: 2, a: 4 }];
                n1.emit("input", {payload:testJson});
            });
        });

        it('should be able to include column names as first row, and missing properties', function(done) {
            var flow = [ { id:"n1", type:"csv", hdrout:true, ret:"\r\n", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', 'col1,col2,col3,col4\r\nH1,H2,H3,H4\r\nA,B,,\r\nA,,C,\r\nA,,,"D\nE"\r\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{"col1":"H1","col2":"H2","col3":"H3","col4":"H4"},{"col1":"A","col2":"B"},{"col1":"A","col3":"C"},{"col1":"A","col4":"D\nE"}];
                n1.emit("input", {payload:testJson});
            });
        });


        it('should be able to pass in column names', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"", hdrout:"once", ret:"\r\n", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                var count = 0;
                n2.on("input", function(msg) {
                    count += 1;
                    try {
                        if (count === 1) {
                            msg.should.have.property('payload', 'a,,b,a\r\n4,,3,4\r\n');
                        }
                        if (count === 3) {
                            msg.should.have.property('payload', '4,,3,4\r\n');
                            done()
                        }
                    }
                    catch(e) { done(e); }
                });
                var testJson = [{ d: 1, b: 3, c: 2, a: 4 }];
                n1.emit("input", {payload:testJson, columns:"a,,b,a", parts:{index:0}});
                n1.emit("input", {payload:testJson, parts:{index:1}});
                n1.emit("input", {payload:testJson, parts:{index:2}});
            });
        });

        it('should be able to pass in column names - with payload as an array', function(done) {
            var flow = [ { id:"n1", type:"csv", hdrout:"once", ret:"\r\n", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', 'a,,b,a\r\n4,,3,4\r\n4,,3,4\r\n4,,3,4\r\n');
                        done()
                    }
                    catch(e) { done(e); }
                });
                var testJson = { d: 1, b: 3, c: 2, a: 4 };
                n1.emit("input", {payload:[testJson,testJson,testJson], columns:"a,,b,a"});
            });
        });

        it('should handle quotes and sub-properties', function(done) {
            var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
                {id:"n2", type:"helper"} ];
            helper.load(csvNode, flow, function() {
                var n1 = helper.getNode("n1");
                var n2 = helper.getNode("n2");
                n2.on("input", function(msg) {
                    try {
                        msg.should.have.property('payload', '{},"text,with,commas","This ""is"" a banana","{""sub"":""object""}"\n');
                        done();
                    }
                    catch(e) { done(e); }
                });
                var testJson = { d: {sub:"object"}, b: "text,with,commas", c: 'This "is" a banana', a: {sub2:undefined} };
                n1.emit("input", {payload:testJson});
            });
        });

    });

    it('should just pass through if no payload provided', function(done) {
        var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
            {id:"n2", type:"helper"} ];
        helper.load(csvNode, flow, function() {
            var n1 = helper.getNode("n1");
            var n2 = helper.getNode("n2");
            n2.on("input", function(msg) {
                try {
                    msg.should.have.property('topic', { a: 4, b: 3, c: 2, d: 1 });
                    msg.should.not.have.property('payload');

                    done();
                }
                catch(e) { done(e); }
            });
            var testJson = { d: 1, b: 3, c: 2, a: 4 };
            n1.emit("input", {topic:testJson});
        });
    });

    it('should warn if provided a number or boolean', function(done) {
        var flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[["n2"]] },
            {id:"n2", type:"helper"} ];
        helper.load(csvNode, flow, function() {
            var n1 = helper.getNode("n1");
            var n2 = helper.getNode("n2");
            setTimeout(function() {
                try {
                    var logEvents = helper.log().args.filter(function(evt) {
                        return evt[0].type == "csv";
                    });
                    logEvents.should.have.length(2);
                    logEvents[0][0].should.have.a.property('msg');
                    logEvents[0][0].msg.toString().should.startWith('csv.errors.csv_js');
                    logEvents[1][0].should.have.a.property('msg');
                    logEvents[1][0].msg.toString().should.startWith('csv.errors.csv_js');
                    done();
                } catch(err) {
                    done(err);
                }
            },150);
            n1.emit("input", {payload:1});
            n1.emit("input", {payload:true});
        });
    });

    it('should call done when message processing is completed', function(done) {
        const completeNode = require("nr-test-utils").require("@node-red/nodes/core/common/24-complete.js");
        const flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[[]]},
            { id:"c1", type:"complete", scope: ["n1"], uncaught:false, wires:[["h1"]]},
            { id:"h1", type:"helper", wires:[[]]} ];
        helper.load([csvNode,completeNode], flow, function() {
            const n1 = helper.getNode("n1");
            const h1 = helper.getNode("h1");
            h1.on("input", function(msg) {
                try {
                    msg.should.have.a.property('payload', "1,2,3,4");
                    done();
                } catch (e) {
                    done(e);
                }
            });
            n1.receive({payload:"1,2,3,4"});
        });
    });

    it('should call done when input causes an error', function(done) {
        const completeNode = require("nr-test-utils").require("@node-red/nodes/core/common/24-complete.js");
        const flow = [ { id:"n1", type:"csv", temp:"a,b,c,d", wires:[[]]},
            { id:"c1", type:"complete", scope: ["n1"], uncaught:false, wires:[["h1"]]},
            { id:"h1", type:"helper", wires:[[]]} ];
        helper.load([csvNode,completeNode], flow, function() {
            const n1 = helper.getNode("n1");
            const h1 = helper.getNode("h1");
            h1.on("input", function(msg) {
                try {
                    msg.should.have.a.property('payload', 1);
                    done();
                } catch (e) {
                    done(e);
                }
            });
            n1.receive({payload:1}); // neither object nor string
        });
    });
});