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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 path = require('path');
var fs = require('fs-extra');
var mkdirp = require('mkdirp');
var tailNode = require("../../../../nodes/core/storage/28-tail.js");
var helper = require("../../helper.js");
describe('TailNode', function() {
var resourcesDir = path.join(__dirname,"..","..","..","resources");
var fileToTail = path.join(resourcesDir,"28-tail-test-file.txt");
beforeEach(function(done) {
fs.writeFileSync(fileToTail, "Tail message line 1\nTail message line 2\n");
helper.startServer(done);
});
afterEach(function(done) {
helper.unload().then(function() {
fs.unlinkSync(fileToTail);
helper.stopServer(done);
});
});
it('should be loaded', function(done) {
var flow = [{id:"tailNode1", type:"tail", name: "tailNode", "split":true, "filename":fileToTail}];
helper.load(tailNode, flow, function() {
var tailNode1 = helper.getNode("tailNode1");
tailNode1.should.have.property('name', 'tailNode');
done();
});
});
it('tail should tail a file', function(done) {
var flow = [{id:"tailNode1", type:"tail", name: "tailNode", "split":true, "filename":fileToTail, "wires":[["helperNode1"]]},
{id:"helperNode1", type:"helper", wires:[]}];
helper.load(tailNode, flow, function() {
var tailNode1 = helper.getNode("tailNode1");
var helperNode1 = helper.getNode("helperNode1");
var inputCounter = 0;
helperNode1.on("input", function(msg) {
//console.log(msg);
msg.should.have.property('topic', fileToTail);
msg.payload.should.equal("Tail message line " + (++inputCounter + 2));
if (inputCounter === 2) {
done();
}
});
setTimeout( function() {
fs.appendFileSync(fileToTail, "Tail message line 3\n");
fs.appendFileSync(fileToTail, "Tail message line 4\n");
},100);
});
});
it('tail should work in non-split mode', function(done) {
var flow = [{id:"tailNode1", type:"tail", name: "tailNode", "split":false, "filename":fileToTail, "wires":[["helperNode1"]]},
{id:"helperNode1", type:"helper", wires:[]}];
helper.load(tailNode, flow, function() {
var tailNode1 = helper.getNode("tailNode1");
var helperNode1 = helper.getNode("helperNode1");
helperNode1.on("input", function(msg) {
//console.log(msg);
msg.should.have.property('topic', fileToTail);
msg.payload.should.equal("Tail message line 5\nTail message line 6\n");
done();
});
setTimeout( function() {
fs.appendFileSync(fileToTail, "Tail message line 5\nTail message line 6\n");
},150);
});
});
it('tail should handle a non-existent file', function(done) {
fs.unlinkSync(fileToTail);
var flow = [{id:"tailNode1", type:"tail", name: "tailNode", "split":true, "filename":fileToTail, "wires":[["helperNode1"]]},
{id:"helperNode1", type:"helper", wires:[]}];
helper.load(tailNode, flow, function() {
var tailNode1 = helper.getNode("tailNode1");
var helperNode1 = helper.getNode("helperNode1");
helperNode1.on("input", function(msg) {
msg.should.have.property('topic', fileToTail);
msg.payload.should.equal("Tail message line");
done();
});
setTimeout( function() {
fs.writeFileSync(fileToTail, "Tail message line\n");
},150);
});
});
/*
it('tail should handle file truncation', function(done) {
var flow = [{id:"tailNode1", type:"tail", name: "tailNode", "split":true, "filename":fileToTail, "wires":[["helperNode1"]]},
{id:"helperNode1", type:"helper", wires:[]}];
helper.load(tailNode, flow, function() {
var tailNode1 = helper.getNode("tailNode1");
var helperNode1 = helper.getNode("helperNode1");
var inputCounter = 0;
var warned = false;
tailNode1.on("log", function(msg) {
if (msg.level == "warn") { warned = true; }
});
helperNode1.on("input", function(msg) {
console.log("inputCounter =",inputCounter);
console.log(msg);
msg.should.have.property('topic', fileToTail);
inputCounter++;
if (inputCounter === 1) {
warned.should.be.false;
msg.payload.should.equal("Tail message line append");
} else if (inputCounter === 2) {
msg.payload.should.equal("Tail message line truncate");
} else {
msg.payload.should.equal("Tail message line append "+inputCounter);
}
if (inputCounter === 5) {
setTimeout(function() {
warned.should.be.true;
done();
},100);
}
});
var actions = [
function() { fs.appendFileSync(fileToTail, "Tail message line append\n");},
function() { fs.writeFileSync(fileToTail, "Tail message line truncate\n");},
function() { fs.appendFileSync(fileToTail, "Tail message line append 3\n");},
function() { fs.appendFileSync(fileToTail, "Tail message line append 4\n");},
function() { fs.appendFileSync(fileToTail, "Tail message line append 5\n");}
];
function processAction() {
var action = actions.shift();
action();
if (actions.length > 0) {
setTimeout(function() {
processAction();
},250);
}
}
setTimeout( function() {
processAction();
},150);
});
});
*/
});
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