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node-red/test/nodes/core/io/31-tcprequest_spec.js

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/**
* 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 net = require("net");
var should = require("should");
var stoppable = require('stoppable');
var helper = require("node-red-node-test-helper");
var tcpinNode = require("../../../../nodes/core/io/31-tcpin.js");
const RED = require("../../../../red/red.js");
describe('TCP Request Node', function() {
var server = undefined;
var port = 9000;
function startServer(done) {
port += 1;
server = stoppable(net.createServer(function(c) {
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c.on('data', function(data) {
var rdata = "ACK:"+data.toString();
c.write(rdata);
});
c.on('error', function(err) {
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startServer(done);
});
})).listen(port, "127.0.0.1", function(err) {
done();
});
}
before(function(done) {
startServer(done);
});
after(function(done) {
server.stop(done);
});
afterEach(function() {
helper.unload();
});
function testTCP(flow, val0, val1, done) {
helper.load(tcpinNode, flow, function() {
var n1 = helper.getNode("n1");
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
try {
msg.should.have.property('payload', Buffer(val1));
done();
} catch(err) {
done(err);
}
});
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if((typeof val0) === 'object') {
n1.receive(val0);
} else {
n1.receive({payload:val0});
}
});
}
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function testTCPMany(flow, values, result, done) {
helper.load(tcpinNode, flow, () => {
const n1 = helper.getNode("n1");
const n2 = helper.getNode("n2");
n2.on("input", msg => {
try {
msg.should.have.property('payload', Buffer(result));
done();
} catch(err) {
done(err);
}
});
values.forEach(value => {
n1.receive(typeof value === 'object' ? value : {payload: value});
});
});
}
describe('single message', function () {
it('should send & recv data', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"time", splitc: "0", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCP(flow, "foo", "ACK:foo", done)
});
it('should send & recv data when specified character received', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"char", splitc: "0", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCP(flow, "foo0bar0", "ACK:foo0", done);
});
it('should send & recv data after fixed number of chars received', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"count", splitc: "7", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCP(flow, "foo bar", "ACK:foo", done);
});
it('should send & receive, then keep connection', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"sit", splitc: "5", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCP(flow, "foo", "ACK:foo", done);
});
it('should send & recv data to/from server:port from msg', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"", port:"", out:"time", splitc: "0", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCP(flow, {payload:"foo", host:"localhost", port:port}, "ACK:foo", done)
});
});
describe('many messages', function () {
it('should send & recv data', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"time", splitc: "0", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCPMany(flow, ['f', 'o', 'o'], 'ACK:foo', done);
});
it('should send & recv data when specified character received', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"char", splitc: "0", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCPMany(flow, ["foo0","bar0"], "ACK:foo0", done);
});
it('should send & recv data after fixed number of chars received', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"count", splitc: "7", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCPMany(flow, ["fo", "ob", "ar"], "ACK:foo", done);
});
it('should send & receive, then keep connection', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"sit", splitc: "5", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCPMany(flow, ["foo", "bar", "baz"], "ACK:foobarbaz", done);
});
it('should send & recv data to/from server:port from msg', function(done) {
var flow = [{id:"n1", type:"tcp request", server:"", port:"", out:"time", splitc: "0", wires:[["n2"]] },
{id:"n2", type:"helper"}];
testTCPMany(flow, [
{payload:"f", host:"localhost", port:port},
{payload:"o", host:"localhost", port:port},
{payload:"o", host:"localhost", port:port}], "ACK:foo", done);
});
it('should limit the queue size', function (done) {
RED.settings.tcpMsgQueueSize = 10;
var flow = [{id:"n1", type:"tcp request", server:"localhost", port:port, out:"sit", splitc: "5", wires:[["n2"]] },
{id:"n2", type:"helper"}];
// create one more msg than is allowed
const msgs = new Array(RED.settings.tcpMsgQueueSize + 1).fill('x');
const expected = msgs.slice(0, -1);
testTCPMany(flow, msgs, "ACK:" + expected.join(''), done);
});
});
});