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node-red/test/nodes/core/common/60-link_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 should = require("should");
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var linkNode = require("nr-test-utils").require("@node-red/nodes/core/common/60-link.js");
var helper = require("node-red-node-test-helper");
describe('link Node', function() {
before(function(done) {
helper.startServer(done);
});
after(function(done) {
helper.stopServer(done);
});
afterEach(function() {
helper.unload();
});
it('should be loaded (link in)', function(done) {
var flow = [{id:"n1", type:"link in", name: "link-in" }];
helper.load(linkNode, flow, function() {
var n1 = helper.getNode("n1");
n1.should.have.property('name', 'link-in');
done();
});
});
it('should be loaded (link out)', function(done) {
var flow = [{id:"n1", type:"link out", name: "link-out" }];
helper.load(linkNode, flow, function() {
var n1 = helper.getNode("n1");
n1.should.have.property('name', 'link-out');
done();
});
});
it('should be linked', function(done) {
var flow = [{id:"n1", type:"link out", name: "link-out", links:["n2"]},
{id:"n2", type:"link in", name: "link-in", wires:[["n3"]]},
{id:"n3", type:"helper"}];
helper.load(linkNode, flow, function() {
var n1 = helper.getNode("n1");
var n3 = helper.getNode("n3");
n3.on("input", function(msg) {
try {
msg.should.have.property('payload', 'hello');
done();
} catch(err) {
done(err);
}
});
n1.receive({payload:"hello"});
});
});
it('should be linked to multiple nodes', function(done) {
var flow = [{id:"n1", type:"link out", name: "link-out", links:["n2", "n3"]},
{id:"n2", type:"link in", name: "link-in0", wires:[["n4"]]},
{id:"n3", type:"link in", name: "link-in1", wires:[["n4"]]},
{id:"n4", type:"helper"} ];
helper.load(linkNode, flow, function() {
var n1 = helper.getNode("n1");
var n4 = helper.getNode("n4");
var count = 0;
n4.on("input", function (msg) {
try {
msg.should.have.property('payload', 'hello');
count++;
if(count == 2) {
done();
}
} catch(err) {
done(err);
}
});
n1.receive({payload:"hello"});
});
});
it('should be linked from multiple nodes', function(done) {
var flow = [{id:"n1", type:"link out", name: "link-out0", links:["n3"]},
{id:"n2", type:"link out", name: "link-out1", links:["n3"]},
{id:"n3", type:"link in", name: "link-in", wires:[["n4"]]},
{id:"n4", type:"helper"} ];
helper.load(linkNode, flow, function() {
var n1 = helper.getNode("n1");
var n2 = helper.getNode("n2");
var n4 = helper.getNode("n4");
var count = 0;
n4.on("input", function(msg) {
try {
msg.should.have.property('payload', 'hello');
count++;
if(count == 2) {
done();
}
} catch(err) {
done(err);
}
});
n1.receive({payload:"hello"});
n2.receive({payload:"hello"});
});
});
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describe("link-call node", function() {
it('should call link-in node and get response', function(done) {
var flow = [{id:"link-in-1", type:"link in", wires: [[ "func"]]},
{id:"func", type:"helper", wires: [["link-out-1"]]},
{id:"link-out-1", type:"link out", mode: "return"},
{id:"link-call", type:"link call", links:["link-in-1"], wires:[["n4"]]},
{id:"n4", type:"helper"} ];
helper.load(linkNode, flow, function() {
var func = helper.getNode("func");
func.on("input", function(msg, send, done) {
msg.payload = "123";
send(msg);
done();
})
var n1 = helper.getNode("link-call");
var n4 = helper.getNode("n4");
n4.on("input", function(msg) {
try {
msg.should.have.property('payload', '123');
done();
} catch(err) {
done(err);
}
});
n1.receive({payload:"hello"});
});
})
});
it('should allow nested link-call flows', function(done) {
var flow = [/** Multiply by 2 link flow **/
{id:"li1", type:"link in", wires: [[ "m2"]]},
{id:"m2", type:"helper", wires: [["lo1"]]},
{id:"lo1", type:"link out", mode: "return"},
/** Multiply by 3 link flow **/
{id:"li2", type:"link in", wires: [[ "m3"]]},
{id:"m3", type:"helper", wires: [["lo2"]]},
{id:"lo2", type:"link out", mode: "return"},
/** Multiply by 6 link flow **/
{id:"li3", type:"link in", wires: [[ "link-call-1"]]},
{id:"link-call-1", type:"link call", links:["m2"], wires:[["link-call-2"]]},
{id:"link-call-2", type:"link call", links:["m3"], wires:[["lo3"]]},
{id:"lo3", type:"link out", mode: "return"},
/** Test Flow Entry **/
{id:"link-call", type:"link call", links:["li3"], wires:[["n4"]]},
{id:"n4", type:"helper"} ];
helper.load(linkNode, flow, function() {
var m2 = helper.getNode("m2");
m2.on("input", function(msg, send, done) { msg.payload *= 2 ; send(msg); done(); })
var m3 = helper.getNode("m3");
m3.on("input", function(msg, send, done) { msg.payload *= 3 ; send(msg); done(); })
var n1 = helper.getNode("link-call");
var n4 = helper.getNode("n4");
n4.on("input", function(msg) {
try {
msg.should.have.property('payload', 24);
done();
} catch(err) {
done(err);
}
});
n1.receive({payload:4});
});
})
});