[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / test / nodes / core / storage / 28-tail_spec.js

diff --git a/dgbuilder/test/nodes/core/storage/28-tail_spec.js b/dgbuilder/test/nodes/core/storage/28-tail_spec.js
new file mode 100644 (file)
index 0000000..0612457
--- /dev/null
+++ b/dgbuilder/test/nodes/core/storage/28-tail_spec.js
@@ -0,0 +1,165 @@
+/**
+ * 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);
+        });
+    });
+    */
+
+});