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File node: recreate write stream when file deleted

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Fixes #1351
This commit is contained in:
Nick O'Leary
2017-07-22 22:28:45 +01:00
parent f0373cd789
commit 2aced893c6
2 changed files with 146 additions and 10 deletions
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111
test/nodes/core/storage/50-file_spec.js
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@@ -67,6 +67,9 @@ describe('file Nodes', function() {
it('should append to a file and add newline', function(done) {
var flow = [{id:"fileNode1", type:"file", name: "fileNode", "filename":fileToTest, "appendNewline":true, "overwriteFile":false}];
try {
fs.unlinkSync(fileToTest);
}catch(err) {}
helper.load(fileNode, flow, function() {
var n1 = helper.getNode("fileNode1");
n1.emit("input", {payload:"test2"}); // string
@@ -94,6 +97,92 @@ describe('file Nodes', function() {
});
});
it('should append to a file after it has been deleted ', function(done) {
var flow = [{id:"fileNode1", type:"file", name: "fileNode", "filename":fileToTest, "appendNewline":false, "overwriteFile":false}];
try {
fs.unlinkSync(fileToTest);
} catch(err) {}
helper.load(fileNode, flow, function() {
var n1 = helper.getNode("fileNode1");
// Send two messages to the file
n1.emit("input", {payload:"one"});
n1.emit("input", {payload:"two"});
setTimeout(function() {
try {
// Check they got appended as expected
var f = fs.readFileSync(fileToTest).toString();
f.should.equal("onetwo");
// Delete the file
fs.unlinkSync(fileToTest);
// Send two more messages to the file
n1.emit("input", {payload:"three"});
n1.emit("input", {payload:"four"});
setTimeout(function() {
// Check the file was updated
try {
var f = fs.readFileSync(fileToTest).toString();
f.should.equal("threefour");
fs.unlinkSync(fileToTest);
done();
} catch(err) {
done(err);
}
},wait);
} catch(err) {
done(err);
}
},wait);
});
});
it('should append to a file after it has been recreated ', function(done) {
var flow = [{id:"fileNode1", type:"file", name: "fileNode", "filename":fileToTest, "appendNewline":false, "overwriteFile":false}];
try {
fs.unlinkSync(fileToTest);
} catch(err) {}
helper.load(fileNode, flow, function() {
var n1 = helper.getNode("fileNode1");
// Send two messages to the file
n1.emit("input", {payload:"one"});
n1.emit("input", {payload:"two"});
setTimeout(function() {
try {
// Check they got appended as expected
var f = fs.readFileSync(fileToTest).toString();
f.should.equal("onetwo");
// Delete the file
fs.unlinkSync(fileToTest);
// Recreate it
fs.writeFileSync(fileToTest,"");
// Send two more messages to the file
n1.emit("input", {payload:"three"});
n1.emit("input", {payload:"four"});
setTimeout(function() {
// Check the file was updated
try {
var f = fs.readFileSync(fileToTest).toString();
f.should.equal("threefour");
fs.unlinkSync(fileToTest);
done();
} catch(err) {
done(err);
}
},wait);
} catch(err) {
done(err);
}
},wait);
});
});
it('should use msg.filename if filename not set in node', function(done) {
var flow = [{id:"fileNode1", type:"file", name: "fileNode", "appendNewline":true, "overwriteFile":true}];
helper.load(fileNode, flow, function() {
@@ -407,7 +496,8 @@ describe('file Nodes', function() {
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
msg.should.have.property('payload');
msg.payload.should.have.length(40).and.be.a.Buffer;
Buffer.isBuffer(msg.payload).should.be.true();
msg.payload.should.have.length(40);
msg.payload.toString().should.equal('File message line 1\nFile message line 2\n');
done();
});
@@ -422,10 +512,15 @@ describe('file Nodes', function() {
var n1 = helper.getNode("fileInNode1");
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
msg.should.have.property('payload');
msg.payload.should.have.length(40).and.be.a.string;
msg.payload.should.equal("File message line 1\nFile message line 2\n");
done();
try {
msg.should.have.property('payload');
msg.payload.should.be.a.String();
msg.payload.should.have.length(40)
msg.payload.should.equal("File message line 1\nFile message line 2\n");
done();
} catch(err) {
done(err);
}
});
n1.receive({payload:""});
});
@@ -440,7 +535,8 @@ describe('file Nodes', function() {
var c = 0;
n2.on("input", function(msg) {
msg.should.have.property('payload');
msg.payload.should.have.length(19).and.be.a.string;
msg.payload.should.be.a.String();
msg.payload.should.have.length(19);
if (c === 0) {
msg.payload.should.equal("File message line 1");
c++;
@@ -466,7 +562,8 @@ describe('file Nodes', function() {
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
msg.should.have.property('payload');
msg.payload.should.have.length(40).and.be.a.Buffer;
Buffer.isBuffer(msg.payload).should.be.true();
msg.payload.should.have.length(40);
msg.should.have.property('parts');
msg.parts.should.have.property('count',1);
msg.parts.should.have.property('type','buffer');