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test.js
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var fs = require ('graceful-fs');
var path = require ('path');
var surveil = require ('./index');
var YEPNOPE_TIMEOUT = 700;
function yepnope (callback) {
this.callback = callback;
}
yepnope.prototype.yep = function(){
var self = this;
this.timeout = setTimeout (function(){
if (!self.callback)
return;
self.callback();
self.callback = undefined;
}, YEPNOPE_TIMEOUT);
};
yepnope.prototype.nope = function (err) {
if (!this.callback)
return;
clearTimeout (this.timeout);
this.callback (err || new Error ('nope'));
this.callback = undefined;
};
yepnope.prototype.maybe = function(){
if (!this.callback)
return;
if (!this.timeout)
return;
clearTimeout (this.timeout);
this.yep();
};
try {
fs.mkdirSync ('test');
} catch (err) {
if (err.code != 'EEXIST')
throw err;
}
fs.readdirSync ('test').forEach (function (fname) { try {
fs.unlinkSync ('test/'+fname);
} catch (err) { /* nobody cares */ } });
describe ('existing directory', function(){
this.timeout (2000);
this.slow (1000);
it ('watches and emits "ready" event', function (callback) {
try {
var test = surveil ('test');
test.on ('ready', function (err) {
if (err)
return callback (err);
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
callback();
});
} catch (err) {
callback (err);
}
});
it ('emits the "add" event', function (callback) {
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('add', function (newName) {
if (newName != 'foo.txt')
return yip.nope (new Error ('incorrect filename: '+newName));
yip.yep();
});
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.writeFileSync ('test/foo.txt', 'double triple quadruple quintuple sextuple septuple octuple');
});
});
it ('emits the "remove" event', function (callback) {
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('remove', function (fname) {
if (fname != 'foo.txt')
return yip.nope (new Error ('incorrect filename: '+fname));
yip.yep();
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.unlinkSync ('test/foo.txt');
});
});
it ('emits the "change" event only once when writing several chunks', function (callback) {
fs.writeFileSync ('test/foo.txt', 'double triple quadruple quintuple sextuple septuple octuple');
var stream;
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
stream.end();
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var changed = false;
test.on ('change', function (fname) {
if (fname != 'foo.txt')
return yip.nope (new Error ('incorrect filename: '+fname));
if (changed)
return yip.nope (new Error ('repeat event change: '+fname));
changed = true;
yip.yep();
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
stream = fs.createWriteStream ('test/foo.txt');
var blocks = [
'double',
'triple',
'quadruple',
'quintuple',
'sextuple',
'septuple',
'octuple'
];
function writeToStream(){
var data = blocks.shift();
if (!data)
return;
yip.maybe();
for (var i=16; i; i--)
data += data;
stream.write (data);
setTimeout (writeToStream, 30);
}
writeToStream();
});
});
it ('does not emit "change" events during early file creation', function (callback) {
var stream;
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
stream.end();
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var added = false;
test.on ('add', function (fname) {
if (fname != 'bar.txt')
return yip.nope (new Error ('incorrect filename: '+fname));
if (added)
return yip.nope (new Error ('repeat event add: '+fname));
added = true;
yip.yep();
});
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
stream = fs.createWriteStream ('test/bar.txt');
var blocks = [
'double',
'triple',
'quadruple',
'quintuple',
'sextuple',
'septuple',
'octuple'
];
function writeToStream(){
var data = blocks.shift();
if (!data)
return;
for (var i=5; i; i--)
data += data;
stream.write (data);
setTimeout (writeToStream, 30);
}
writeToStream();
});
});
it ('emits "change" events correctly for a new file', function (callback) {
fs.unlinkSync ('test/foo.txt');
var stream;
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
stream.end();
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var added = false;
var changed = false;
var written = false;
test.on ('change', function (fname) {
if (fname != 'foo.txt')
return yip.nope (new Error ('incorrect filename: '+fname));
if (!written)
return yip.nope (new Error ('emitted change before any change occured'));
if (changed)
return yip.nope (new Error ('repeat event "change": '+fname));
if (!added)
return yip.nope (new Error ('unwanted early event "change": '+fname));
changed = true;
yip.yep();
});
test.on ('add', function (fname) {
if (added)
return yip.nope (new Error (
'repeat event "add": '+fname
));
if (changed)
return yip.nope (new Error (
'unwanted event "add": '+fname
));
added = true;
setTimeout (function(){
stream = fs.createWriteStream ('test/foo.txt');
var blocks = [
'double',
'triple',
'quadruple',
'quintuple',
'sextuple',
'septuple',
'octuple'
];
function writeToStream(){
var data = blocks.shift();
if (!data)
return;
for (var i=5; i; i--)
data += data;
written = true;
stream.write (data);
setTimeout (writeToStream, 30);
}
writeToStream();
}, 100);
});
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.writeFileSync ('test/foo.txt', 'double triple quadruple quintuple sextuple septuple octuple');
});
});
it ('emits "add" and "remove" when a file is renamed within the local directory', function (callback) {
fs.writeFileSync ('test/foo.txt', 'double triple quadruple quintuple sextuple septuple octuple');
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var added = false, removed = false;
test.on ('add', function (fname) {
if (fname != 'baz.txt')
return yip.nope (new Error ('incorrect filename: '+fname));
if (added)
return yip.nope (new Error ('repeat event add: '+fname));
added = true;
if (removed)
yip.yep();
});
test.on ('remove', function (fname) {
if (fname != 'foo.txt')
return yip.nope (new Error ('incorrect filename: '+fname));
if (removed)
return yip.nope (new Error ('repeat event remove: '+fname));
removed = true;
if (added)
yip.yep();
});
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.renameSync ('test/foo.txt', 'test/baz.txt');
});
});
it ('honors a list of extension filters', function (callback) {
fs.writeFileSync ('test/foo.txt', 'double triple quadruple quintuple sextuple septuple octuple');
fs.writeFileSync ('test/foo.bar', 'double triple quadruple quintuple sextuple septuple octuple');
fs.writeFileSync ('test/foo.baz', 'double triple quadruple quintuple sextuple septuple octuple');
try {
var test = surveil ('test', { extensions:[ '.bar', '.baz' ] });
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var changedBar = false;
var changedBaz = false;
test.on ('change', function (fname) {
if (fname == 'foo.txt')
return yip.nope (new Error ('should not be watching foo.txt'));
if (fname == 'foo.bar')
changedBar = true;
else if (fname == 'foo.baz')
changedBaz = true;
if (changedBar && changedBaz)
yip.yep();
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.writeFileSync ('test/foo.bar', 'the quick brown fox jumped over LEROOOOOY JEEEEENKIIIIINS');
fs.writeFileSync ('test/foo.baz', 'the quick brown fox jumped over LEROOOOOY JEEEEENKIIIIINS');
});
});
it ('honors a list of regex filters', function (callback) {
fs.writeFileSync ('test/abc', 'double triple quadruple quintuple sextuple septuple octuple');
fs.writeFileSync ('test/bac', 'double triple quadruple quintuple sextuple septuple octuple');
fs.writeFileSync ('test/cab', 'double triple quadruple quintuple sextuple septuple octuple');
fs.writeFileSync ('test/cdb', 'double triple quadruple quintuple sextuple septuple octuple');
try {
var test = surveil ('test', { patterns:[ /ab/, /cd/ ] });
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var changedABC = false;
var changedCAB = false;
var changedCDB = false;
test.on ('change', function (fname) {
if (fname == 'bac')
return yip.nope (new Error ('should not be watching bac'));
if (fname == 'abc')
changedABC = true;
else if (fname == 'cab')
changedCAB = true;
else if (fname == 'cdb')
changedCDB = true;
if (changedABC && changedCAB && changedCDB)
yip.yep();
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.writeFileSync ('test/abc', 'the quick brown fox jumped over LEROOOOOY JEEEEENKIIIIINS');
fs.writeFileSync ('test/cab', 'the quick brown fox jumped over LEROOOOOY JEEEEENKIIIIINS');
fs.writeFileSync ('test/cdb', 'the quick brown fox jumped over LEROOOOOY JEEEEENKIIIIINS');
});
});
it ('emits the "child" event', function (callback) {
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
var childrenEmitted = {
"foo.txt": false,
"foo.bar": false,
"foo.baz": false,
"bar.txt": false,
"baz.txt": false,
abc: false,
bac: false,
cab: false,
cdb: false
};
var readyEmitted = false;
test.on ('child', function (fname, stats) {
if (!Object.hasOwnProperty.call (childrenEmitted, fname))
return yip.nope (new Error ('incorrect filename:', fname));
if (readyEmitted)
return yip.nope (new Error ('emitted "child" event after "ready" event'));
if (childrenEmitted[fname])
return yip.nope (new Error ('emitted "child" more than once for filename:', fname));
childrenEmitted[fname] = true;
try {
if (!stats || stats.isDirectory())
return yip.nope (new Error ('failed to share stat results'));
} catch (err) {
return yip.nope (err);
}
for (var key in childrenEmitted)
if (!childrenEmitted[key])
return;
yip.yep();
});
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
readyEmitted = true;
});
});
it ('emits the "childDir" event', function (callback) {
fs.mkdirSync ('test/foodir');
try {
var test = surveil ('test');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
fs.rmdirSync ('test/foodir');
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
var readyEmitted = false;
var dirEmitted = false;
test.on ('childDir', function (dirname, stats) {
if (dirname != 'foodir')
return yip.nope (new Error ('incorrect dirname:', dirname));
if (readyEmitted)
return yip.nope (new Error ('emitted "child" event after "ready" event'));
if (dirEmitted)
return yip.nope (new Error ('emitted "childDir" more than once'));
dirEmitted = true;
try {
if (!stats || !stats.isDirectory())
return yip.nope (new Error ('failed to share stat results'));
} catch (err) {
return yip.nope (err);
}
yip.yep();
});
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
readyEmitted = true;
});
});
it ('ignores filename filters for the "childDir" event', function (callback) {
try {
fs.mkdirSync ('test/foodir');
} catch (err) {
if (err.code !== 'EEXIST')
throw err;
}
try {
var test = surveil ('test', { extensions:[ '.txt', '.xml' ] });
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
fs.rmdirSync ('test/foodir');
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
var readyEmitted = false;
var dirEmitted = false;
test.on ('childDir', function (dirname, stats) {
if (dirname != 'foodir')
return yip.nope (new Error ('incorrect dirname:', dirname));
if (readyEmitted)
return yip.nope (new Error ('emitted "child" event after "ready" event'));
if (dirEmitted)
return yip.nope (new Error ('emitted "childDir" more than once'));
dirEmitted = true;
try {
if (!stats || !stats.isDirectory())
return yip.nope (new Error ('failed to share stat results'));
} catch (err) {
return yip.nope (err);
}
yip.yep();
});
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
readyEmitted = true;
});
});
it ('emits the "addDir" event', function (callback) {
try {
var test = surveil ('test', { extensions:[ '.txt', '.xml' ] });
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
fs.rmdirSync ('test/foodir');
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
var dirEmitted = false;
test.on ('addDir', function (dirname, stats) {
if (dirname != 'foodir')
return yip.nope (new Error ('incorrect dirname:', dirname));
if (dirEmitted)
return yip.nope (new Error ('emitted "addDir" more than once'));
dirEmitted = true;
try {
if (!stats || !stats.isDirectory())
return yip.nope (new Error ('failed to share stat results'));
} catch (err) {
return yip.nope (err);
}
yip.yep();
});
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.mkdirSync ('test/foodir');
});
});
it ('emits the "removeDir" event', function (callback) {
fs.mkdirSync ('test/foodir');
try {
var test = surveil ('test', { extensions:[ '.txt', '.xml' ] });
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
try {
fs.rmdirSync ('test/foodir');
} catch (err) { /* it should be missing */ }
callback()
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
var dirEmitted = false;
test.on ('removeDir', function (dirname) {
if (dirname != 'foodir')
return yip.nope (new Error ('incorrect dirname:', dirname));
if (dirEmitted)
return yip.nope (new Error ('emitted "removeDir" more than once'));
dirEmitted = true;
yip.yep();
});
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
fs.rmdirSync ('test/foodir');
});
});
});
describe ('existing file', function(){
this.timeout (2000);
this.slow (1000);
it ('watches and emits "ready" event', function (callback) {
fs.readdirSync ('test').forEach (function (fname) { fs.unlinkSync ('test/'+fname); });
fs.writeFileSync ('test.txt', 'double triple quadruple quintuple sextuple septuple octuple');
try {
var test = surveil ('test.txt');
test.on ('ready', function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback();
});
} catch (err) {
callback (err);
}
});
it ('emits one "change" event for a batch of chunk writes', function (callback) {
var writeStream;
try {
var test = surveil ('test.txt');
} catch (err) {
return callback (err);
}
var yip = new yepnope (function (err) {
writeStream.end();
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
var changed = false;
test.on ('change', function (fname) {
if (fname !== undefined)
return yip.nope (new Error ('incorrect filename: '+fname));
if (changed)
return yip.nope (new Error ('repeat event change: '+fname));
changed = true;
yip.yep();
});
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
writeStream = fs.createWriteStream ('test.txt');
var blocks = [
'double',
'triple',
'quadruple',
'quintuple',
'sextuple',
'septuple',
'octuple'
];
function writeToStream(){
var data = blocks.shift();
if (!data)
return;
for (var i=5; i; i--)
data += data;
writeStream.write (data);
setTimeout (writeToStream, 30);
}
writeToStream();
});
});
describe ('remove/add watched file', function(){
var test;
it ('emits "remove" when the watched file is being removed', function (callback) {
test = surveil ('test.txt', { hack_missingPoll:100 });
var yip = new yepnope (function (err) {
try {
test.removeAllListeners();
} catch (listenErr) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
return callback (listenErr);
}
if (err)
return callback (err);
callback()
});
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
test.on ('add', function (fname) { yip.nope (new Error (
'unwanted event add: '+fname
)); });
var removed = false;
test.on ('remove', function (fname) {
removed = true;
yip.yep();
});
setTimeout (function(){
if (removed)
return;
yip.nope (new Error ('did not fire "remove" event'));
}, 500);
test.on ('ready', function (err) {
if (err)
return yip.nope (err);
try {
fs.unlinkSync ('test.txt');
} catch (err) {
yip.nope (err);
}
});
});
it ('emits "add" when the watched file reappears', function (callback) {
var yip = new yepnope (function (err) {
try {
test.close();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);
callback()
});
test.on ('change', function (fname) { yip.nope (new Error (
'unwanted event change: '+fname
)); });
var added = false;
test.on ('add', function (fname) {
added = true;
yip.yep();
});
test.on ('remove', function (fname) { yip.nope (new Error (
'unwanted event remove: '+fname
)); });
try {
fs.writeFileSync ('test.txt', 'foo bar baz');
} catch (err) {
yip.nope (err);
}
setTimeout (function(){
if (added)
return;
yip.nope (new Error ('did not fire "add" event'));
}, 500);
});
});
});
describe ('missing directory', function(){
var test;
it ('does not emit "error" or pass an Error to "ready"', function (callback) {
fs.rmdirSync ('test');
var yip = new yepnope (function (err) {
try {
test.removeAllListeners();
} catch (closeErr) {
return callback (err || closeErr);
}
if (err)
return callback (err);