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test.js
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test.js
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var sqlite3 = require("sqlite3"),
_ = require("underscore"),
slide = require("slide"),
fs = require("fs"),
util = require('util'),
events = require('events');
var TransactionDatabase = require("./sqlite3-transactions").TransactionDatabase;
var db;
var TEST_LENGTH = 20000;
function Runner (fn) {
this.timer = null;
this.fn = fn;
events.EventEmitter.call(this);
}
util.inherits(Runner, events.EventEmitter);
Runner.prototype.start = function(interval) {
var self = this;
self.stop();
function check() {
self.fn(function(err) {
if (err)
self.emit("error", err);
else
self.emit("success");
if (!_.isNull(self.timer)) // if timer hasn't been stopped during fn() or during error handler
self.timer = setTimeout(check, interval);
});
}
self.timer = setTimeout(check, 1);
};
Runner.prototype.stop = function() {
if (this.timer) {
clearTimeout(this.timer);
this.timer = null;
}
};
function init(callback) {
var self = this;
var file = "./test.sqlite3";
db = new TransactionDatabase(
new sqlite3.Database(
file,
sqlite3.OPEN_READWRITE | sqlite3.OPEN_CREATE,
function(err) {
if (err) return callback(err);
initDatabase(callback);
}
)
);
}
function initDatabase(callback) {
db.exec(
"CREATE TABLE IF NOT EXISTS data (" +
"id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"t TEXT NOT NULL" +
");" +
"DELETE FROM data;",
callback
);
}
function insertData1(callback) {
// start a transaction
//console.log('==beginTransaction');
db.beginTransaction(function(err, tr) {
//console.log(' beginTransaction done', err);
// do multiple inserts
slide.asyncMap(
['all', 'your', 'base', 'are', 'belong', 'to', 'us'],
function(item, cb) {
//console.log(" "+item);
tr.run("INSERT INTO data (t) VALUES (?)", item, cb);
},
function(err) {
// all done - now erase it all
//console.log("==rollback");
tr.rollback(function(e) {
//console.log("==rollback done");
callback(e);
});
}
);
});
}
function insertData2(callback) {
// start a transaction
//console.log('==beginTransaction');
db.beginTransaction(function(err, tr) {
var data = ['all', 'your', 'base', 'are', 'belong', 'to', 'us'];
for (var i=0; i<data.length; ++i)
tr.run("INSERT INTO data (t) VALUES (?)", data[i]);
tr.rollback(function(e) {
//console.log("==rollback done");
callback(e);
});
});
}
var integer = 0;
function insertInteger(callback) {
//console.log('INT ', integer);
db.exec("INSERT INTO data (t) VALUES ('"+(integer++)+"')", function(err) {
//console.log('INT done', integer);
callback(err);
});
}
function insertIntegerStatement(callback) {
//console.log("INT", integer);
var statement = db.prepare("INSERT INTO data (t) VALUES (?)");
statement.bind(integer++);
statement.run(function(err) {
//console.log("INT done", integer-1);
callback(err);
});
}
function insertIntegerTransaction(callback) {
//console.log('INT ', integer);
db.beginTransaction(function(err, tr) {
tr.exec("INSERT INTO data (t) VALUES ('"+(integer++)+"')", function(err) {
if (err) return console.log(err);
tr.commit(function(err) {
//console.log('INT done', integer);
callback(err);
});
});
});
}
function checkConsistent(callback) {
var self = this;
db.all("SELECT * FROM data WHERE t-1 NOT IN (SELECT t FROM data)", function(err, rows) {
var msg = "";
for (var i=1; i<rows.length; ++i) { // skip first record - 0 has no predecessor
var missingValue = rows[i].t-1;
if (_.isNaN(missingValue))
msg += "Not consistent - That shouldn't be here " + rows[i].t + "\n";
else
msg += "Not consistent - Missing "+missingValue + "\n";
}
if (rows.length>1)
callback(new Error(msg));
else
callback(null);
});
}
function test1(insertFn, integerFn, callback) {
// Insert data in transaction and roll'em'back every 10ms
var insertRunner = new Runner(insertFn);
insertRunner.on("error", function(err) {
console.log("insert error", err);
process.exit(1);
});
insertRunner.start(10);
// Insert increasing integers 0,1... every 9ms
var integerRunner = new Runner(integerFn);
insertRunner.on("error", function(err) {
console.log("integer insert error", err);
process.exit(1);
});
integerRunner.start(9);
// Check if DB is consistent every 1s
var consistentRunner = new Runner(checkConsistent);
consistentRunner.on('error', function(err) {
console.log(err);
process.exit(1);
});
var checkNum = 0;
consistentRunner.on('success', function() {
console.log("Consistent", ++checkNum, "integer="+integer);
});
consistentRunner.start(1000);
// do this stuff for 20s and then stop it
setTimeout(function() {
insertRunner.stop();
integerRunner.stop();
consistentRunner.stop();
setTimeout(function() {
db.close(callback);
}, 500);
}, TEST_LENGTH);
}
var tests = {
'waiting for all queries in a transaction': _.partial(test1, insertData2, insertInteger),
'concurency of transaction and queries': _.partial(test1, insertData1, insertInteger),
'concurency of two transactions': _.partial(test1, insertData1, insertIntegerTransaction),
'statement': _.partial(test1, insertData1, insertIntegerStatement),
};
var testsArray = [];
for(var iterKey in tests) {
testsArray.push((function(key) {
return function(cb) {
init(function() {
tests[key](function(err) {
if (err)
console.log("Test", key, "ERROR", err);
else
console.log("Test", key, "DONE");
cb(err);
});
});
};
})(iterKey));
}
slide.chain(
testsArray,
function(e) {
if (e) return console.log(e);
console.log("ALL TESTS DONE");
}
);