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var tty = require("tty")

, readline = require("readline")

, fs = require("fs")

, path = require("path")

, child_process = require("child_process")

, os = require("os")

, mocha = require("mocha")

, Base = mocha.reporters.Base

, color = Base.color

, cursor = Base.cursor

, ms = require("mocha/lib/ms");

var isatty = tty.isatty(1) && tty.isatty(2);

var tapRangePattern = /^(\d+)\.\.(\d+)(?:$|\r\n?|\n)/;

var tapTestPattern = /^(not\sok|ok)\s+(\d+)\s+(?:-\s+)?(.*)$/;

var tapCommentPattern = /^#(?: (tests|pass|fail) (\d+)$)?/;

exports.runTestsInParallel = runTestsInParallel;

exports.ProgressBars = ProgressBars;

function runTestsInParallel(taskConfigsFolder, run, options, cb) {

if (options === undefined) options = { };

return discoverTests(run, options, function (error) {

if (error) {

return cb(error);

}

return runTests(taskConfigsFolder, run, options, cb);

});

}

function discoverTests(run, options, cb) {

console.log("Discovering tests...");

var cmd = "mocha -R " + require.resolve("./mocha-none-reporter.js") + " " + run;

var p = spawnProcess(cmd);

p.on("exit", function (status) {

if (status) {

cb(new Error("Process exited with code " + status));

}

else {

cb();

}

});

}

function runTests(taskConfigsFolder, run, options, cb) {

var configFiles = fs.readdirSync(taskConfigsFolder);

var numPartitions = configFiles.length;

if (numPartitions <= 0) {

cb();

return;

}

console.log("Running tests on " + numPartitions + " threads...");

var partitions = Array(numPartitions);

var progressBars = new ProgressBars();

progressBars.enable();

var counter = numPartitions;

configFiles.forEach(runTestsInPartition);

function runTestsInPartition(file, index) {

var partition = {

file: path.join(taskConfigsFolder, file),

tests: 0,

passed: 0,

failed: 0,

completed: 0,

current: undefined,

start: undefined,

end: undefined,

failures: []

};

partitions[index] = partition;

// Set up the progress bar.

updateProgress(0);

// Start the background process.

var cmd = "mocha -t " + (options.testTimeout || 20000) + " -R tap --no-colors " + run + " --config='" + partition.file + "'";

var p = spawnProcess(cmd);

var rl = readline.createInterface({

input: p.stdout,

terminal: false

});

rl.on("line", onmessage);

p.on("exit", onexit)

function onmessage(line) {

if (partition.start === undefined) {

partition.start = Date.now();

}

var rangeMatch = tapRangePattern.exec(line);

if (rangeMatch) {

partition.tests = parseInt(rangeMatch[2]);

return;

}

var testMatch = tapTestPattern.exec(line);

if (testMatch) {

var test = {

result: testMatch[1],

id: parseInt(testMatch[2]),

name: testMatch[3],

output: []

};

partition.current = test;

partition.completed++;

if (test.result === "ok") {

partition.passed++;

}

else {

partition.failed++;

partition.failures.push(test);

}

var progress = partition.completed / partition.tests;

if (progress < 1) {

updateProgress(progress);

}

return;

}

var commentMatch = tapCommentPattern.exec(line);

if (commentMatch) {

switch (commentMatch[1]) {

case "tests":

partition.current = undefined;

partition.tests = parseInt(commentMatch[2]);

break;

case "pass":

partition.passed = parseInt(commentMatch[2]);

break;

case "fail":

partition.failed = parseInt(commentMatch[2]);

break;

}

return;

}

if (partition.current) {

partition.current.output.push(line);

}

function onexit() {

if (partition.end === undefined) {

partition.end = Date.now();

}

partition.duration = partition.end - partition.start;

var summaryColor = partition.failed ? "fail" : "green";

var summarySymbol = partition.failed ? Base.symbols.err : Base.symbols.ok;

var summaryTests = (partition.passed === partition.tests ? partition.passed : partition.passed + "/" + partition.tests) + " passing";

var summaryDuration = "(" + ms(partition.duration) + ")";

var savedUseColors = Base.useColors;

Base.useColors = !options.noColors;

var summary = color(summaryColor, summarySymbol + " " + summaryTests) + " " + color("light", summaryDuration);

Base.useColors = savedUseColors;

updateProgress(1, summary);

signal();

}

function updateProgress(percentComplete, title) {

var progressColor = "pending";

if (partition.failed) {

progressColor = "fail";

}

progressBars.update(

index,

percentComplete,

progressColor,

title

);

}

function signal() {

counter--;

if (counter <= 0) {

var reporter = new Base(),

stats = reporter.stats,

failures = reporter.failures;

var duration = 0;

for (var i = 0; i < numPartitions; i++) {

var partition = partitions[i];

stats.passes += partition.passed;

stats.failures += partition.failed;

stats.tests += partition.tests;

duration += partition.duration;

for (var j = 0; j < partition.failures.length; j++) {

var failure = partition.failures[j];

failures.push(makeMochaTest(failure));

}

stats.duration = duration;

progressBars.disable();

if (options.noColors) {

var savedUseColors = Base.useColors;

Base.useColors = false;

reporter.epilogue();

Base.useColors = savedUseColors;

}

else {

reporter.epilogue();

}

if (stats.failures) {

return cb(new Error("Test failures reported: " + stats.failures));

}

else {

return cb();

}

function makeMochaTest(test) {

return {

fullTitle: function() {

return test.name;

err: {

message: test.output[0],

stack: test.output.join(os.EOL)

}

};

}

var nodeModulesPathPrefix = path.resolve("./node_modules/.bin/") + path.delimiter;

if (process.env.path !== undefined) {

process.env.path = nodeModulesPathPrefix + process.env.path;

} else if (process.env.PATH !== undefined) {

process.env.PATH = nodeModulesPathPrefix + process.env.PATH;

}

function spawnProcess(cmd, options) {

var shell = process.platform === "win32" ? "cmd" : "/bin/sh";

var prefix = process.platform === "win32" ? "/c" : "-c";

return child_process.spawn(shell, [prefix, cmd], { windowsVerbatimArguments: true });

}

function ProgressBars(options) {

if (!options) options = {};

var open = options.open || '[';

var close = options.close || ']';

var complete = options.complete || '▬';

var incomplete = options.incomplete || Base.symbols.dot;

var maxWidth = Math.floor(Base.window.width * .30) - open.length - close.length - 2;

var width = minMax(options.width || maxWidth, 10, maxWidth);

this._options = {

open: open,

complete: complete,

incomplete: incomplete,

close: close,

width: width

};

this._progressBars = [];

this._lineCount = 0;

this._enabled = false;

}

ProgressBars.prototype = {

enable: function () {

if (!this._enabled) {

process.stdout.write(os.EOL);

this._enabled = true;

}

disable: function () {

if (this._enabled) {

process.stdout.write(os.EOL);

this._enabled = false;

}

update: function (index, percentComplete, color, title) {

percentComplete = minMax(percentComplete, 0, 1);

var progressBar = this._progressBars[index] || (this._progressBars[index] = { });

var width = this._options.width;

var n = Math.floor(width * percentComplete);

var i = width - n;

if (n === progressBar.lastN && title === progressBar.title && color === progressBar.progressColor) {

return;

}

progressBar.lastN = n;

progressBar.title = title;

progressBar.progressColor = color;

var progress = " ";

progress += this._color('progress', this._options.open);

progress += this._color(color, fill(this._options.complete, n));

progress += this._color('progress', fill(this._options.incomplete, i));

progress += this._color('progress', this._options.close);

if (title) {

progress += this._color('progress', ' ' + title);

}

if (progressBar.text !== progress) {

progressBar.text = progress;

this._render(index);

}

_render: function (index) {

if (!this._enabled || !isatty) {

return;

}

cursor.hide();

readline.moveCursor(process.stdout, -process.stdout.columns, -this._lineCount);

var lineCount = 0;

var numProgressBars = this._progressBars.length;

for (var i = 0; i < numProgressBars; i++) {

if (i === index) {

readline.clearLine(process.stdout, 1);

process.stdout.write(this._progressBars[i].text + os.EOL);

}

else {

readline.moveCursor(process.stdout, -process.stdout.columns, +1);

}

lineCount++;

}

this._lineCount = lineCount;

cursor.show();

_color: function (type, text) {

return type && !this._options.noColors ? color(type, text) : text;

}

};

function fill(ch, size) {

var s = "";

while (s.length < size) {

s += ch;

}

return s.length > size ? s.substr(0, size) : s;

}

function minMax(value, min, max) {

if (value < min) return min;

if (value > max) return max;

return value;

}