895 lines
20 KiB
JavaScript
895 lines
20 KiB
JavaScript
/**
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* Module dependencies.
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*/
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var EventEmitter = require('events').EventEmitter;
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var Pending = require('./pending');
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var utils = require('./utils');
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var inherits = utils.inherits;
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var debug = require('debug')('mocha:runner');
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var Runnable = require('./runnable');
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var filter = utils.filter;
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var indexOf = utils.indexOf;
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var keys = utils.keys;
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var stackFilter = utils.stackTraceFilter();
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var stringify = utils.stringify;
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var type = utils.type;
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var undefinedError = utils.undefinedError;
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var isArray = utils.isArray;
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/**
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* Non-enumerable globals.
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*/
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var globals = [
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'setTimeout',
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'clearTimeout',
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'setInterval',
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'clearInterval',
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'XMLHttpRequest',
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'Date',
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'setImmediate',
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'clearImmediate'
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];
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/**
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* Expose `Runner`.
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*/
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module.exports = Runner;
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/**
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* Initialize a `Runner` for the given `suite`.
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*
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* Events:
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*
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* - `start` execution started
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* - `end` execution complete
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* - `suite` (suite) test suite execution started
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* - `suite end` (suite) all tests (and sub-suites) have finished
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* - `test` (test) test execution started
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* - `test end` (test) test completed
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* - `hook` (hook) hook execution started
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* - `hook end` (hook) hook complete
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* - `pass` (test) test passed
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* - `fail` (test, err) test failed
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* - `pending` (test) test pending
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*
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* @api public
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* @param {Suite} suite Root suite
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* @param {boolean} [delay] Whether or not to delay execution of root suite
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* until ready.
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*/
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function Runner(suite, delay) {
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var self = this;
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this._globals = [];
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this._abort = false;
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this._delay = delay;
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this.suite = suite;
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this.started = false;
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this.total = suite.total();
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this.failures = 0;
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this.on('test end', function(test) {
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self.checkGlobals(test);
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});
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this.on('hook end', function(hook) {
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self.checkGlobals(hook);
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});
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this._defaultGrep = /.*/;
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this.grep(this._defaultGrep);
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this.globals(this.globalProps().concat(extraGlobals()));
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}
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/**
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* Wrapper for setImmediate, process.nextTick, or browser polyfill.
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*
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* @param {Function} fn
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* @api private
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*/
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Runner.immediately = global.setImmediate || process.nextTick;
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/**
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* Inherit from `EventEmitter.prototype`.
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*/
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inherits(Runner, EventEmitter);
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/**
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* Run tests with full titles matching `re`. Updates runner.total
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* with number of tests matched.
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*
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* @param {RegExp} re
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* @param {Boolean} invert
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* @return {Runner} for chaining
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* @api public
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* @param {RegExp} re
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* @param {boolean} invert
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* @return {Runner} Runner instance.
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*/
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Runner.prototype.grep = function(re, invert) {
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debug('grep %s', re);
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this._grep = re;
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this._invert = invert;
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this.total = this.grepTotal(this.suite);
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return this;
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};
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/**
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* Returns the number of tests matching the grep search for the
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* given suite.
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*
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* @param {Suite} suite
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* @return {Number}
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* @api public
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* @param {Suite} suite
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* @return {number}
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*/
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Runner.prototype.grepTotal = function(suite) {
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var self = this;
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var total = 0;
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suite.eachTest(function(test) {
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var match = self._grep.test(test.fullTitle());
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if (self._invert) {
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match = !match;
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}
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if (match) {
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total++;
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}
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});
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return total;
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};
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/**
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* Return a list of global properties.
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*
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* @return {Array}
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* @api private
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*/
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Runner.prototype.globalProps = function() {
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var props = keys(global);
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// non-enumerables
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for (var i = 0; i < globals.length; ++i) {
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if (~indexOf(props, globals[i])) {
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continue;
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}
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props.push(globals[i]);
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}
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return props;
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};
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/**
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* Allow the given `arr` of globals.
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*
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* @param {Array} arr
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* @return {Runner} for chaining
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* @api public
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* @param {Array} arr
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* @return {Runner} Runner instance.
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*/
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Runner.prototype.globals = function(arr) {
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if (!arguments.length) {
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return this._globals;
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}
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debug('globals %j', arr);
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this._globals = this._globals.concat(arr);
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return this;
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};
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/**
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* Check for global variable leaks.
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*
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* @api private
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*/
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Runner.prototype.checkGlobals = function(test) {
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if (this.ignoreLeaks) {
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return;
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}
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var ok = this._globals;
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var globals = this.globalProps();
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var leaks;
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if (test) {
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ok = ok.concat(test._allowedGlobals || []);
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}
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if (this.prevGlobalsLength === globals.length) {
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return;
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}
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this.prevGlobalsLength = globals.length;
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leaks = filterLeaks(ok, globals);
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this._globals = this._globals.concat(leaks);
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if (leaks.length > 1) {
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this.fail(test, new Error('global leaks detected: ' + leaks.join(', ') + ''));
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} else if (leaks.length) {
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this.fail(test, new Error('global leak detected: ' + leaks[0]));
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}
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};
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/**
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* Fail the given `test`.
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*
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* @api private
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* @param {Test} test
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* @param {Error} err
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*/
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Runner.prototype.fail = function(test, err) {
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++this.failures;
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test.state = 'failed';
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if (!(err instanceof Error || err && typeof err.message === 'string')) {
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err = new Error('the ' + type(err) + ' ' + stringify(err) + ' was thrown, throw an Error :)');
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}
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err.stack = (this.fullStackTrace || !err.stack)
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? err.stack
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: stackFilter(err.stack);
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this.emit('fail', test, err);
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};
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/**
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* Fail the given `hook` with `err`.
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*
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* Hook failures work in the following pattern:
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* - If bail, then exit
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* - Failed `before` hook skips all tests in a suite and subsuites,
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* but jumps to corresponding `after` hook
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* - Failed `before each` hook skips remaining tests in a
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* suite and jumps to corresponding `after each` hook,
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* which is run only once
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* - Failed `after` hook does not alter
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* execution order
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* - Failed `after each` hook skips remaining tests in a
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* suite and subsuites, but executes other `after each`
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* hooks
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*
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* @api private
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* @param {Hook} hook
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* @param {Error} err
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*/
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Runner.prototype.failHook = function(hook, err) {
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if (hook.ctx && hook.ctx.currentTest) {
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hook.originalTitle = hook.originalTitle || hook.title;
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hook.title = hook.originalTitle + ' for "' + hook.ctx.currentTest.title + '"';
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}
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this.fail(hook, err);
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if (this.suite.bail()) {
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this.emit('end');
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}
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};
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/**
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* Run hook `name` callbacks and then invoke `fn()`.
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*
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* @api private
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* @param {string} name
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* @param {Function} fn
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*/
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Runner.prototype.hook = function(name, fn) {
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var suite = this.suite;
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var hooks = suite['_' + name];
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var self = this;
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function next(i) {
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var hook = hooks[i];
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if (!hook) {
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return fn();
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}
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self.currentRunnable = hook;
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hook.ctx.currentTest = self.test;
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self.emit('hook', hook);
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if (!hook.listeners('error').length) {
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hook.on('error', function(err) {
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self.failHook(hook, err);
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});
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}
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hook.run(function(err) {
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var testError = hook.error();
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if (testError) {
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self.fail(self.test, testError);
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}
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if (err) {
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if (err instanceof Pending) {
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suite.pending = true;
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} else {
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self.failHook(hook, err);
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// stop executing hooks, notify callee of hook err
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return fn(err);
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}
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}
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self.emit('hook end', hook);
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delete hook.ctx.currentTest;
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next(++i);
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});
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}
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Runner.immediately(function() {
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next(0);
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});
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};
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/**
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* Run hook `name` for the given array of `suites`
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* in order, and callback `fn(err, errSuite)`.
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*
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* @api private
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* @param {string} name
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* @param {Array} suites
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* @param {Function} fn
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*/
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Runner.prototype.hooks = function(name, suites, fn) {
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var self = this;
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var orig = this.suite;
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function next(suite) {
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self.suite = suite;
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if (!suite) {
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self.suite = orig;
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return fn();
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}
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self.hook(name, function(err) {
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if (err) {
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var errSuite = self.suite;
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self.suite = orig;
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return fn(err, errSuite);
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}
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next(suites.pop());
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});
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}
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next(suites.pop());
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};
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/**
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* Run hooks from the top level down.
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*
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* @param {String} name
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* @param {Function} fn
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* @api private
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*/
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Runner.prototype.hookUp = function(name, fn) {
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var suites = [this.suite].concat(this.parents()).reverse();
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this.hooks(name, suites, fn);
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};
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/**
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* Run hooks from the bottom up.
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*
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* @param {String} name
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* @param {Function} fn
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* @api private
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*/
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Runner.prototype.hookDown = function(name, fn) {
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var suites = [this.suite].concat(this.parents());
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this.hooks(name, suites, fn);
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};
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/**
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* Return an array of parent Suites from
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* closest to furthest.
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*
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* @return {Array}
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* @api private
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*/
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Runner.prototype.parents = function() {
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var suite = this.suite;
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var suites = [];
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while (suite.parent) {
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suite = suite.parent;
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suites.push(suite);
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}
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return suites;
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};
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/**
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* Run the current test and callback `fn(err)`.
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*
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* @param {Function} fn
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* @api private
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*/
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Runner.prototype.runTest = function(fn) {
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var self = this;
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var test = this.test;
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if (this.asyncOnly) {
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test.asyncOnly = true;
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}
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if (this.allowUncaught) {
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test.allowUncaught = true;
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return test.run(fn);
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}
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try {
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test.on('error', function(err) {
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self.fail(test, err);
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});
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test.run(fn);
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} catch (err) {
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fn(err);
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}
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};
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/**
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* Run tests in the given `suite` and invoke the callback `fn()` when complete.
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*
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* @api private
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* @param {Suite} suite
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* @param {Function} fn
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*/
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Runner.prototype.runTests = function(suite, fn) {
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var self = this;
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var tests = suite.tests.slice();
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var test;
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function hookErr(_, errSuite, after) {
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// before/after Each hook for errSuite failed:
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var orig = self.suite;
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// for failed 'after each' hook start from errSuite parent,
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// otherwise start from errSuite itself
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self.suite = after ? errSuite.parent : errSuite;
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if (self.suite) {
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// call hookUp afterEach
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self.hookUp('afterEach', function(err2, errSuite2) {
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self.suite = orig;
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// some hooks may fail even now
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if (err2) {
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return hookErr(err2, errSuite2, true);
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}
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// report error suite
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fn(errSuite);
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});
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} else {
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// there is no need calling other 'after each' hooks
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self.suite = orig;
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fn(errSuite);
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}
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}
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function next(err, errSuite) {
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// if we bail after first err
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if (self.failures && suite._bail) {
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return fn();
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}
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if (self._abort) {
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return fn();
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}
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if (err) {
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return hookErr(err, errSuite, true);
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}
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// next test
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test = tests.shift();
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// all done
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if (!test) {
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return fn();
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}
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// grep
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var match = self._grep.test(test.fullTitle());
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if (self._invert) {
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match = !match;
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}
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if (!match) {
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// Run immediately only if we have defined a grep. When we
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// define a grep — It can cause maximum callstack error if
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// the grep is doing a large recursive loop by neglecting
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// all tests. The run immediately function also comes with
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// a performance cost. So we don't want to run immediately
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// if we run the whole test suite, because running the whole
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// test suite don't do any immediate recursive loops. Thus,
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// allowing a JS runtime to breathe.
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if (self._grep !== self._defaultGrep) {
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Runner.immediately(next);
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} else {
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next();
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}
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return;
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}
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|
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if (test.isPending()) {
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self.emit('pending', test);
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|
self.emit('test end', test);
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return next();
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}
|
|
|
|
// execute test and hook(s)
|
|
self.emit('test', self.test = test);
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|
self.hookDown('beforeEach', function(err, errSuite) {
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|
if (suite.isPending()) {
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|
self.emit('pending', test);
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|
self.emit('test end', test);
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return next();
|
|
}
|
|
if (err) {
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|
return hookErr(err, errSuite, false);
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|
}
|
|
self.currentRunnable = self.test;
|
|
self.runTest(function(err) {
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|
test = self.test;
|
|
if (err) {
|
|
var retry = test.currentRetry();
|
|
if (err instanceof Pending) {
|
|
test.pending = true;
|
|
self.emit('pending', test);
|
|
} else if (retry < test.retries()) {
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|
var clonedTest = test.clone();
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|
clonedTest.currentRetry(retry + 1);
|
|
tests.unshift(clonedTest);
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|
|
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// Early return + hook trigger so that it doesn't
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// increment the count wrong
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|
return self.hookUp('afterEach', next);
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} else {
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self.fail(test, err);
|
|
}
|
|
self.emit('test end', test);
|
|
|
|
if (err instanceof Pending) {
|
|
return next();
|
|
}
|
|
|
|
return self.hookUp('afterEach', next);
|
|
}
|
|
|
|
test.state = 'passed';
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|
self.emit('pass', test);
|
|
self.emit('test end', test);
|
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self.hookUp('afterEach', next);
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});
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});
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}
|
|
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this.next = next;
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this.hookErr = hookErr;
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next();
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};
|
|
|
|
/**
|
|
* Run the given `suite` and invoke the callback `fn()` when complete.
|
|
*
|
|
* @api private
|
|
* @param {Suite} suite
|
|
* @param {Function} fn
|
|
*/
|
|
Runner.prototype.runSuite = function(suite, fn) {
|
|
var i = 0;
|
|
var self = this;
|
|
var total = this.grepTotal(suite);
|
|
var afterAllHookCalled = false;
|
|
|
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debug('run suite %s', suite.fullTitle());
|
|
|
|
if (!total || (self.failures && suite._bail)) {
|
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return fn();
|
|
}
|
|
|
|
this.emit('suite', this.suite = suite);
|
|
|
|
function next(errSuite) {
|
|
if (errSuite) {
|
|
// current suite failed on a hook from errSuite
|
|
if (errSuite === suite) {
|
|
// if errSuite is current suite
|
|
// continue to the next sibling suite
|
|
return done();
|
|
}
|
|
// errSuite is among the parents of current suite
|
|
// stop execution of errSuite and all sub-suites
|
|
return done(errSuite);
|
|
}
|
|
|
|
if (self._abort) {
|
|
return done();
|
|
}
|
|
|
|
var curr = suite.suites[i++];
|
|
if (!curr) {
|
|
return done();
|
|
}
|
|
|
|
// Avoid grep neglecting large number of tests causing a
|
|
// huge recursive loop and thus a maximum call stack error.
|
|
// See comment in `this.runTests()` for more information.
|
|
if (self._grep !== self._defaultGrep) {
|
|
Runner.immediately(function() {
|
|
self.runSuite(curr, next);
|
|
});
|
|
} else {
|
|
self.runSuite(curr, next);
|
|
}
|
|
}
|
|
|
|
function done(errSuite) {
|
|
self.suite = suite;
|
|
self.nextSuite = next;
|
|
|
|
if (afterAllHookCalled) {
|
|
fn(errSuite);
|
|
} else {
|
|
// mark that the afterAll block has been called once
|
|
// and so can be skipped if there is an error in it.
|
|
afterAllHookCalled = true;
|
|
|
|
// remove reference to test
|
|
delete self.test;
|
|
|
|
self.hook('afterAll', function() {
|
|
self.emit('suite end', suite);
|
|
fn(errSuite);
|
|
});
|
|
}
|
|
}
|
|
|
|
this.nextSuite = next;
|
|
|
|
this.hook('beforeAll', function(err) {
|
|
if (err) {
|
|
return done();
|
|
}
|
|
self.runTests(suite, next);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Handle uncaught exceptions.
|
|
*
|
|
* @param {Error} err
|
|
* @api private
|
|
*/
|
|
Runner.prototype.uncaught = function(err) {
|
|
if (err) {
|
|
debug('uncaught exception %s', err !== function() {
|
|
return this;
|
|
}.call(err) ? err : (err.message || err));
|
|
} else {
|
|
debug('uncaught undefined exception');
|
|
err = undefinedError();
|
|
}
|
|
err.uncaught = true;
|
|
|
|
var runnable = this.currentRunnable;
|
|
|
|
if (!runnable) {
|
|
runnable = new Runnable('Uncaught error outside test suite');
|
|
runnable.parent = this.suite;
|
|
|
|
if (this.started) {
|
|
this.fail(runnable, err);
|
|
} else {
|
|
// Can't recover from this failure
|
|
this.emit('start');
|
|
this.fail(runnable, err);
|
|
this.emit('end');
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
runnable.clearTimeout();
|
|
|
|
// Ignore errors if complete
|
|
if (runnable.state) {
|
|
return;
|
|
}
|
|
this.fail(runnable, err);
|
|
|
|
// recover from test
|
|
if (runnable.type === 'test') {
|
|
this.emit('test end', runnable);
|
|
this.hookUp('afterEach', this.next);
|
|
return;
|
|
}
|
|
|
|
// recover from hooks
|
|
if (runnable.type === 'hook') {
|
|
var errSuite = this.suite;
|
|
// if hook failure is in afterEach block
|
|
if (runnable.fullTitle().indexOf('after each') > -1) {
|
|
return this.hookErr(err, errSuite, true);
|
|
}
|
|
// if hook failure is in beforeEach block
|
|
if (runnable.fullTitle().indexOf('before each') > -1) {
|
|
return this.hookErr(err, errSuite, false);
|
|
}
|
|
// if hook failure is in after or before blocks
|
|
return this.nextSuite(errSuite);
|
|
}
|
|
|
|
// bail
|
|
this.emit('end');
|
|
};
|
|
|
|
/**
|
|
* Cleans up the references to all the deferred functions
|
|
* (before/after/beforeEach/afterEach) and tests of a Suite.
|
|
* These must be deleted otherwise a memory leak can happen,
|
|
* as those functions may reference variables from closures,
|
|
* thus those variables can never be garbage collected as long
|
|
* as the deferred functions exist.
|
|
*
|
|
* @param {Suite} suite
|
|
*/
|
|
function cleanSuiteReferences(suite) {
|
|
function cleanArrReferences(arr) {
|
|
for (var i = 0; i < arr.length; i++) {
|
|
delete arr[i].fn;
|
|
}
|
|
}
|
|
|
|
if (isArray(suite._beforeAll)) {
|
|
cleanArrReferences(suite._beforeAll);
|
|
}
|
|
|
|
if (isArray(suite._beforeEach)) {
|
|
cleanArrReferences(suite._beforeEach);
|
|
}
|
|
|
|
if (isArray(suite._afterAll)) {
|
|
cleanArrReferences(suite._afterAll);
|
|
}
|
|
|
|
if (isArray(suite._afterEach)) {
|
|
cleanArrReferences(suite._afterEach);
|
|
}
|
|
|
|
for (var i = 0; i < suite.tests.length; i++) {
|
|
delete suite.tests[i].fn;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Run the root suite and invoke `fn(failures)`
|
|
* on completion.
|
|
*
|
|
* @param {Function} fn
|
|
* @return {Runner} for chaining
|
|
* @api public
|
|
* @param {Function} fn
|
|
* @return {Runner} Runner instance.
|
|
*/
|
|
Runner.prototype.run = function(fn) {
|
|
var self = this;
|
|
var rootSuite = this.suite;
|
|
|
|
fn = fn || function() {};
|
|
|
|
function uncaught(err) {
|
|
self.uncaught(err);
|
|
}
|
|
|
|
function start() {
|
|
self.started = true;
|
|
self.emit('start');
|
|
self.runSuite(rootSuite, function() {
|
|
debug('finished running');
|
|
self.emit('end');
|
|
});
|
|
}
|
|
|
|
debug('start');
|
|
|
|
// references cleanup to avoid memory leaks
|
|
this.on('suite end', cleanSuiteReferences);
|
|
|
|
// callback
|
|
this.on('end', function() {
|
|
debug('end');
|
|
process.removeListener('uncaughtException', uncaught);
|
|
fn(self.failures);
|
|
});
|
|
|
|
// uncaught exception
|
|
process.on('uncaughtException', uncaught);
|
|
|
|
if (this._delay) {
|
|
// for reporters, I guess.
|
|
// might be nice to debounce some dots while we wait.
|
|
this.emit('waiting', rootSuite);
|
|
rootSuite.once('run', start);
|
|
} else {
|
|
start();
|
|
}
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Cleanly abort execution.
|
|
*
|
|
* @api public
|
|
* @return {Runner} Runner instance.
|
|
*/
|
|
Runner.prototype.abort = function() {
|
|
debug('aborting');
|
|
this._abort = true;
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Filter leaks with the given globals flagged as `ok`.
|
|
*
|
|
* @api private
|
|
* @param {Array} ok
|
|
* @param {Array} globals
|
|
* @return {Array}
|
|
*/
|
|
function filterLeaks(ok, globals) {
|
|
return filter(globals, function(key) {
|
|
// Firefox and Chrome exposes iframes as index inside the window object
|
|
if (/^d+/.test(key)) {
|
|
return false;
|
|
}
|
|
|
|
// in firefox
|
|
// if runner runs in an iframe, this iframe's window.getInterface method not init at first
|
|
// it is assigned in some seconds
|
|
if (global.navigator && (/^getInterface/).test(key)) {
|
|
return false;
|
|
}
|
|
|
|
// an iframe could be approached by window[iframeIndex]
|
|
// in ie6,7,8 and opera, iframeIndex is enumerable, this could cause leak
|
|
if (global.navigator && (/^\d+/).test(key)) {
|
|
return false;
|
|
}
|
|
|
|
// Opera and IE expose global variables for HTML element IDs (issue #243)
|
|
if (/^mocha-/.test(key)) {
|
|
return false;
|
|
}
|
|
|
|
var matched = filter(ok, function(ok) {
|
|
if (~ok.indexOf('*')) {
|
|
return key.indexOf(ok.split('*')[0]) === 0;
|
|
}
|
|
return key === ok;
|
|
});
|
|
return !matched.length && (!global.navigator || key !== 'onerror');
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Array of globals dependent on the environment.
|
|
*
|
|
* @return {Array}
|
|
* @api private
|
|
*/
|
|
function extraGlobals() {
|
|
if (typeof process === 'object' && typeof process.version === 'string') {
|
|
var parts = process.version.split('.');
|
|
var nodeVersion = utils.reduce(parts, function(a, v) {
|
|
return a << 8 | v;
|
|
});
|
|
|
|
// 'errno' was renamed to process._errno in v0.9.11.
|
|
|
|
if (nodeVersion < 0x00090B) {
|
|
return ['errno'];
|
|
}
|
|
}
|
|
|
|
return [];
|
|
}
|