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'use strict';
/**
* Provides a factory function for a {@link StatsCollector} object.
* @module
*/
var constants = require('./runner').constants;
var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
var EVENT_SUITE_BEGIN = constants.EVENT_SUITE_BEGIN;
var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
var EVENT_RUN_END = constants.EVENT_RUN_END;
var EVENT_TEST_END = constants.EVENT_TEST_END;
/**
* Test statistics collector.
*
* @public
* @typedef {Object} StatsCollector
* @property {number} suites - integer count of suites run.
* @property {number} tests - integer count of tests run.
* @property {number} passes - integer count of passing tests.
* @property {number} pending - integer count of pending tests.
* @property {number} failures - integer count of failed tests.
* @property {Date} start - time when testing began.
* @property {Date} end - time when testing concluded.
* @property {number} duration - number of msecs that testing took.
*/
var Date = global.Date;
/**
* Provides stats such as test duration, number of tests passed / failed etc., by listening for events emitted by `runner`.
*
* @private
* @param {Runner} runner - Runner instance
* @throws {TypeError} If falsy `runner`
*/
function createStatsCollector(runner) {
/**
* @type StatsCollector
*/
var stats = {
suites: 0,
tests: 0,
passes: 0,
pending: 0,
failures: 0
};
if (!runner) {
throw new TypeError('Missing runner argument');
}
runner.stats = stats;
runner.once(EVENT_RUN_BEGIN, function() {
stats.start = new Date();
});
runner.on(EVENT_SUITE_BEGIN, function(suite) {
suite.root || stats.suites++;
});
runner.on(EVENT_TEST_PASS, function() {
stats.passes++;
});
runner.on(EVENT_TEST_FAIL, function() {
stats.failures++;
});
runner.on(EVENT_TEST_PENDING, function() {
stats.pending++;
});
runner.on(EVENT_TEST_END, function() {
stats.tests++;
});
runner.once(EVENT_RUN_END, function() {
stats.end = new Date();
stats.duration = stats.end - stats.start;
});
}
module.exports = createStatsCollector;
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