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106 lines
2.1 KiB
106 lines
2.1 KiB
'use strict';
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const utils = require('../utils');
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const Context = require('../context');
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const Mocha = require('../mocha');
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const collectFiles = require('./collect-files');
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/**
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* Exports the `watchRun` function that runs mocha in "watch" mode.
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* @see module:lib/cli/run-helpers
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* @module
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* @private
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*/
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/**
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* Run Mocha in "watch" mode
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* @param {Mocha} mocha - Mocha instance
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* @param {Object} opts - Options
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* @param {string} opts.ui - User interface
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* @param {Object} fileCollectParams - Parameters that control test
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* file collection. See `lib/cli/collect-files.js`.
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* @param {string[]} fileCollectParams.extension - List of extensions to watch
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* @private
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*/
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module.exports = (mocha, {ui}, fileCollectParams) => {
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let runner;
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const files = collectFiles(fileCollectParams);
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console.log();
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hideCursor();
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process.on('SIGINT', () => {
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showCursor();
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console.log('\n');
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// By UNIX/Posix convention this indicates that the process was
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// killed by SIGINT which has portable number 2.
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process.exit(128 + 2);
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});
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const watchFiles = utils.files(process.cwd(), fileCollectParams.extension);
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let runAgain = false;
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const loadAndRun = () => {
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try {
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mocha.files = files;
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runAgain = false;
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runner = mocha.run(() => {
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runner = null;
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if (runAgain) {
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rerun();
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}
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});
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} catch (e) {
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console.log(e.stack);
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}
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};
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const purge = () => {
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watchFiles.forEach(Mocha.unloadFile);
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};
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loadAndRun();
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const rerun = () => {
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purge();
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eraseLine();
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mocha.suite = mocha.suite.clone();
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mocha.suite.ctx = new Context();
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mocha.ui(ui);
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loadAndRun();
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};
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utils.watch(watchFiles, () => {
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runAgain = true;
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if (runner) {
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runner.abort();
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} else {
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rerun();
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}
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});
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};
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/**
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* Hide the cursor.
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* @ignore
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* @private
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*/
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const hideCursor = () => {
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process.stdout.write('\u001b[?25l');
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};
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/**
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* Show the cursor.
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* @ignore
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* @private
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*/
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const showCursor = () => {
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process.stdout.write('\u001b[?25h');
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};
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/**
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* Erases the line on stdout
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* @private
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*/
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const eraseLine = () => {
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process.stdout.write('\u001b[2K');
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};
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