//
// PLEASE DO NOT MODIFY / DELETE UNLESS YOU KNOW WHAT YOU ARE DOING
//
// This file is providing the test runner to use when running extension tests.
// By default the test runner in use is Mocha based.
//
// You can provide your own test runner if you want to override it by exporting
// a function run(testRoot: string, clb: (error:Error) => void) that the extension
// host can call to run the tests. The test runner is expected to use console.log
// to report the results back to the caller. When the tests are finished, return
// a possible error to the callback or null if none.

import * as glob from 'glob';
import * as Mocha from 'mocha';
import * as path from 'path';

export function run(): Promise<void> {
    // Create the mocha test
    const mocha = new Mocha({
        ui: 'bdd',
    });
    mocha.useColors(true);

    const testsRoot = __dirname;

    return new Promise((c, e) => {
        glob('**/**.test.js', { cwd: testsRoot }, (err, files) => {
            if (err) {
                return e(err);
            }

            // Add files to the test suite
            files.forEach(f => mocha.addFile(path.resolve(testsRoot, f)));

            try {
                // Run the mocha test
                mocha.run(failures => {
                    if (failures > 0) {
                        e(new Error(`${failures} tests failed.`));
                    } else {
                        c();
                    }
                });
            } catch (err) {
                e(err);
            }
        });
    });
}