rust-analyzer/editors/code/tests/runTests.ts

import * as path from 'path';
import * as fs from 'fs';

import { runTests } from 'vscode-test';

async function main() {
    try {
        // The folder containing the Extension Manifest package.json
        // Passed to `--extensionDevelopmentPath`
        const extensionDevelopmentPath = path.resolve(__dirname, '../../');

        // Minimum supported version.
        const jsonData = fs.readFileSync(path.join(extensionDevelopmentPath, 'package.json'));
        const json = JSON.parse(jsonData.toString());
        let minimalVersion: string = json.engines.vscode;
        if (minimalVersion.startsWith('^')) minimalVersion = minimalVersion.slice(1);

        const launchArgs = ["--disable-extensions"];

        // All test suites (either unit tests or integration tests) should be in subfolders.
        const extensionTestsPath = path.resolve(__dirname, './unit/index');

        // Run tests using the minimal supported version.
        await runTests({
            version: minimalVersion,
            launchArgs,
            extensionDevelopmentPath,
            extensionTestsPath
        });

        // and the latest one
        await runTests({
            version: 'stable',
            launchArgs,
            extensionDevelopmentPath,
            extensionTestsPath
        });

    } catch (err) {
        // eslint-disable-next-line no-console
        console.error('Failed to run tests', err);
        process.exit(1);
    }
}

main();