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() {
    // 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
    });
}

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