test-script.ts

#!/usr/bin/env node

const glob = require('glob');
const argv = require('yargs').argv;
const projectArg: string = argv.project;
const spawn = require('child_process').spawn;

// Prints out a message in bold, cyan letters
function printInfoMessage(message: string): void {
  console.info(message);
}

function getArgs(): string {
  let args = '';

  process.argv.forEach(arg => {
    if (arg.startsWith('--') && !arg.startsWith('--project')) {
      args += `${arg} `;
    }
  });

  return args;
}

function createCommand(files?: any[]): string {
  return `jest ${files || ''} --config=jest.config.js ${getArgs()}`;
}

// Handles running the passing in command
function runTestCommand(command: string): void {
  spawn(command, {
    shell: true,
    stdio: 'inherit'
  });
}

function runTestGlob(project: string): void {
  glob(`*/${project}/**/*.spec.ts`, function(err, files) {
    if (files.length > 0) {
      try {
        // we do files.join because jest needs a list of files separated by spaces
        runTestCommand(createCommand(project, files.join(' ')));
      } catch (error) {
        console.error(error);
      }
    }
  });
}

if (projectArg) {
  printInfoMessage(`--project=${projectArg}`);
  runTestGlob(projectArg);
} else {
  printInfoMessage('*** Running tests for all projects ***');

  runTestCommand(createCommand()); // run jest on everything
}