Working directory and environment variables

[tomitrescak]

Adds support to specify working directory where tests are executed. This is helpful when multiple tests are executed in different parts of the projects (e.g. in monorepos)

Also, it solves the problem where environment variables from the action are not included in the command execution and only subset specified in the action was passed.

  const processEnv = {
    ...process.env,
    ...env,
  }

  execSync(setupCommand, {timeout, cwd: workingDirectory, env: processEnv, stdio: 'inherit'})