"use strict"

// Do this as the first thing so that any code reading it knows the right env.
process.env.BABEL_ENV = "test"
process.env.NODE_ENV = "test"
process.env.PUBLIC_URL = ""

// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on("unhandledRejection", (err) => {
  throw err
})

// Ensure environment variables are read.
require("../config/env")

const jest = require("jest")
const execSync = require("child_process").execSync
let argv = process.argv.slice(2)

function isInGitRepository() {
  try {
    execSync("git rev-parse --is-inside-work-tree", { stdio: "ignore" })
    return true
  } catch (e) {
    return false
  }
}

function isInMercurialRepository() {
  try {
    execSync("hg --cwd . root", { stdio: "ignore" })
    return true
  } catch (e) {
    return false
  }
}

// Watch unless on CI, in coverage mode, explicitly adding `--no-watch`,
// or explicitly running all tests
if (
  !process.env.CI &&
  argv.indexOf("--coverage") === -1 &&
  argv.indexOf("--no-watch") === -1 &&
  argv.indexOf("--watchAll") === -1
) {
  // https://github.com/facebook/create-react-app/issues/5210
  const hasSourceControl = isInGitRepository() || isInMercurialRepository()
  argv.push(hasSourceControl ? "--watch" : "--watchAll")
}

// Jest doesn't have this option so we'll remove it
if (argv.indexOf("--no-watch") !== -1) {
  argv = argv.filter((arg) => arg !== "--no-watch")
}

jest.run(argv)
