// 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;
   }
 }
 
 // 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();

   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);