input.js

const fs = require("fs");
const path = require("path");
const child_process = require("child_process");

const { bsc_exe: bsc } = require("#cli/bin_path");

const expectedDir = path.join(__dirname, "expected");

const fixtures = fs
  .readdirSync(path.join(__dirname, "fixtures"))
  .filter((fileName) => path.extname(fileName) === ".res");

// const runtime = path.join(__dirname, '..', '..', 'runtime')
const prefix = `${bsc} -w +A -code-action-data`;

const updateTests = process.argv[2] === "update";

function postProcessErrorOutput(output) {
  output = output.trimRight();
  output = output.replace(
    /\/[^ ]+?jscomp\/build_tests\/editor_tooling_enhancements\//g,
    "/.../"
  );
  return output;
}

let doneTasksCount = 0;
let atLeastOneTaskFailed = false;

fixtures.forEach((fileName) => {
  const fullFilePath = path.join(__dirname, "fixtures", fileName);
  const command = `${prefix} -color always ${fullFilePath}`;
  console.log(`running ${command}`);
  child_process.exec(command, (err, stdout, stderr) => {
    doneTasksCount++;
    // careful of:
    // - warning test that actually succeeded in compiling (warning's still in stderr, so the code path is shared here)
    // - accidentally succeeding tests (not likely in this context),
    // actual, correctly erroring test case
    const actualErrorOutput = postProcessErrorOutput(stderr.toString());
    const expectedFilePath = path.join(expectedDir, fileName + ".expected");
    if (updateTests) {
      fs.writeFileSync(expectedFilePath, actualErrorOutput);
    } else {
      const expectedErrorOutput = postProcessErrorOutput(
        fs.readFileSync(expectedFilePath, { encoding: "utf-8" })
      );
      if (expectedErrorOutput !== actualErrorOutput) {
        console.error(
          `The old and new error output for the test ${fullFilePath} aren't the same`
        );
        console.error("\n=== Old:");
        console.error(expectedErrorOutput);
        console.error("\n=== New:");
        console.error(actualErrorOutput);
        atLeastOneTaskFailed = true;
      }

      if (doneTasksCount === fixtures.length && atLeastOneTaskFailed) {
        process.exit(1);
      }
    }
  });
});