How to use babel-helper-fixtures - 4 common examples

fs.readdirSync(fixtureLoc).forEach((testName) => {
    if (testName.slice(0, 1) === ".") return;
    const testLoc = path.join(fixtureLoc, testName);

    const opts = {
      args: ["src", "--out-dir", "lib"],
      testLoc: testLoc,
    };

    const stdoutLoc = path.join(testLoc, "stdout.txt");

    if (fs.existsSync(stdoutLoc)) {
      opts.stdout = helper.readFile(stdoutLoc);
    }

    const optionsLoc = path.join(testLoc, "options.json");

    if (!fs.existsSync(optionsLoc)) {
      throw new Error(`Debug test '${testName}' is missing an options.json file`);
    }

    opts.inFiles = {
      "src/in.js": "",
      ".babelrc": helper.readFile(optionsLoc),
    };

    it(testName, buildTest(opts));
  });
});

const stdoutLoc = path.join(testLoc, "stdout.txt");

    if (fs.existsSync(stdoutLoc)) {
      opts.stdout = helper.readFile(stdoutLoc);
    }

    const optionsLoc = path.join(testLoc, "options.json");

    if (!fs.existsSync(optionsLoc)) {
      throw new Error(`Debug test '${testName}' is missing an options.json file`);
    }

    opts.inFiles = {
      "src/in.js": "",
      ".babelrc": helper.readFile(optionsLoc),
    };

    it(testName, buildTest(opts));
  });
});

export function runThrowTestsWithEstree(fixturesPath, parseFunction) {
  const fixtures = getFixtures(fixturesPath);

  Object.keys(fixtures).forEach(function(name) {
    fixtures[name].forEach(function(testSuite) {
      testSuite.tests.forEach(function(task) {
        if (!task.options.throws) return;

        task.options.plugins = task.options.plugins || [];
        task.options.plugins.push("estree");

        const testFn = task.disabled
          ? test.skip
          : task.options.only ? test.only : test;

        testFn(name + "/" + testSuite.title + "/" + task.title, function(t) {
          try {
            runTest(task, parseFunction);

export function runFixtureTests(fixturesPath, parseFunction) {
  const fixtures = getFixtures(fixturesPath);

  Object.keys(fixtures).forEach(function(name) {
    fixtures[name].forEach(function(testSuite) {
      testSuite.tests.forEach(function(task) {
        const testFn = task.disabled
          ? test.skip
          : task.options.only ? test.only : test;

        testFn(name + "/" + testSuite.title + "/" + task.title, function(t) {
          try {
            runTest(task, parseFunction);
            t.pass();
          } catch (err) {
            const message =
              name + "/" + task.actual.filename + ": " + err.message;
            t.fail(message);