config-ts.js

import { loadPartialConfigSync } from "../lib/index.js";
import path from "path";
import { fileURLToPath } from "url";
import { createRequire } from "module";
import semver from "semver";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const require = createRequire(import.meta.url);

describe("@babel/core config with ts", () => {
  it("should work with simple .cts", () => {
    const config = loadPartialConfigSync({
      configFile: path.join(
        __dirname,
        "fixtures/config-ts/simple-cts/babel.config.cts",
      ),
    });

    expect(config.options.targets).toMatchInlineSnapshot(`
      Object {
        "node": "12.0.0",
      }
    `);
  });

  it("should throw with invalid .ts register", () => {
    require.extensions[".ts"] = () => {
      throw new Error("Not support .ts.");
    };
    expect(() => {
      loadPartialConfigSync({
        configFile: path.join(
          __dirname,
          "fixtures/config-ts/invalid-cts-register/babel.config.cts",
        ),
      });
    }).toThrow(/Unexpected identifier.*/);
    delete require.extensions[".ts"];
  });

  semver.gte(process.version, "12.0.0")
    ? it
    : it.skip("should work with ts-node", async () => {
        const service = import("ts-node").register({
          experimentalResolver: true,
          compilerOptions: {
            module: "CommonJS",
          },
        });
        service.enabled(true);

        require(path.join(
          __dirname,
          "fixtures/config-ts/simple-cts-with-ts-node/babel.config.cts",
        ));

        const config = loadPartialConfigSync({
          configFile: path.join(
            __dirname,
            "fixtures/config-ts/simple-cts-with-ts-node/babel.config.cts",
          ),
        });

        service.enabled(false);

        expect(config.options.targets).toMatchInlineSnapshot(`
      Object {
        "node": "12.0.0",
      }
    `);
      });
});