one/dist/esm/package-exports.test.mjs

One is a new React Framework that makes Vite serve both native and web.

import { existsSync, readFileSync } from "node:fs";
import { fileURLToPath, URL } from "node:url";
import { describe, expect, test } from "vitest";
const packageDirectory = fileURLToPath(new URL("../", import.meta.url));
function collectExportTargets(value) {
  if (typeof value === "string") {
    return value.includes("*") ? [] : [value];
  }
  if (!value || typeof value !== "object" || Array.isArray(value)) {
    return [];
  }
  return Object.values(value).flatMap(collectExportTargets);
}
describe("package exports", () => {
  test("all concrete targets exist in the built package", () => {
    const packageJson = JSON.parse(readFileSync(`${packageDirectory}/package.json`, "utf8"));
    if (!packageJson || typeof packageJson !== "object" || !("exports" in packageJson)) {
      throw new Error("one package.json must define exports");
    }
    const missing = collectExportTargets(packageJson.exports).filter(target => !existsSync(`${packageDirectory}/${target}`));
    expect(missing).toEqual([]);
  });
});
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