ReferenceError: TextEncoder is not defined
    > 93 |     const encoder = new TextEncoder();
         |                     ^

module.exports = {
  verbose: true,
  testMatch: ["**/tests/**/*.test.js"],
  testEnvironment: "jsdom",
  globals: {
    TextEncoder: require("util").TextEncoder,　// この記述でグローバル化してあげる必要あり
    TextDecoder: require("util").TextDecoder,
  },
};