babel/packages/babel-helper-validator-identifier/test/helpers/describe-is-identifier-start-tests.js

// eslint-disable-next-line jest/no-export
export function describeIsIdentifierStartTests(isIdentifierStartImpl) {
  describe("isIdentifierStart", function () {
    it("returns false if provided codepoint is NaN", function () {
      expect(isIdentifierStartImpl(NaN)).toBe(false);
    });
    it("returns false if provided codepoint is larger than 0x10FFFF", function () {
      expect(isIdentifierStartImpl(0x110000)).toBe(false);
    });
  });
}