interesting.ts

  it("Should preserve boundaries after the program has run", async () => {
    const boundary = createBoundary();
    const handler: Handler = {
      *[DefaultEffectHandler](_, resume) {
        return yield resume("it works!");
      }
    };

    function* root() {
      yield boundary.withContext();
      return yield "complete";
    }

    const programResult = await runProgram(withHandler(handler, root()));

    expect(programResult).toBe("complete");

    const result = await boundary.into(function*() {
      return yield performEffect({ type: "anything at all" });
    })();

    expect(result).toBe("it works!");
  });