1import { describe, expect, test } from "vitest";2import {3 decodePeachScript,4 encodePeachScript,5 isPeachScript,6 normalisePeachScript,7} from "./peachScript";89describe("peachScript", () => {10 test("byte 0 maps to U+E000", () => {11 const out = encodePeachScript(new Uint8Array([0]));12 expect(out.codePointAt(0)).toBe(0xe000);13 });1415 test("byte 255 maps to U+E0FF", () => {16 const out = encodePeachScript(new Uint8Array([255]));17 expect(out.codePointAt(0)).toBe(0xe0ff);18 });1920 test("round-trip identity for all 256 byte values", () => {21 const bytes = new Uint8Array(256);22 for (let i = 0; i < 256; i++) bytes[i] = i;23 const encoded = encodePeachScript(bytes);24 const decoded = decodePeachScript(encoded);25 expect(decoded).toEqual(bytes);26 });2728 test("empty bytes round-trip to empty string and back", () => {29 expect(encodePeachScript(new Uint8Array())).toBe("");30 expect(decodePeachScript("")).toEqual(new Uint8Array());31 });3233 test("decode throws on character outside PUA range", () => {34 expect(() => decodePeachScript("hello")).toThrow("INVALID_PEACHSCRIPT_CHARACTER");35 expect(() => decodePeachScript(String.fromCodePoint(0xe100))).toThrow(36 "INVALID_PEACHSCRIPT_CHARACTER"37 );38 expect(() => decodePeachScript(String.fromCodePoint(0xdfff))).toThrow(39 "INVALID_PEACHSCRIPT_CHARACTER"40 );41 });4243 test("random-payload round-trip preserves bytes", () => {44 const payload = crypto.getRandomValues(new Uint8Array(2048));45 const decoded = decodePeachScript(encodePeachScript(payload));46 expect(decoded).toEqual(payload);47 });4849 test("normalisePeachScript strips whitespace", () => {50 const encoded = encodePeachScript(new Uint8Array([1, 2, 3, 4]));51 const wrapped = encoded.slice(0, 2) + "\n " + encoded.slice(2);52 expect(normalisePeachScript(wrapped)).toBe(encoded);53 });5455 test("isPeachScript accepts only PUA strings", () => {56 expect(isPeachScript(encodePeachScript(new Uint8Array([1, 2, 3])))).toBe(true);57 expect(isPeachScript("")).toBe(false);58 expect(isPeachScript("hello")).toBe(false);59 const mixed = encodePeachScript(new Uint8Array([1])) + "x";60 expect(isPeachScript(mixed)).toBe(false);61 });62});