test old rust / new JS compatability

tests.js

const execSync = require("child_process").execSync;
const fs = require("fs")
const crypto = require("crypto")
const assert = require("assert")

function assertNewJsEqOldRust(doc) {
    const bytes = Buffer.from(Automerge.save(doc)).toString("base64")
    const tempFileName = `changes-${crypto.randomBytes(4).readUInt32LE(0)}.json`
    const outFile = `/tmp/${tempFileName}`
    //console.log(`Writing to: ${outFile}`)
    execSync(`../automerge-rs/target/debug/round-trip ${outFile} ${bytes}`)
    const newChanges = JSON.parse(fs.readFileSync(outFile)).map(c => new Uint8Array(c));
    assert(Array.isArray(newChanges))
    fs.unlinkSync(outFile)
    const [finalNewDoc, _] = Automerge.applyChanges(Automerge.init(), newChanges);
    assert.deepStrictEqual(finalNewDoc, doc)
}


let Automerge = require("./src/automerge");

let doc = Automerge.from({
  hello: "world",
  list: [ 1,2,3,4,5,6],
  obj1: {
    key: "val",
    obj2: {
      key: "val2",
      obj3: {
        key: "val3",
        list: [ 1,2,3,4,5,6]
      }
    }
  }
});


console.log("----");
assertNewJsEqOldRust(doc)
console.log(Buffer.from(Automerge.save(doc)).toString("base64"))

doc = Automerge.change(doc, (d) => {
  d.list[3] = "a"
})

console.log("----");
assertNewJsEqOldRust(doc)
console.log(Buffer.from(Automerge.save(doc)).toString("base64"))

doc = Automerge.change(doc, (d) => {
  d.list.push(4)
  d.list.push(5)
  d.list.push(6)
})

console.log("----");
assertNewJsEqOldRust(doc)
console.log(Buffer.from(Automerge.save(doc)).toString("base64"))

doc = Automerge.change(doc, (d) => {
  d.list.unshift(0)
  d.list.unshift(-1)
})

console.log("----");
assertNewJsEqOldRust(doc)
console.log(Buffer.from(Automerge.save(doc)).toString("base64"))