main-test.es5.js

/*eslint no-console: ["error", { allow: ["log"] }] */
import io from "./main.es5.js";

// Root and branches are immutable (frozen with Object.freeze) and thus
// all properties are non-configurable and non-writable after creation
var root = io();
var infiniteWhiteSpaceCollection = [root];
var branch1 = root.branch("testProp", "testValue");
var branch2 = root.branch("testProp", "testValue2");
var branch21 = branch2.branch({
  testProp: "testValue4",
  anotherProp: "ECMAScript ftw"
});
// var reservedPropertyNames = ["branch", "branches", "version"];

// Version tree found in root.branches instead of root.tree
console.log(root.branches[0] === branch1);

// Branches have a version number
console.log(branch1.version === 0);
console.log(branch1.version + 1 === branch2.version);

// The root (and thus branches) has a reference to the current branch
console.log(root.currentBranch === branch21.currentBranch);
console.log(root.currentBranch === branch21);

var branch11 = branch1.branch("testProp", "testValue3");
var branch211 = branch21.branch({ newProp: ":D" });

// Branch changes on branching
console.log(root.currentBranch === branch211);

// The root (and thus branches) has a reference to the root
console.log(root.root === root);
console.log(root === branch21.root);

function logger(branch) {
  // Called with branch when current branch changes
  console.log(branch);
}

var off = root.on(logger);

// Change version to parent branch
root.currentBranch = Object.getPrototypeOf(branch211);

root.off(logger);

// Or call return value of on to unsubscribe
off();

// root.view === branchN.view contains an Object without prototype [Object.create(null)] which has all
// the properties from the prototype chain (excluding view and branches) of the currently active branch.
// Enabling fast existence checking of and access to the current properties,
// without repeated prototype chain traversal.
var view = root.view;
var key;
for (key in view) {
  console.log(key in branch21 && view[key] === branch21[key]);
}
for (key in branch21) {
  console.log(
    root.hasOwnProperty(key) || (key in view && view[key] === branch21[key])
  );
}

// Every branch has a timestamp
console.log(branch11.date <= branch211.date);

// Can de/serialize from/to JSON
var jsonIo = JSON.stringify(root);
var parsedIo = io.fromJSON(jsonIo);
var reStringified = JSON.stringify(parsedIo);
console.log("JSON idempotent: " + (reStringified === jsonIo));

var jsonArr = (document.getElementById("output").innerHTML = JSON.stringify(
  infiniteWhiteSpaceCollection
));

var parsedArr = JSON.parse(jsonArr).map(io.fromParsedJSON);

console.log(parsedArr);