node-dijkstra/test/toDeepMap.test.js

A NodeJS implementation of Dijkstra's algorithm

/* eslint-env node, mocha */
/* eslint import/no-extraneous-dependencies: ["error", {"devDependencies": true}] */

require("must");
const demand = require("must");

const toDeepMap = require("../libs/toDeepMap");

describe("toDeepMap()", () => {
  it("transforms a one level object", () => {
    const obj = { example: 1 };

    const map = toDeepMap(obj);

    map.size.must.equal(1);
    map.get("example").must.equal(1);
  });

  it("transforms a two level object", () => {
    const obj = {
      a: { b: 1 },
    };

    const map = toDeepMap(obj);

    map.size.must.equal(1);
    map.get("a").must.be.instanceOf(Map);
    map.get("a").get("b").must.equal(1);
  });

  it("transforms a three level object", () => {
    const obj = {
      a: {
        b: { c: 1 },
      },
    };

    const map = toDeepMap(obj);

    map.size.must.equal(1);
    map.get("a").must.be.instanceOf(Map);
    map.get("a").get("b").must.be.instanceOf(Map);
    map.get("a").get("b").get("c").must.equal(1);
  });

  it("transforms a four level object", () => {
    const obj = {
      a: {
        b: {
          c: { d: 1 },
        },
      },
    };

    const map = toDeepMap(obj);

    map.size.must.equal(1);
    map.get("a").must.be.instanceOf(Map);
    map.get("a").get("b").get("c").must.be.instanceOf(Map);
    map.get("a").get("b").get("c").get("d").must.equal(1);
  });

  it("rejects non-number values", () => {
    const obj = { example: null };

    demand(toDeepMap.bind(this, obj)).to.throw(Error, /valid node/);
  });

  it("rejects negative values", () => {
    const obj = { example: -3 };

    demand(toDeepMap.bind(this, obj)).to.throw(Error, /valid node/);
  });

  it("rejects 0", () => {
    const obj = { example: 0 };

    demand(toDeepMap.bind(this, obj)).to.throw(Error, /valid node/);
  });

  it("accepts 0.02", () => {
    const obj = { example: 0.02 };

    const map = toDeepMap(obj);

    map.size.must.equal(1);
    map.get("example").must.equal(0.02);
  });

  it("accepts a string reppreseting a number", () => {
    const obj = { example: "4" };

    const map = toDeepMap(obj);

    map.size.must.equal(1);
    map.get("example").must.equal(4);
  });
});