PMTiles/js/index.test.ts

import { test } from "zora";
import {
  unshift,
  getUint24,
  getUint48,
  queryLeafdir,
  queryLeafLevel,
  queryTile,
  parseEntry,
  Entry,
  createDirectory,
} from "./index";

test("stub data", (assertion) => {
  let data = createDirectory([
    { z: 5, x: 1000, y: 2000, offset: 1000, length: 2000, is_dir: false },
    {
      z: 14,
      x: 16383,
      y: 16383,
      offset: 999999,
      length: 999,
      is_dir: false,
    },
  ]);
  let dataview = new DataView(data);

  var z_raw = dataview.getUint8(17 + 0);
  var x = getUint24(dataview, 17 + 1);
  var y = getUint24(dataview, 17 + 4);
  var offset = getUint48(dataview, 17 + 7);
  var length = dataview.getUint32(17 + 13, true);
  assertion.ok(z_raw === 14);
  assertion.ok(x === 16383);
  assertion.ok(y === 16383);
});

test("get entry", (assertion) => {
  let data = createDirectory([
    { z: 5, x: 1000, y: 2000, offset: 1000, length: 2000, is_dir: false },
    {
      z: 14,
      x: 16383,
      y: 16383,
      offset: 999999,
      length: 999,
      is_dir: false,
    },
  ]);
  let view = new DataView(data);
  let entry = queryTile(view, 14, 16383, 16383);
  assertion.ok(entry!.z === 14);
  assertion.ok(entry!.x === 16383);
  assertion.ok(entry!.y === 16383);
  assertion.ok(entry!.offset === 999999);
  assertion.ok(entry!.length === 999);
  assertion.ok(entry!.is_dir === false);
  assertion.ok(queryLeafdir(view, 14, 16383, 16383) === null);
});

test("get leafdir", (assertion) => {
  let data = createDirectory([
    {
      z: 14,
      x: 16383,
      y: 16383,
      offset: 999999,
      length: 999,
      is_dir: true,
    },
  ]);
  let view = new DataView(data);
  let entry = queryLeafdir(view, 14, 16383, 16383);
  assertion.ok(entry!.z === 14);
  assertion.ok(entry!.x === 16383);
  assertion.ok(entry!.y === 16383);
  assertion.ok(entry!.offset === 999999);
  assertion.ok(entry!.length === 999);
  assertion.ok(entry!.is_dir === true);
  assertion.ok(queryTile(view, 14, 16383, 16383) === null);
});

test("derive the leaf level", (assertion) => {
  let data = createDirectory([
    {
      z: 6,
      x: 3,
      y: 3,
      offset: 0,
      length: 0,
      is_dir: true,
    },
  ]);
  let view = new DataView(data);
  let level = queryLeafLevel(view);
  assertion.ok(level === 6);
  data = createDirectory([
    {
      z: 6,
      x: 3,
      y: 3,
      offset: 0,
      length: 0,
      is_dir: false,
    },
  ]);
  view = new DataView(data);
  level = queryLeafLevel(view);
  assertion.ok(level === null);
});

test("convert spec v1 directory to spec v2 directory", (assertion) => {
  let data = createDirectory([
    {
      z: 7,
      x: 3,
      y: 3,
      offset: 3,
      length: 3,
      is_dir: true,
    },
    {
      z: 6,
      x: 2,
      y: 2,
      offset: 2,
      length: 2,
      is_dir: false,
    },
    {
      z: 6,
      x: 2,
      y: 1,
      offset: 1,
      length: 1,
      is_dir: false,
    },
  ]);
  let view = new DataView(data);
  let entry = queryLeafdir(view, 7, 3, 3);
  assertion.ok(entry!.offset === 3);
  entry = queryTile(view, 6, 2, 2);
  assertion.ok(entry!.offset === 2);
  entry = queryTile(view, 6, 2, 1);
  assertion.ok(entry!.offset === 1);

  entry = parseEntry(view, 0);
  assertion.ok(entry!.offset === 1);
  entry = parseEntry(view, 1);
  assertion.ok(entry!.offset === 2);
  entry = parseEntry(view, 2);
  assertion.ok(entry!.offset === 3);
});