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https://github.com/protomaps/PMTiles.git
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The v3 module is not exported yet; specifics of header design subject to change.
This commit is contained in:
Brandon Liu
295
js/v3.test.ts
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295
js/v3.test.ts
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import { test } from "zora";
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// tests run in node, for convenience
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// we don't need to typecheck all of it
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// @ts-ignore
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import fs from "fs";
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import {
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Entry,
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zxyToTileId,
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tileIdToZxy,
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findTile,
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readVarint,
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Cache,
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BufferPosition,
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Source,
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VersionMismatch,
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PMTiles,
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} from "./v3";
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test("varint", (assertion) => {
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let b: BufferPosition = {
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buf: new Uint8Array([0, 1, 127, 0xe5, 0x8e, 0x26]),
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pos: 0,
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};
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assertion.eq(readVarint(b), 0);
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assertion.eq(readVarint(b), 1);
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assertion.eq(readVarint(b), 127);
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assertion.eq(readVarint(b), 624485);
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b = {
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buf: new Uint8Array([0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f]),
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pos: 0,
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};
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assertion.eq(readVarint(b), 9007199254740991);
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});
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test("zxy to tile id", (assertion) => {
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assertion.eq(zxyToTileId(0, 0, 0), 0);
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assertion.eq(zxyToTileId(1, 0, 0), 1);
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assertion.eq(zxyToTileId(1, 0, 1), 2);
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assertion.eq(zxyToTileId(1, 1, 1), 3);
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assertion.eq(zxyToTileId(1, 1, 0), 4);
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assertion.eq(zxyToTileId(2, 0, 0), 5);
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});
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test("tile id to zxy", (assertion) => {
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assertion.eq(tileIdToZxy(0), [0, 0, 0]);
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assertion.eq(tileIdToZxy(1), [1, 0, 0]);
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assertion.eq(tileIdToZxy(2), [1, 0, 1]);
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assertion.eq(tileIdToZxy(3), [1, 1, 1]);
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assertion.eq(tileIdToZxy(4), [1, 1, 0]);
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assertion.eq(tileIdToZxy(5), [2, 0, 0]);
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});
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test("a lot of tiles", (assertion) => {
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for (let z = 0; z < 9; z++) {
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for (let x = 0; x < 1 << z; x++) {
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for (let y = 0; y < 1 << z; y++) {
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const result = tileIdToZxy(zxyToTileId(z, x, y));
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if (result[0] !== z || result[1] !== x || result[2] !== y) {
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assertion.fail("roundtrip failed");
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}
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}
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}
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}
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});
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test("tile search for missing entry", (assertion) => {
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const entries: Entry[] = [];
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assertion.eq(findTile(entries, 101), null);
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});
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test("tile search for first entry == id", (assertion) => {
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const entries: Entry[] = [{ tileId: 100, offset: 1, length: 1, runLength: 1 }];
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const entry = findTile(entries, 100)!;
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assertion.eq(entry.offset, 1);
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assertion.eq(entry.length, 1);
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assertion.eq(findTile(entries, 101), null);
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});
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test("tile search with multiple tile entries", (assertion) => {
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let entries: Entry[] = [{ tileId: 100, offset: 1, length: 1, runLength: 2 }];
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let entry = findTile(entries, 101)!;
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assertion.eq(entry.offset, 1);
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assertion.eq(entry.length, 1);
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entries = [
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{ tileId: 100, offset: 1, length: 1, runLength: 1 },
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{ tileId: 150, offset: 2, length: 2, runLength: 2 },
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];
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entry = findTile(entries, 151)!;
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assertion.eq(entry.offset, 2);
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assertion.eq(entry.length, 2);
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entries = [
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{ tileId: 50, offset: 1, length: 1, runLength: 2 },
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{ tileId: 100, offset: 2, length: 2, runLength: 1 },
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{ tileId: 150, offset: 3, length: 3, runLength: 1 },
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];
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entry = findTile(entries, 51)!;
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assertion.eq(entry.offset, 1);
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assertion.eq(entry.length, 1);
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});
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test("leaf search", (assertion) => {
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const entries: Entry[] = [{ tileId: 100, offset: 1, length: 1, runLength: 0 }];
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const entry = findTile(entries, 150);
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assertion.eq(entry!.offset, 1);
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assertion.eq(entry!.length, 1);
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});
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// inefficient method only for testing
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class TestNodeFileSource implements Source {
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buffer: ArrayBuffer;
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path: string;
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key: string;
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etag?: string;
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constructor(path: string, key: string) {
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this.path = path;
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this.buffer = fs.readFileSync(path);
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this.key = key;
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}
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getKey() {
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return this.key;
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}
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replaceData(path: string) {
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this.path = path;
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this.buffer = fs.readFileSync(path);
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}
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async getBytes(
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offset: number,
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length: number
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): Promise<[ArrayBuffer, string?]> {
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const slice = new Uint8Array(this.buffer.slice(offset, offset + length))
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.buffer;
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return [slice, this.etag];
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}
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}
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// echo '{"type":"Polygon","coordinates":[[[0,0],[0,1],[1,1],[1,0],[0,0]]]}' | ./tippecanoe -zg -o test_fixture_1.pmtiles
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test("cache getHeader", async (assertion) => {
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const source = new TestNodeFileSource("test_fixture_1.pmtiles", "1");
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const cache = new Cache();
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const header = await cache.getHeader(source);
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assertion.eq(header.rootDirectoryOffset, 122);
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assertion.eq(header.rootDirectoryLength, 25);
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assertion.eq(header.jsonMetadataOffset, 147);
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assertion.eq(header.jsonMetadataLength, 239);
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assertion.eq(header.leafDirectoryOffset, 0);
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assertion.eq(header.leafDirectoryLength, 0);
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assertion.eq(header.tileDataOffset, 386);
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assertion.eq(header.tileDataLength, 69);
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assertion.eq(header.numAddressedTiles, 1);
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assertion.eq(header.numTileEntries, 1);
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assertion.eq(header.numTileContents, 1);
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assertion.eq(header.clustered, false);
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assertion.eq(header.internalCompression, 1);
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assertion.eq(header.tileCompression, 1);
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assertion.eq(header.tileType, 1);
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assertion.eq(header.minZoom, 0);
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assertion.eq(header.maxZoom, 0);
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assertion.eq(header.minLon, 0);
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assertion.eq(header.minLat, 0);
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// assertion.eq(header.maxLon,1); // TODO fix me
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assertion.eq(header.maxLat, 1);
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});
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test("cache check against empty", async (assertion) => {
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const source = new TestNodeFileSource("empty.pmtiles", "1");
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const cache = new Cache();
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try {
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await cache.getHeader(source);
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assertion.fail("Should have thrown");
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} catch (e) {
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assertion.ok(e instanceof Error);
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}
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});
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test("cache check magic number", async (assertion) => {
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const source = new TestNodeFileSource("invalid.pmtiles", "1");
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const cache = new Cache();
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try {
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await cache.getHeader(source);
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assertion.fail("Should have thrown");
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} catch (e) {
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console.log(e);
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assertion.ok(e instanceof Error);
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}
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});
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test("cache getDirectory", async (assertion) => {
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const source = new TestNodeFileSource("test_fixture_1.pmtiles", "1");
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let cache = new Cache(6400, false);
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let header = await cache.getHeader(source);
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assertion.eq(cache.cache.size, 1);
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cache = new Cache(6400, true);
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header = await cache.getHeader(source);
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// prepopulates the root directory
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assertion.eq(cache.cache.size, 2);
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const directory = await cache.getDirectory(
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source,
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header.rootDirectoryOffset,
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header.rootDirectoryLength,
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header
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);
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assertion.eq(directory.length, 1);
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assertion.eq(directory[0].tileId, 0);
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assertion.eq(directory[0].offset, 0);
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assertion.eq(directory[0].length, 69);
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assertion.eq(directory[0].runLength, 1);
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for (const v of cache.cache.values()) {
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assertion.ok(v.lastUsed > 0);
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assertion.ok(v.size > 0);
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}
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});
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test("multiple sources in a single cache", async (assertion) => {
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const cache = new Cache();
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const source1 = new TestNodeFileSource("test_fixture_1.pmtiles", "1");
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const source2 = new TestNodeFileSource("test_fixture_1.pmtiles", "2");
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await cache.getHeader(source1);
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assertion.eq(cache.cache.size, 2);
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await cache.getHeader(source2);
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assertion.eq(cache.cache.size, 4);
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});
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test("etags are part of key", async (assertion) => {
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const cache = new Cache(6400, false);
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const source = new TestNodeFileSource("test_fixture_1.pmtiles", "1");
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source.etag = "etag_1";
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let header = await cache.getHeader(source);
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assertion.eq(header.etag, "etag_1");
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source.etag = "etag_2";
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try {
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await cache.getDirectory(
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source,
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header.rootDirectoryOffset,
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header.rootDirectoryLength,
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header
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);
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assertion.fail("Should have thrown");
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} catch (e) {
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assertion.ok(e instanceof VersionMismatch);
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}
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cache.invalidate(source);
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header = await cache.getHeader(source);
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assertion.ok(
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await cache.getDirectory(
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source,
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header.rootDirectoryOffset,
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header.rootDirectoryLength,
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header
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)
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);
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});
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test("cache pruning by byte size", async (assertion) => {
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const cache = new Cache(1000, false);
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cache.cache.set("0", { lastUsed: 0, data: Promise.resolve([]), size: 400 });
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cache.cache.set("1", { lastUsed: 1, data: Promise.resolve([]), size: 200 });
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cache.cache.set("2", { lastUsed: 2, data: Promise.resolve([]), size: 900 });
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cache.sizeBytes = 900 + 200 + 400;
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cache.prune();
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assertion.eq(cache.cache.size, 1);
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assertion.ok(cache.cache.get("2"));
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});
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test("pmtiles get metadata", async (assertion) => {
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const source = new TestNodeFileSource("test_fixture_1.pmtiles", "1");
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const p = new PMTiles(source);
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const metadata = await p.getMetadata();
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assertion.ok(metadata.name);
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});
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test("pmtiles handle retries", async (assertion) => {
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const source = new TestNodeFileSource("test_fixture_1.pmtiles", "1");
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source.etag = "1";
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const p = new PMTiles(source);
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const metadata = await p.getMetadata();
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assertion.ok(metadata.name);
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source.etag = "2";
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source.replaceData("test_fixture_2.pmtiles");
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assertion.ok(await p.getZxy(0, 0, 0));
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});
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