tilebelt/test.js at master · luothink/tilebelt · GitHub

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'use strict';

var test = require('tape').test,
    tilebelt = require('./');

var tile1 = [5, 10, 10];

test('tile to geojson', function (t) {
    var geojson = tilebelt.tileToGeoJSON(tile1);
    t.ok(geojson, 'get geojson representation of tile');
    t.equal(geojson.type, 'Polygon');
    t.deepEqual(geojson.coordinates, [[
        [-178.2421875, 84.73838712095339],
        [-178.2421875, 84.7060489350415],
        [-177.890625, 84.7060489350415],
        [-177.890625, 84.73838712095339],
        [-178.2421875, 84.73838712095339]
    ]], 'Coordinates');
    t.end();
});

test('tile to bbox', function (t) {
    var ext = tilebelt.tileToBBOX(tile1);
    t.ok(ext, 'get geojson representation of tile');
    t.deepEqual(ext,
        [-178.2421875, 84.7060489350415, -177.890625, 84.73838712095339],
        'extent');
    t.end();
});

test('get parent', function (t) {
    var parent = tilebelt.getParent(tile1);
    t.ok(parent);
    t.equal(parent.length, 3);
    t.equal(parent[0], 2);
    t.equal(parent[1], 5);
    t.equal(parent[2], 9);
    t.end();
});

test('get siblings', function (t) {
    var siblings = tilebelt.getSiblings(t);
    t.ok(siblings);
    t.equal(siblings.length, 4);
    t.equal(siblings[0].length, 3);
    t.end();
});

test('has siblings', function (t) {
    var tiles1 = [
        [0, 0, 5],
        [0, 1, 5],
        [1, 1, 5],
        [1, 0, 5]
    ];
    var tiles2 = [
        [0, 0, 5],
        [0, 1, 5],
        [1, 1, 5]
    ];

    t.equals(tilebelt.hasSiblings([0, 0, 5], tiles1), true);
    t.equals(tilebelt.hasSiblings([0, 1, 5], tiles1), true);
    t.equals(tilebelt.hasSiblings([0, 0, 5], tiles2), false);
    t.equals(tilebelt.hasSiblings([0, 0, 5], tiles2), false);
    t.end();
});

test('has tile', function (t) {
    var tiles1 = [
        [0, 0, 5],
        [0, 1, 5],
        [1, 1, 5],
        [1, 0, 5]
    ];

    t.equals(tilebelt.hasSiblings([2, 0, 5], tiles1), false);
    t.equals(tilebelt.hasSiblings([0, 1, 5], tiles1), true);
    t.end();
});

test('get quadkey', function (t) {
    var key = tilebelt.tileToQuadkey([11, 3, 8]);
    t.equal(key, '00001033');
    t.end();
});

test('quadkey to tile', function (t) {
    var quadkey = '00001033';
    var tile = tilebelt.quadkeyToTile(quadkey);
    t.equal(tile.length, 3);
    t.end();
});

test('point to tile', function (t) {
    var tile = tilebelt.pointToTile(0, 0, 10);
    t.equal(tile.length, 3);
    t.equal(tile[2], 10);
    t.end();
});

test('point to tile verified', function (t) {
    var tile = tilebelt.pointToTile(-77.03239381313323, 38.91326516559442, 10);
    t.equal(tile.length, 3);
    t.equal(tile[0], 292);
    t.equal(tile[1], 391);
    t.equal(tile[2], 10);
    t.equal(tilebelt.tileToQuadkey(tile), '0320100322');
    t.end();
});

test('point and tile back and forth', function (t) {
    var tile = tilebelt.pointToTile(10, 10, 10);
    t.equal(tile.toString(), tilebelt.quadkeyToTile(tilebelt.tileToQuadkey(tile)).toString());
    t.end();
});

test('check key 03', function (t) {
    var quadkey = '03';
    t.equal(tilebelt.quadkeyToTile(quadkey).toString(), [1, 1, 2].toString());
    t.end();
});

test('bbox to tile -- big', function (t) {
    var bbox = [-84.72656249999999, 11.178401873711785, -5.625, 61.60639637138628];
    var tile = tilebelt.bboxToTile(bbox);
    t.ok(tile, 'convert bbox to tile');
    t.equal(tile[0], 1);
    t.equal(tile[1], 1);
    t.equal(tile[2], 2);
    t.end();
});

test('bbox to tile -- no area', function (t) {
    var bbox = [-84, 11, -84, 11];
    var tile = tilebelt.bboxToTile(bbox);
    t.ok(tile, 'convert bbox to tile');
    t.deepEqual(tile, [71582788, 125964677, 28]);
    t.end();
});

test('bbox to tile -- dc', function (t) {
    var bbox = [-77.04615354537964, 38.899967510782346, -77.03664779663086, 38.90728142481329];
    var tile = tilebelt.bboxToTile(bbox);
    t.ok(tile, 'convert bbox to tile');
    t.equal(tile[0], 9371);
    t.equal(tile[1], 12534);
    t.equal(tile[2], 15);
    t.end();
});

test('bbox to tile -- crossing 0 lat/lng', function (t) {
    var bbox = [-10, -10, 10, 10];
    var tile = tilebelt.bboxToTile(bbox);
    t.ok(tile, 'convert bbox to tile');
    t.equal(tile[0], 0);
    t.equal(tile[1], 0);
    t.equal(tile[2], 0);
    t.end();
});

test('tile to bbox -- verify bbox order', function (t) {
    var tile =  [13, 11, 5];
    var bbox = tilebelt.tileToBBOX(tile);
    t.equal(bbox[0] < bbox[2], true, 'east is less than west');
    t.equal(bbox[1] < bbox[3], true, 'south is less than north');

    tile =  [20, 11, 5];
    bbox = tilebelt.tileToBBOX(tile);
    t.equal(bbox[0] < bbox[2], true, 'east is less than west');
    t.equal(bbox[1] < bbox[3], true, 'south is less than north');

    tile =  [143, 121, 8];
    bbox = tilebelt.tileToBBOX(tile);
    t.equal(bbox[0] < bbox[2], true, 'east is less than west');
    t.equal(bbox[1] < bbox[3], true, 'south is less than north');

    tile =  [999, 1000, 17];
    bbox = tilebelt.tileToBBOX(tile);
    t.equal(bbox[0] < bbox[2], true, 'east is less than west');
    t.equal(bbox[1] < bbox[3], true, 'south is less than north');
    t.end();
});

test('pointToTileFraction', function (t) {
    var tile = tilebelt.pointToTileFraction(-95.93965530395508, 41.26000108568697, 9);
    t.ok(tile, 'convert point to tile fraction');
    t.equal(tile[0], 119.552490234375);
    t.equal(tile[1], 191.47119140625);
    t.equal(tile[2], 9);
    t.end();
});

test('pointToTile -- cross meridian', function (t) {
    // X axis
    // https://github.com/mapbox/tile-cover/issues/75
    // https://github.com/mapbox/tilebelt/pull/32
    t.deepEqual(tilebelt.pointToTile(-180, 0, 0), [0, 0, 0], '[-180, 0] zoom 0');
    t.deepEqual(tilebelt.pointToTile(-180, 85, 2), [0, 0, 2], '[-180, 85] zoom 2');
    t.deepEqual(tilebelt.pointToTile(180, 85, 2), [0, 0, 2], '[+180, 85] zoom 2');
    t.deepEqual(tilebelt.pointToTile(-185, 85, 2), [3, 0, 2], '[-185, 85] zoom 2');
    t.deepEqual(tilebelt.pointToTile(185, 85, 2), [0, 0, 2], '[+185, 85] zoom 2');

    // Y axis
    // Does not wrap Tile Y
    t.deepEqual(tilebelt.pointToTile(-175, -95, 2), [0, 3, 2], '[-175, -95] zoom 2');
    t.deepEqual(tilebelt.pointToTile(-175, 95, 2), [0, 0, 2], '[-175, +95] zoom 2');
    t.deepEqual(tilebelt.pointToTile(-175, 95, 2), [0, 0, 2], '[-175, +95] zoom 2');

    // BBox
    // https://github.com/mapbox/tilebelt/issues/12
    t.deepEqual(tilebelt.bboxToTile([-0.000001, -85, 1000000, 85]), [0, 0, 0]);
    t.end();
});