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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script>
/**
* Because browsers that implement requestAnimationFrame may not execute
* animation functions while a window is not displayed (e.g. in a hidden
* iframe as in these tests), we mask the native implementations here. The
* native requestAnimationFrame functionality is tested in Util.html and
* in PanZoom.html (where a popup is opened before panning). The panTo tests
* here will test the fallback setTimeout implementation for animation.
*/
window.requestAnimationFrame =
window.webkitRequestAnimationFrame =
window.mozRequestAnimationFrame =
window.oRequestAnimationFrame =
window.msRequestAnimationFrame = null;
</script>
<script src="../OLLoader.js"></script>
<script type="text/javascript">
var map, layer;
function setUp() {
layer = new OpenLayers.Layer.UTFGrid({
url: "../data/utfgrid/world_utfgrid/${z}/${x}/${y}.json",
isBaseLayer: true,
utfgridResolution: 4
});
map = new OpenLayers.Map({
div: "map",
projection: "EPSG:900913",
layers: [layer],
center: [0, 0],
zoom: 1,
tileManager: null
});
}
function tearDown() {
map.destroy();
map = null;
layer = null;
}
function test_constructor(t) {
t.plan(7);
setUp();
var position = new OpenLayers.Pixel(20, 30);
var bounds = new OpenLayers.Bounds(1, 2, 3, 4);
var url = "http://example.com/";
var size = new OpenLayers.Size(5, 6);
var tile = new OpenLayers.Tile.UTFGrid(layer, position, bounds, url, size);
t.ok(tile instanceof OpenLayers.Tile, "tile instance");
t.ok(tile instanceof OpenLayers.Tile.UTFGrid, "UTFGrid tile instance");
t.ok(tile.layer === layer, "layer set");
t.ok(tile.position.equals(position), "position set");
t.ok(tile.bounds.equals(bounds), "bounds set");
t.eq(tile.url, url, "url set");
t.ok(tile.size.equals(size), "size set");
tearDown();
}
function test_parseData(t) {
t.plan(2);
setUp();
var tile = layer.grid[0][0];
tile.parseData('{"foo": "bar"}');
t.eq(tile.json, {foo: "bar"}, "valid json parsed");
var err, obj;
try {
obj = tile.parseData('foo bar');
} catch (e) {
err = e;
}
// The JSON format doesn't actually throw on IE6, so we also check
// for undefined here.
t.ok(err instanceof Error || obj === undefined, "throws on invalid json");
tearDown();
}
function test_draw(t) {
t.plan(7);
setUp();
var position = new OpenLayers.Pixel(20, 30);
var bounds = new OpenLayers.Bounds(1, 2, 3, 4);
var url = "../data/utfgrid/world_utfgrid/${z}/${x}/${y}.json";
var size = new OpenLayers.Size(256, 256);
var tile = new OpenLayers.Tile.UTFGrid(layer, position, bounds, url, size);
var log = [];
function logger(event) {
log.push(event);
}
tile.events.on({
loadstart: logger,
reload: logger,
loadend: logger
});
t.eq(log.length, 0, "no events logged");
// start tile loading
tile.draw();
t.eq(log.length, 1, "[first draw] one event");
t.eq(log[0].type, "loadstart", "[first draw] loadstart");
// restart tile loading
log.length = 0;
tile.draw();
t.eq(log.length, 1, "[second draw] first event");
t.eq(log[0].type, "reload", "[second draw] reload");
// wait for tile loading to finish
t.delay_call(1, function() {
t.eq(log.length, 2, "[second draw] second event");
t.eq(log[1].type, "loadend", "[second draw] loadend");
tearDown();
});
}
function test_abortLoading(t) {
t.plan(7);
setUp();
var position = new OpenLayers.Pixel(20, 30);
var bounds = new OpenLayers.Bounds(1, 2, 3, 4);
var url = "../data/utfgrid/world_utfgrid/${z}/${x}/${y}.json";
var size = new OpenLayers.Size(256, 256);
var tile = new OpenLayers.Tile.UTFGrid(layer, position, bounds, url, size);
var log = [];
function logger(event) {
log.push(event);
}
tile.events.on({
loadstart: logger,
reload: logger,
loadend: logger
});
t.eq(log.length, 0, "no events logged");
// start tile loading
tile.draw();
t.eq(log.length, 1, "[first draw] one event");
t.eq(log[0].type, "loadstart", "[first draw] loadstart");
// abort tile loading
log.length = 0;
tile.abortLoading();
t.eq(log.length, 0, "[first abort] no events logged"); // TODO: does anybody need an abort event?
// abort again for the heck of it
var err;
try {
tile.abortLoading();
} catch (e) {
err = e;
}
t.ok(!err, "[second abort] no trouble");
t.eq(log.length, 0, "[second abort] no events");
// wait to confirm tile loading doesn't happen after abort
t.delay_call(1, function() {
t.eq(log.length, 0, "[wait] no events");
tearDown();
});
}
function test_getFeatureId(t) {
t.plan(3);
setUp();
var tile = layer.grid[1][1];
t.delay_call(0.5, function() {
var id = tile.getFeatureId(16, 60);
t.eq(id, "238", "feature 238 at 16, 60");
t.eq(tile.getFeatureId(18, 63), id, "same feature at 18, 63");
t.eq(tile.getFeatureId(300, 10), null, "null id outside tile");
tearDown();
});
}
function test_getFeatureInfo(t) {
t.plan(3);
setUp();
var tile = layer.grid[1][1];
t.delay_call(0.5, function() {
var info = tile.getFeatureInfo(16, 60);
var exp = {
id: "238",
data: {
NAME: "Svalbard",
POP2005: 0
}
};
t.eq(info, exp, "feature info at 16, 60");
t.eq(tile.getFeatureInfo(17, 62), exp, "same feature at 17, 62");
t.eq(tile.getFeatureInfo(300, 10), null, "undefined outside tile");
tearDown();
});
}
// While I dislike committing tests that aren't run, I'd like to make an
// exception here. This test (or something like it) should pass. When
// https://github.com/mapbox/utfgrid-spec/issues/1 is resolved, we should
// either modify this or update demo.json and enable the test.
function xtest_getFeatureId_demo(t) {
/**
* The UTFGrid 1.2 spec (https://github.com/mapbox/utfgrid-spec/blob/master/1.2/utfgrid.md)
* links to a demo.json to be used for testing implementations. This
* file is constructed with 256x256 data points. Each data point maps
* to a "feature id" using this heuristic:
*
* // x and y are pixel offsets from top left of 256x256 tile
* if (y < 255 || x < 222) {
* id = (y * 256) + x
* } else {
* id = 65501; // max number of ids that can be encoded
* }
*/
t.plan(1);
setUp();
// look at this beauty of a constructor
var tile = new OpenLayers.Tile.UTFGrid(
layer, // layer
new OpenLayers.Pixel(0, 0), // position
new OpenLayers.Bounds(0, 0, 256, 256), // bounds
"../data/utfgrid/demo-1.1.json", // url
new OpenLayers.Size(256, 256), // size
{utfgridResolution: 1} // options
);
var err;
var request = new OpenLayers.Request.GET({
url: tile.url,
success: function(req) {
try {
tile.parseData(req.responseText);
} catch (e) {
err = e;
}
},
failure: function(req) {
err = new Error("Failed to fetch json. Status: " + req.status);
}
});
// wait for response and parsing, then make assertions
t.delay_call(1, function() {
if (err) {
t.fail(err);
} else {
var got, exp, failure;
outer: for (var y=0; y<256; ++y) {
for (var x=0; x<256; ++x) {
if (y<255 || x<222) {
exp = String((y * 256) + x);
} else {
exp = "65501";
}
got = tile.getFeatureId(x, y);
if (got !== exp) {
failure = "Failed to get id for (" + x + ", " + y + "): " +
"got " + got + " but expected " + exp;
break outer;
}
}
}
if (!failure) {
t.ok(true, "resolved feature ids for all data points");
} else {
t.fail(failure);
}
}
tearDown();
});
}
</script>
</head>
<body>
<div id="map" style="height:550px;width:500px"></div>
</body>
</html>
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