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Add some tests for ol.source.TileUTFGrid

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This commit is contained in:
Marc Jansen
2016-03-23 09:21:57 +01:00
parent e5012856a1
commit f4b4e26f19
3 changed files with 761 additions and 0 deletions
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286
test/spec/ol/source/tileutfgridsource.test.js Normal file
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goog.provide('ol.test.source.TileUTFGrid');
describe('ol.source.TileUTFGrid', function() {
var tileJson = null;
// Called once for this describe section, this method loads a local
// tileutfgrid and stores it in a variable to compare it in the actual
// tests. This way we can test `handleTileJSONResponse` and also remove
// the dependency from the external service / URL.
before(function(done) {
var client = new XMLHttpRequest();
client.addEventListener('load', function() {
tileJson = JSON.parse(this.responseText);
done();
});
client.addEventListener('error', function() {
done(new Error('Failed to fetch local tileutfgrid.json'))
});
client.open('GET', 'spec/ol/data/tileutfgrid.json');
client.send();
});
after(function() {
tileJson = null;
});
var url = 'some-tileutfgrid-url';
function getTileUTFGrid() {
var source = new ol.source.TileUTFGrid({
url: url
});
return source;
}
describe('constructor', function() {
it('needs to be constructed with url option', function() {
var source;
expect(function() {
// no options: will throw
source = new ol.source.TileUTFGrid();
}).to.throwException();
expect(source).to.be(undefined);
expect(function() {
// no url-option: will throw
source = new ol.source.TileUTFGrid({});
}).to.throwException();
expect(source).to.be(undefined);
expect(function() {
// with a (bogus) url option all is fine
source = new ol.source.TileUTFGrid({
url: url
});
}).to.not.throwException();
expect(source).to.be.an(ol.source.TileUTFGrid);
expect(function() {
// also test our utility method
source = getTileUTFGrid();
}).to.not.throwException();
expect(source).to.be.an(ol.source.TileUTFGrid);
});
it('immediately fetches the passed URL', function() {
// spy on the jsonp method
var jsonpSpy = sinon.spy(ol.net, 'jsonp');
getTileUTFGrid();
expect(jsonpSpy.calledOnce).to.be(true);
expect(jsonpSpy.lastCall.calledWith(url)).to.be(true);
// cleanup
ol.net.jsonp.restore();
jsonpSpy = null;
});
});
describe('#handleTileJSONResponse', function() {
it('sets up a tileGrid', function() {
var source = getTileUTFGrid();
expect(source.getTileGrid()).to.be(null);
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
var tileGrid = source.getTileGrid()
expect(tileGrid).to.not.be(null);
expect(tileGrid).to.be.an(ol.tilegrid.TileGrid);
});
it('sets up a tilegrid with expected extent', function() {
var source = getTileUTFGrid();
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
var tileGrid = source.getTileGrid();
var extent = tileGrid.getExtent();
var proj4326 = ol.proj.get('EPSG:4326');
var proj3857 = ol.proj.get('EPSG:3857');
var expectedExtent4326 = tileJson.bounds;
var expectedExtent3857 = ol.proj.transformExtent(
expectedExtent4326, proj4326, proj3857
);
expect(extent).to.eql(proj3857.getExtent());
expect(extent[0]).to.roughlyEqual(expectedExtent3857[0], 1e-8);
expect(extent[1]).to.roughlyEqual(expectedExtent3857[1], 1e-8);
expect(extent[2]).to.roughlyEqual(expectedExtent3857[2], 1e-8);
expect(extent[3]).to.roughlyEqual(expectedExtent3857[3], 1e-8);
});
it('sets up a tilegrid with expected minZoom', function() {
var source = getTileUTFGrid();
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
var tileGrid = source.getTileGrid();
var minZoom = tileGrid.getMinZoom();
expect(minZoom).to.eql(tileJson.minzoom);
});
it('sets up a tilegrid with expected maxZoom', function() {
var source = getTileUTFGrid();
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
var tileGrid = source.getTileGrid();
var maxZoom = tileGrid.getMaxZoom();
expect(maxZoom).to.eql(tileJson.maxzoom);
})
it('sets up a template', function() {
var source = getTileUTFGrid();
expect(source.getTemplate()).to.be(undefined);
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
var template = source.getTemplate();
expect(template).to.not.be(undefined);
expect(template).to.be(tileJson.template);
});
it('sets up correct attribution', function() {
var source = getTileUTFGrid();
expect(source.getAttributions()).to.be(null);
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
var attributions = source.getAttributions();
expect(attributions).to.not.be(null);
expect(attributions).to.have.length(1);
expect(attributions[0].getHTML()).to.be(tileJson.attribution);
var tileRanges = attributions[0].tileRanges_
for (var z = tileJson.minzoom; z <= tileJson.maxzoom; z++) {
var key = z.toString()
expect(key in tileRanges).to.be(true);
}
});
it('sets correct state', function() {
var source = getTileUTFGrid();
expect(source.getState()).to.be(ol.source.State.LOADING);
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
expect(source.getState()).to.be(ol.source.State.READY);
});
});
describe('#forDataAtCoordinateAndResolution', function() {
var source = null;
var bonn3857 = ol.proj.fromLonLat([7.099814, 50.733992]);
var noState3857 = [0, 0];
var resolutionZoom1 = 78271.51696402048;
var gridJson110 = null;
// Called once for this describe section, this method will request a local
// grid for one tile (1/1/0) and store the result in a variable. This allows
// us to overwrite getTile in a way that removes the dependency on an
// external service. See below in the `beforeEach`-method.
before(function(done) {
var client = new XMLHttpRequest();
client.addEventListener('load', function() {
gridJson110 = JSON.parse(this.responseText);
done();
});
client.addEventListener('error', function() {
done(new Error('Failed to fetch local grid.json'))
});
client.open('GET', 'spec/ol/data/mapbox-geography-class-1-1-0.grid.json');
client.send();
});
after(function() {
gridJson110 = null;
});
beforeEach(function() {
source = getTileUTFGrid();
// call the handleTileJSONResponse method with our
// locally available tileJson (from `before`)
source.handleTileJSONResponse(tileJson);
// Override getTile method to not depend on the external service. The
// signature of the method is kept the same, but the returned tile will
// always be for [1, 1 -1].
source.getTile = function(z, x, y, pixelRatio, projection) {
var tileCoord = [1, 1, -1]; // overwritten to match our stored JSON
var urlTileCoord =
this.getTileCoordForTileUrlFunction(tileCoord, projection);
var tileUrl = this.tileUrlFunction_(urlTileCoord, pixelRatio, projection);
var tile = new ol.source.TileUTFGridTile_(
tileCoord,
tileUrl !== undefined ? ol.TileState.IDLE : ol.TileState.EMPTY,
tileUrl !== undefined ? tileUrl : '',
this.tileGrid.getTileCoordExtent(tileCoord),
true); // always preemptive, so loading doesn't happen automatically
// manually call handleLoad_ with our local JSON data
tile.handleLoad_(gridJson110);
return tile;
};
});
afterEach(function() {
source = null;
});
it('calls callback with data if found', function(done) {
var callback = function(data) {
expect(arguments).to.have.length(1);
expect(data).to.not.be(null);
expect('admin' in data).to.be(true);
expect(data.admin).to.be('Germany');
done();
};
source.forDataAtCoordinateAndResolution(
bonn3857, resolutionZoom1, callback, null, true
);
});
it('calls callback with correct `this` bound', function(done) {
var scope = {foo: 'bar'};
var callback = function(data) {
expect(this).to.be(scope);
done();
};
source.forDataAtCoordinateAndResolution(
bonn3857, resolutionZoom1, callback, scope, true
);
});
it('calls callback with `null` if not found', function(done) {
var callback = function(data) {
expect(arguments).to.have.length(1);
expect(data).to.be(null);
done();
};
source.forDataAtCoordinateAndResolution(
noState3857, resolutionZoom1, callback, null, true
);
});
});
});
goog.require('ol.net');
goog.require('ol.proj');
goog.require('ol.source.State');
goog.require('ol.source.TileUTFGrid');
goog.require('ol.tilegrid.TileGrid');
goog.require('ol.TileState');