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openlayers/test/spec/ol/source/imagewms.test.js

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JavaScript
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goog.require('ol.source.ImageWMS');
goog.require('ol.proj');
describe('ol.source.ImageWMS', function() {
var extent, pixelRatio, options, optionsReproj, projection, resolution;
beforeEach(function() {
extent = [10, 20, 30, 40];
pixelRatio = 1;
projection = ol.proj.get('EPSG:4326');
resolution = 0.1;
options = {
params: {
'LAYERS': 'layer'
},
ratio: 1,
url: 'http://example.com/wms'
};
optionsReproj = {
params: {
'LAYERS': 'layer'
},
ratio: 1,
url: 'http://example.com/wms',
projection: 'EPSG:3857'
};
});
describe('#getImage', function() {
it('returns the expected image URL', function() {
options.ratio = 1.5;
var source = new ol.source.ImageWMS(options);
var image = source.getImage([10, 20, 30.1, 39.9], resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
var extent = queryData.get('BBOX').split(',').map(Number);
var extentAspectRatio = (extent[3] - extent[1]) / (extent[2] - extent[0]);
var imageAspectRatio = Number(queryData.get('WIDTH') / Number(queryData.get('HEIGHT')));
expect(extentAspectRatio).to.roughlyEqual(imageAspectRatio, 1e-12);
});
it('uses correct WIDTH and HEIGHT for HiDPI devices', function() {
pixelRatio = 2;
options.serverType = 'geoserver';
var source = new ol.source.ImageWMS(options);
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
var width = Number(queryData.get('WIDTH'));
var height = Number(queryData.get('HEIGHT'));
expect(width).to.be(400);
expect(height).to.be(400);
});
it('requests integer WIDTH and HEIGHT', function() {
options.ratio = 1.5;
var source = new ol.source.ImageWMS(options);
var image = source.getImage([10, 20, 30.1, 39.9], resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
var width = parseFloat(queryData.get('WIDTH'));
var height = parseFloat(queryData.get('HEIGHT'));
expect(width).to.be(Math.round(width));
expect(height).to.be(Math.round(height));
});
it('sets WIDTH and HEIGHT to match the aspect ratio of BBOX', function() {
var source = new ol.source.ImageWMS(options);
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
expect(uri.protocol).to.be('http:');
expect(uri.hostname).to.be('example.com');
expect(uri.pathname).to.be('/wms');
var queryData = uri.searchParams;
expect(queryData.get('BBOX')).to.be('20,10,40,30');
expect(queryData.get('CRS')).to.be('EPSG:4326');
expect(queryData.get('FORMAT')).to.be('image/png');
expect(queryData.get('HEIGHT')).to.be('200');
expect(queryData.get('LAYERS')).to.be('layer');
expect(queryData.get('REQUEST')).to.be('GetMap');
expect(queryData.get('SERVICE')).to.be('WMS');
expect(queryData.get('SRS')).to.be(null);
expect(queryData.get('STYLES')).to.be('');
expect(queryData.get('TRANSPARENT')).to.be('true');
expect(queryData.get('VERSION')).to.be('1.3.0');
expect(queryData.get('WIDTH')).to.be('200');
expect(uri.hash.replace('#', '')).to.be.empty();
});
it('sets the SRS query value instead of CRS if version < 1.3', function() {
options.params.VERSION = '1.2';
var source = new ol.source.ImageWMS(options);
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('CRS')).to.be(null);
expect(queryData.get('SRS')).to.be('EPSG:4326');
});
it('allows various parameters to be overridden', function() {
options.params.FORMAT = 'image/jpeg';
options.params.TRANSPARENT = false;
var source = new ol.source.ImageWMS(options);
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('FORMAT')).to.be('image/jpeg');
expect(queryData.get('TRANSPARENT')).to.be('false');
});
it('does not add a STYLES= option if one is specified', function() {
options.params.STYLES = 'foo';
var source = new ol.source.ImageWMS(options);
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('STYLES')).to.be('foo');
});
it('changes the BBOX order for EN axis orientations', function() {
var source = new ol.source.ImageWMS(options);
projection = ol.proj.get('CRS:84');
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('BBOX')).to.be('10,20,30,40');
});
it('uses EN BBOX order if version < 1.3', function() {
options.params.VERSION = '1.1.0';
var source = new ol.source.ImageWMS(options);
var image =
source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('BBOX')).to.be('10,20,30,40');
});
it('sets MAP_RESOLUTION when the server is MapServer', function() {
options.serverType = 'mapserver';
var source = new ol.source.ImageWMS(options);
pixelRatio = 2;
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('MAP_RESOLUTION')).to.be('180');
});
it('sets FORMAT_OPTIONS when the server is GeoServer', function() {
options.serverType = 'geoserver';
var source = new ol.source.ImageWMS(options);
pixelRatio = 2;
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('FORMAT_OPTIONS')).to.be('dpi:180');
});
it('extends FORMAT_OPTIONS if it is already present', function() {
options.serverType = 'geoserver';
var source = new ol.source.ImageWMS(options);
options.params.FORMAT_OPTIONS = 'param1:value1';
pixelRatio = 2;
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('FORMAT_OPTIONS')).to.be('param1:value1;dpi:180');
});
it('rounds FORMAT_OPTIONS to an integer when the server is GeoServer',
function() {
options.serverType = 'geoserver';
var source = new ol.source.ImageWMS(options);
pixelRatio = 1.325;
var image =
source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('FORMAT_OPTIONS')).to.be('dpi:119');
});
it('sets DPI when the server is QGIS', function() {
options.serverType = 'qgis';
var source = new ol.source.ImageWMS(options);
pixelRatio = 2;
var image = source.getImage(extent, resolution, pixelRatio, projection);
var uri = new URL(image.src_);
var queryData = uri.searchParams;
expect(queryData.get('DPI')).to.be('180');
});
it('creates an image with a custom imageLoadFunction', function() {
var imageLoadFunction = sinon.spy();
options.imageLoadFunction = imageLoadFunction;
var source = new ol.source.ImageWMS(options);
var image = source.getImage(extent, resolution, pixelRatio, projection);
image.load();
expect(imageLoadFunction).to.be.called();
expect(imageLoadFunction.calledWith(image, image.src_)).to.be(true);
});
it('returns same image for consecutive calls with same args', function() {
var extent = [10.01, 20, 30.01, 40];
var source = new ol.source.ImageWMS(options);
var image1 = source.getImage(extent, resolution, pixelRatio, projection);
var image2 = source.getImage(extent, resolution, pixelRatio, projection);
expect(image1).to.equal(image2);
});
it('returns same image for calls with similar extents', function() {
options.ratio = 1.5;
var source = new ol.source.ImageWMS(options);
var extent = [10.01, 20, 30.01, 40];
var image1 = source.getImage(extent, resolution, pixelRatio, projection);
extent = [10.01, 20.1, 30.01, 40.1];
var image2 = source.getImage(extent, resolution, pixelRatio, projection);
expect(image1).to.equal(image2);
});
it('calculates correct image size with ratio', function() {
options.ratio = 1.5;
var source = new ol.source.ImageWMS(options);
var extent = [10, 5, 30, 45];
source.getImage(extent, resolution, pixelRatio, projection);
expect(source.imageSize_).to.eql([300, 600]);
});
});
describe('#getGetFeatureInfoUrl', function() {
it('returns the expected GetFeatureInfo URL', function() {
var source = new ol.source.ImageWMS(options);
var url = source.getGetFeatureInfoUrl(
[20, 30], resolution, projection,
{INFO_FORMAT: 'text/plain'});
var uri = new URL(url);
expect(uri.protocol).to.be('http:');
expect(uri.hostname).to.be('example.com');
expect(uri.pathname).to.be('/wms');
var queryData = uri.searchParams;
expect(queryData.get('BBOX')).to.be('24.95,14.95,35.05,25.05');
expect(queryData.get('CRS')).to.be('EPSG:4326');
expect(queryData.get('FORMAT')).to.be('image/png');
expect(queryData.get('HEIGHT')).to.be('101');
expect(queryData.get('I')).to.be('50');
expect(queryData.get('J')).to.be('50');
expect(queryData.get('LAYERS')).to.be('layer');
expect(queryData.get('QUERY_LAYERS')).to.be('layer');
expect(queryData.get('REQUEST')).to.be('GetFeatureInfo');
expect(queryData.get('SERVICE')).to.be('WMS');
expect(queryData.get('SRS')).to.be(null);
expect(queryData.get('STYLES')).to.be('');
expect(queryData.get('TRANSPARENT')).to.be('true');
expect(queryData.get('VERSION')).to.be('1.3.0');
expect(queryData.get('WIDTH')).to.be('101');
expect(uri.hash.replace('#', '')).to.be.empty();
});
it('returns the expected GetFeatureInfo URL when source\'s projection is different from the parameter', function() {
var source = new ol.source.ImageWMS(optionsReproj);
var url = source.getGetFeatureInfoUrl(
[20, 30], resolution, projection,
{INFO_FORMAT: 'text/plain'});
var uri = new URL(url);
expect(uri.protocol).to.be('http:');
expect(uri.hostname).to.be('example.com');
expect(uri.pathname).to.be('/wms');
var queryData = uri.searchParams;
expect(queryData.get('BBOX')).to.be('1577259.402312431,2854419.4299513334,2875520.229418512,4152680.2570574144');
expect(queryData.get('CRS')).to.be('EPSG:3857');
expect(queryData.get('FORMAT')).to.be('image/png');
expect(queryData.get('HEIGHT')).to.be('101');
expect(queryData.get('I')).to.be('50');
expect(queryData.get('J')).to.be('50');
expect(queryData.get('LAYERS')).to.be('layer');
expect(queryData.get('QUERY_LAYERS')).to.be('layer');
expect(queryData.get('REQUEST')).to.be('GetFeatureInfo');
expect(queryData.get('SERVICE')).to.be('WMS');
expect(queryData.get('SRS')).to.be(null);
expect(queryData.get('STYLES')).to.be('');
expect(queryData.get('TRANSPARENT')).to.be('true');
expect(queryData.get('VERSION')).to.be('1.3.0');
expect(queryData.get('WIDTH')).to.be('101');
expect(uri.hash.replace('#', '')).to.be.empty();
});
it('sets the QUERY_LAYERS param as expected', function() {
var source = new ol.source.ImageWMS(options);
var url = source.getGetFeatureInfoUrl(
[20, 30], resolution, projection,
{INFO_FORMAT: 'text/plain', QUERY_LAYERS: 'foo,bar'});
var uri = new URL(url);
expect(uri.protocol).to.be('http:');
expect(uri.hostname).to.be('example.com');
expect(uri.pathname).to.be('/wms');
var queryData = uri.searchParams;
expect(queryData.get('BBOX')).to.be('24.95,14.95,35.05,25.05');
expect(queryData.get('CRS')).to.be('EPSG:4326');
expect(queryData.get('FORMAT')).to.be('image/png');
expect(queryData.get('HEIGHT')).to.be('101');
expect(queryData.get('I')).to.be('50');
expect(queryData.get('J')).to.be('50');
expect(queryData.get('LAYERS')).to.be('layer');
expect(queryData.get('QUERY_LAYERS')).to.be('foo,bar');
expect(queryData.get('REQUEST')).to.be('GetFeatureInfo');
expect(queryData.get('SERVICE')).to.be('WMS');
expect(queryData.get('SRS')).to.be(null);
expect(queryData.get('STYLES')).to.be('');
expect(queryData.get('TRANSPARENT')).to.be('true');
expect(queryData.get('VERSION')).to.be('1.3.0');
expect(queryData.get('WIDTH')).to.be('101');
expect(uri.hash.replace('#', '')).to.be.empty();
});
});
});
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