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The default behaviour is to overzoom overlays past their max scaleExtent. When 'overzoom':false is defined in imagery.json, the layer will disappear on the max scaleExtent.
51 lines
2.1 KiB
JavaScript
51 lines
2.1 KiB
JavaScript
describe('iD.BackgroundSource', function() {
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it('does not error with blank template', function() {
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var source = iD.BackgroundSource({ template: '' });
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expect(source.url([0,1,2])).to.equal('');
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});
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it('generates a tile-generating source', function() {
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var source = iD.BackgroundSource({ template: '{z}/{x}/{y}' });
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expect(source.url([0,1,2])).to.equal('2/0/1');
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});
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it('supports subdomains', function() {
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var source = iD.BackgroundSource({ template: '{switch:a,b}/{z}/{x}/{y}'});
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expect(source.url([0,1,2])).to.equal('b/2/0/1');
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});
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it('distributes requests between subdomains', function() {
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var source = iD.BackgroundSource({ template: '{switch:a,b}/{z}/{x}/{y}' });
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expect(source.url([0,1,1])).to.equal('b/1/0/1');
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expect(source.url([0,2,1])).to.equal('a/1/0/2');
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});
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it('correctly displays an overlay with no overzoom specified', function() {
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var source = iD.BackgroundSource({ scaleExtent: [6,16] });
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expect(source.validZoom(10)).to.be.true;
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expect(source.validZoom(3)).to.be.false;
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expect(source.validZoom(17)).to.be.true;
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});
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it('correctly displays an overlay with an invalid overzoom', function() {
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var source = iD.BackgroundSource({ scaleExtent: [6,16], overzoom: 'gibberish'});
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expect(source.validZoom(10)).to.be.true;
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expect(source.validZoom(3)).to.be.false;
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expect(source.validZoom(17)).to.be.true;
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});
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it('correctly displays an overlay with overzoom:true', function() {
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var source = iD.BackgroundSource({ scaleExtent: [6,16], overzoom: true});
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expect(source.validZoom(10)).to.be.true;
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expect(source.validZoom(3)).to.be.false;
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expect(source.validZoom(17)).to.be.true;
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});
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it('correctly displays an overlay with overzoom:false', function() {
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var source = iD.BackgroundSource({ scaleExtent: [6,16], overzoom: false});
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expect(source.validZoom(10)).to.be.true;
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expect(source.validZoom(3)).to.be.false;
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expect(source.validZoom(17)).to.be.false;
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});
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});
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