45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
import _ol_reproj_ from '../../../../src/ol/reproj.js';
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import _ol_proj_ from '../../../../src/ol/proj.js';
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describe('ol.reproj', function() {
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describe('#calculateSourceResolution', function() {
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var proj3857 = _ol_proj_.get('EPSG:3857');
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var proj4326 = _ol_proj_.get('EPSG:4326');
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var origin = [0, 0];
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var point3857 = [50, 40];
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var point4326 = _ol_proj_.transform(point3857, proj3857, proj4326);
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it('is identity for identical projection', function() {
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var result;
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var resolution = 500;
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result = _ol_reproj_.calculateSourceResolution(
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proj3857, proj3857, origin, resolution);
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expect(result).to.be(resolution);
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result = _ol_reproj_.calculateSourceResolution(
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proj3857, proj3857, point3857, resolution);
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expect(result).to.be(resolution);
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result = _ol_reproj_.calculateSourceResolution(
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proj4326, proj4326, point4326, resolution);
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expect(result).to.be(resolution);
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});
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it('calculates correctly', function() {
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var resolution4326 = 5;
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var resolution3857 = _ol_reproj_.calculateSourceResolution(
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proj3857, proj4326, point4326, resolution4326);
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expect(resolution3857).not.to.be(resolution4326);
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expect(resolution3857).to.roughlyEqual(
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5 * proj4326.getMetersPerUnit(), 1e-4);
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var result = _ol_reproj_.calculateSourceResolution(
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proj4326, proj3857, point3857, resolution3857);
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expect(result).to.be(resolution4326);
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});
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});
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});
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