74 lines
1.8 KiB
JavaScript
74 lines
1.8 KiB
JavaScript
goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('goog.testing.jsunit');
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goog.require('ol.Coordinate');
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goog.require('ol.Extent');
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goog.require('ol.Projection');
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goog.require('ol.TileGrid');
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goog.require('ol.TileLayer');
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goog.require('ol.TileStore');
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goog.require('ol.TileUrlFunction');
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goog.require('ol.dom.Map');
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goog.require('ol.dom.TileLayerRenderer');
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var tileLayerRenderer;
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function setUp() {
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var map = new ol.dom.Map(
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goog.dom.createElement(goog.dom.TagName.DIV));
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var resolutions = [100, 80, 50, 10, 1, 0.1];
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var extent = new ol.Extent(0, 0, 100000, 100000);
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var origin = new ol.Coordinate(0, 0);
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var tileGrid = new ol.TileGrid(resolutions, extent, origin);
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var projection = ol.Projection.getFromCode('EPSG:3857');
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var tileUrlFunction = ol.TileUrlFunction.createFromTemplate('{z}/{x}/{y}');
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var tileStore = new ol.TileStore(projection, tileGrid, tileUrlFunction);
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var tileLayer = new ol.TileLayer(tileStore);
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tileLayerRenderer = new ol.dom.TileLayerRenderer(
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map, tileLayer,
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goog.dom.createElement(goog.dom.TagName.DIV));
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}
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function testGetPreferredZ() {
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var z;
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// gets the max resolution.
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z = tileLayerRenderer.getPreferredZ_(100);
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assertEquals(0, z);
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// gets the min resolution.
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z = tileLayerRenderer.getPreferredZ_(0.1);
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assertEquals(5, z);
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// gets the max when bigger.
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z = tileLayerRenderer.getPreferredZ_(200);
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assertEquals(0, z);
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// gets the min when smaller.
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z = tileLayerRenderer.getPreferredZ_(0.01);
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assertEquals(5, z);
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// gets the first when in the middle.
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z = tileLayerRenderer.getPreferredZ_(90);
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assertEquals(0, z);
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// gets the closer when elsewhere.
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z = tileLayerRenderer.getPreferredZ_(89);
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assertEquals(1, z);
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z = tileLayerRenderer.getPreferredZ_(49);
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assertEquals(2, z);
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z = tileLayerRenderer.getPreferredZ_(0.5);
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assertEquals(5, z);
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}
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