80 lines
2.5 KiB
JavaScript
80 lines
2.5 KiB
JavaScript
describe("ol.renderer.TileLayerRenderer", function() {
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it("is supported in this environment", function() {
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// this will not always be true, but for now we expect it to be so
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expect(ol.renderer.TileLayerRenderer.isSupported()).toBe(true);
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});
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it("handles tile layers", function() {
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var xyz = new ol.layer.XYZ();
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expect(ol.renderer.TileLayerRenderer.canRender(xyz)).toBe(true);
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});
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it("doesn't handle arbitrary layers", function() {
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var layer = new ol.layer.Layer();
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expect(ol.renderer.TileLayerRenderer.canRender(layer)).toBe(false);
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});
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it("returns a string type", function() {
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expect(ol.renderer.TileLayerRenderer.getType()).toBe("tile");
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});
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describe("getPreferredResAndZ_", function() {
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var layer = new ol.layer.XYZ();
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var resolutions = [100, 80, 50, 10, 1, 0.1];
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layer.setResolutions(resolutions);
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var container = document.createElement("div");
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var renderer = new ol.renderer.TileLayerRenderer(container, layer);
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it("gets the max resolution", function() {
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var pair = renderer.getPreferredResAndZ_(100);
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expect(pair[0]).toBe(100);
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expect(pair[1]).toBe(0);
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});
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it("gets the min resolution", function() {
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var pair = renderer.getPreferredResAndZ_(0.1);
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expect(pair[0]).toBe(0.1);
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expect(pair[1]).toBe(5);
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});
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it("gets the max when bigger", function() {
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var pair = renderer.getPreferredResAndZ_(200);
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expect(pair[0]).toBe(100);
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expect(pair[1]).toBe(0);
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});
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it("gets the min when smaller", function() {
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var pair = renderer.getPreferredResAndZ_(0.01);
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expect(pair[0]).toBe(0.1);
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expect(pair[1]).toBe(5);
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});
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it("gets the first when in the middle", function() {
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var pair = renderer.getPreferredResAndZ_(90);
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expect(pair[0]).toBe(100);
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expect(pair[1]).toBe(0);
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});
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it("gets the closer when elsewhere", function() {
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var pair = renderer.getPreferredResAndZ_(89);
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expect(pair[0]).toBe(80);
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expect(pair[1]).toBe(1);
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pair = renderer.getPreferredResAndZ_(49);
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expect(pair[0]).toBe(50);
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expect(pair[1]).toBe(2);
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pair = renderer.getPreferredResAndZ_(0.5);
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expect(pair[0]).toBe(0.1);
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expect(pair[1]).toBe(5);
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});
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});
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});
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