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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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function test_Layer_constructor (t) {
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var options = { chicken: 151, foo: "bar", projection: "none" };
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var layer = new OpenLayers.Layer('Test Layer', options);
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t.ok( layer instanceof OpenLayers.Layer, "new OpenLayers.Layer returns object" );
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t.eq( layer.CLASS_NAME, "OpenLayers.Layer", "CLASS_NAME variable set correctly");
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t.eq( layer.name, "Test Layer", "layer.name is correct" );
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t.ok( layer.id != null, "Layer is given an id");
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t.ok( layer.projection, "none", "default layer projection correctly set");
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t.ok( ((layer.chicken == 151) && (layer.foo == "bar")), "layer.options correctly set to Layer Object" );
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t.ok( ((layer.options["chicken"] == 151) && (layer.options["foo"] == "bar")), "layer.options correctly backed up" );
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t.ok( typeof layer.div == "object" , "layer.div is created" );
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t.eq( layer.div.id, layer.id, "layer.div.id is correct" );
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options.chicken = 552;
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t.eq( layer.options["chicken"], 151 , "layer.options correctly made fresh copy" );
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t.eq( layer.isBaseLayer, false, "Default layer is not base layer" );
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layer = new OpenLayers.Layer('Test Layer');
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t.ok( layer instanceof OpenLayers.Layer, "new OpenLayers.Layer returns object" );
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t.eq( layer.name, "Test Layer", "layer.name is correct" );
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t.ok( layer.projection == null, "default layer projection correctly set");
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t.ok( layer.options instanceof Object, "layer.options correctly initialized as a non-null Object" );
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function test_Layer_clone (t) {
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var mapone = new OpenLayers.Map('map');
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var options = { chicken: 151, foo: "bar", maxResolution: "auto" };
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var layer = new OpenLayers.Layer('Test Layer', options);
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mapone.addLayer(layer);
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// randomly assigned property
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var clone = layer.clone();
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t.ok( clone.map == null, "cloned layer has map property set to null")
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var maptwo = new OpenLayers.Map('map2');
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maptwo.addLayer(clone);
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t.ok( clone instanceof OpenLayers.Layer, "new OpenLayers.Layer returns object" );
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t.eq( clone.name, "Test Layer", "default clone.name is correct" );
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t.ok( ((clone.options["chicken"] == 151) && (clone.options["foo"] == "bar")), "clone.options correctly set" );
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t.eq(clone.chocolate, 5, "correctly copied randomly assigned property");
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layer.addOptions({chicken:152});
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t.eq(clone.options["chicken"], 151, "made a clean copy of options");
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t.ok( (layer.maxResolution != clone.maxResolution), "maxresolution of clone reset to new map div");
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t.ok( (layer.minResolution != clone.minResolution), "minresolution of clone reset to new map div");
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function test_Layer_setName (t) {
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layer = new OpenLayers.Layer('Test Layer');
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layer.setName("chicken");
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t.eq(layer.name, "chicken", "setName() works")
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function test_Layer_addOptions (t) {
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var options = { chicken: 151, foo: "bar" };
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var layer = new OpenLayers.Layer('Test Layer', options);
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layer.addOptions({bark:55, chicken: 171});
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t.eq(layer.bark, 55, "addOptions() assigns new option correctly to Layer");
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t.eq(layer.options.bark, 55, "addOptions() adds new option correctly to backup");
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t.eq(layer.chicken, 171, "addOptions() overwrites option correctly to Layer");
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t.eq(layer.options.chicken, 171, "addOptions() overwrites option correctly to backup");
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function test_Layer_StandardOptionsAccessors (t) {
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var projection = "chicken";
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var maxExtent = new OpenLayers.Bounds(50,50,100,100);
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var maxResolution = 1.5726;
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var numZoomLevels = 11;
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var options = { projection: projection,
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maxExtent: maxExtent,
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maxResolution: maxResolution,
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numZoomLevels: numZoomLevels
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var layer = new OpenLayers.Layer('Test Layer', options);
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t.eq(layer.projection, projection, "projection set correctly");
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t.ok(layer.maxExtent.equals(maxExtent), "maxExtent set correctly");
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t.eq(layer.maxResolution, maxResolution, "maxResolution set correctly");
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t.eq(layer.numZoomLevels, numZoomLevels, "numZoomLevels set correctly");
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function test_eventListeners(t) {
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var method = OpenLayers.Events.prototype.on;
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// test that events.on is called at layer construction
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eventListeners: {foo: "bar"}
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OpenLayers.Events.prototype.on = function(obj) {
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t.eq(obj, options.eventListeners, "events.on called with eventListeners");
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var layer = new OpenLayers.Layer("test", options);
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OpenLayers.Events.prototype.on = method;
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// if events.on is called again, this will fail due to an extra test
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// test layer without eventListeners
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OpenLayers.Events.prototype.on = function(obj) {
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t.fail("events.on called without eventListeners");
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var layer2 = new OpenLayers.Layer("test");
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OpenLayers.Events.prototype.on = method;
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function test_Layer_initResolutions(t) {
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var map = new OpenLayers.Map("map");
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// tests for minResolution, maxResolution, and numZoomLevels
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layer = new OpenLayers.Layer("test", options);
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layer.initResolutions();
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t.eq(layer.minResolution.toPrecision(6), (1.5).toPrecision(6),
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"(with numZoomLevels) layer minResolution preserved");
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t.eq(layer.maxResolution.toPrecision(6), (10.5).toPrecision(6),
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"(with numZoomLevels) layer maxResolution preserved");
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t.eq(layer.numZoomLevels, 5, "(with numZoomLevels) layer numZoomLevels preserved");
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t.eq(layer.alwaysInRange, false, "Always in range is set to false due to passed options.")
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// three tests for minResolution, and maxResolution
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layer = new OpenLayers.Layer("test", options);
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layer.initResolutions();
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t.eq(layer.minResolution.toPrecision(6), (1.5).toPrecision(6),
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"(without numZoomLevels) layer minResolution preserved");
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t.eq(layer.maxResolution.toPrecision(6), (10.5).toPrecision(6),
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"(without numZoomLevels) layer maxResolution preserved");
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t.eq(layer.numZoomLevels, 3, "(without numZoomLevels) layer numZoomLevels calculated");
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// three tests for minScale, maxScale, and numZoomLevels
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layer = new OpenLayers.Layer("test", options);
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layer.initResolutions();
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t.eq(layer.minScale.toPrecision(6), (105).toPrecision(6),
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"(with numZoomLevels) layer minScale preserved");
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t.eq(layer.maxScale.toPrecision(6), (15).toPrecision(6),
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"(with numZoomLevels) layer maxScale preserved");
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t.eq(layer.numZoomLevels, 10, "(with numZoomLevels) layer numZoomLevels preserved");
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// three tests for minScale, and maxScale
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layer = new OpenLayers.Layer("test", options);
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layer.initResolutions();
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t.eq(layer.minScale.toPrecision(6), (1555).toPrecision(6),
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"(without numZoomLevels) layer minScale preserved");
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t.eq(layer.maxScale.toPrecision(6), (155).toPrecision(6),
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"(without numZoomLevels) layer maxScale preserved");
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t.eq(layer.numZoomLevels, 4, "(without numZoomLevels) layer numZoomLevels calculated");
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layer = new OpenLayers.Layer("test", {'projection': 'EPSG:4326', 'map': map});
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layer.initResolutions();
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t.eq(layer.alwaysInRange, true, "always in range true if only get projection.");
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OpenLayers.Layer.prototype.alwaysInRange = false;
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layer = new OpenLayers.Layer("test", {'projection': 'EPSG:4326', 'map': map});
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layer.initResolutions();
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t.eq(layer.alwaysInRange, false, "always in range true if overridden on prototype.");
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OpenLayers.Layer.prototype.alwaysInRange = null;
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function test_Layer_visibility(t) {
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var layer = new OpenLayers.Layer('Test Layer');
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t.eq(layer.getVisibility(), true, "default for layer creation is visible");
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layer.setVisibility(false);
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t.eq(layer.getVisibility(), false, "setVisibility false works");
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layer.setVisibility(true);
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t.eq(layer.getVisibility(), true, "setVisibility true works");
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// Need a map in order to have moveTo called.
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// Tests added for #654.
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var layer = new OpenLayers.Layer.WMS('Test Layer','http://example.com');
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var m = new OpenLayers.Map('map');
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layer.moveTo = function() { layermoved = true; }
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layer.events.register('visibilitychanged', t, function() {
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this.ok(true, "Visibility changed calls layer event.");
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layer.setVisibility(false);
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t.eq(layermoved, false, "Layer didn't move when calling setvis false");
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layer.setVisibility(true);
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t.eq(layermoved, true, "Layer moved when calling setvis true.");
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function test_Layer_getZoomForResolution(t) {
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var layer = new OpenLayers.Layer('Test Layer');
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//make some dummy resolutions
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layer.resolutions = [128, 64, 32, 16, 8, 4, 2];
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t.eq(layer.getZoomForResolution(200), 0, "zoom all the way out");
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t.eq(layer.getZoomForResolution(25), 2, "zoom in middle");
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t.eq(layer.getZoomForResolution(3), 5, "zoom allmost all the way in");
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t.eq(layer.getZoomForResolution(1), 6, "zoom all the way in");
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t.eq(layer.getZoomForResolution(65), 0, "smallest containing res");
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t.eq(layer.getZoomForResolution(63), 1, "smallest containing res");
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t.eq(layer.getZoomForResolution(65, true), 1, "closest res");
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t.eq(layer.getZoomForResolution(63, true), 1, "closest res");
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layer.map.fractionalZoom = true;
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t.eq(layer.getZoomForResolution(64), 1,
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"(fractionalZoom) correct zoom for res in array");
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t.eq(layer.getZoomForResolution(48).toPrecision(6), (1.5).toPrecision(6),
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"(fractionalZoom) linear scaling for res between entries");
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t.eq(layer.getZoomForResolution(200).toPrecision(6), (0).toPrecision(6),
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"(fractionalZoom) doesn't return zoom below zero");
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t.eq(layer.getZoomForResolution(1).toPrecision(6), (layer.resolutions.length - 1).toPrecision(6),
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"(fractionalZoom) doesn't return zoom above highest index");
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function test_Layer_redraw(t) {
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var name = 'Test Layer';
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var url = "http://octo.metacarta.com/cgi-bin/mapserv";
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var params = { map: '/mapdata/vmap_wms.map',
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format: 'image/jpeg'};
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var layer = new OpenLayers.Layer.WMS(name, url, params);
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t.ok(!layer.redraw(),
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"redraw on an orphan layer returns false");
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var map = new OpenLayers.Map('map');
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t.ok(!layer.redraw(),
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"redraw returns false if map does not yet have a center");
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map.zoomToMaxExtent();
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"redraw returns true after map has a center");
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layer.setVisibility(false);
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t.ok(!layer.redraw(),
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"redraw returns false if a layer is not visible");
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layer.setVisibility(true);
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"redraw returns true even if extent has not changed");
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layer.moveTo = function(bounds, zoomChanged, dragging) {
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var extent = layer.map.getExtent();
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t.ok(bounds.equals(extent),
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"redraw calls moveTo with the map extent");
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"redraw calls moveTo with zoomChanged true");
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"redraw calls moveTo with dragging false");
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function test_layer_setIsBaseLayer(t) {
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var map = new OpenLayers.Map('map');
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layer = new OpenLayers.Layer();
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map.events.register("changebaselayer", t, function() {
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this.ok(true, "setIsBaseLayer() trig changebaselayer event.")
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layer.setIsBaseLayer(true);
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t.ok(layer.isBaseLayer, "setIsBaseLayer() change isBaseLayer property.");
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function test_layer_setTileSize(t) {
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layer = new OpenLayers.Layer();
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g_MapTileSize = new OpenLayers.Size(25,67);
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getTileSize: function() {
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return g_MapTileSize;
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var layerTileSize = new OpenLayers.Size(1,1);
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layer.tileSize = layerTileSize;
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var size = new OpenLayers.Size(2,2);
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layer.setTileSize(size);
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t.ok(layer.tileSize.equals(size), "size paramater set correctly to layer's tile size");
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t.ok(layer.imageOffset == null, "imageOffset and imageSize null when no gutters")
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layer.tileSize = layerTileSize;
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t.ok(layer.tileSize.equals(layerTileSize), "layer's tileSize property preserved if no parameter sent in");
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layer.tileSize = null;
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t.ok(layer.tileSize.equals(g_MapTileSize), "layer's tileSize property is null and so correctly taken from the map");
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size = new OpenLayers.Size(10,100);
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layer.setTileSize(size);
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var desiredImageOffset = new OpenLayers.Pixel(-15, -15);
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var desiredImageSize = new OpenLayers.Size(40, 130);
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t.ok(layer.imageOffset.equals(desiredImageOffset), "image offset correctly calculated");
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t.ok(layer.imageSize.equals(desiredImageSize), "image size correctly calculated");
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function test_Layer_getResolution(t) {
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var layer = new OpenLayers.Layer("test");
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getZoom: function() {return "foo";}
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layer.getResolutionForZoom = function(zoom) {
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t.eq(zoom, "foo", "getResolution calls getResolutionForZoom");
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layer.getResolution();
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function test_Layer_getResolutionForZoom(t) {
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var layer = new OpenLayers.Layer("test");
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layer.map = {fractionalZoom: false};
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layer.resolutions = ["zero", "one", "two"];
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t.eq(layer.getResolutionForZoom(0), "zero",
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"(fractionalZoom false) returns resolution for given index");
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t.eq(layer.getResolutionForZoom(0.9), "one",
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"(fractionalZoom false) returns resolution for float index");
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layer.resolutions = [2, 4, 6, 8];
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layer.map.fractionalZoom = true;
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t.eq(layer.getResolutionForZoom(1).toPrecision(6), (4).toPrecision(6),
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"(fractionalZoom true) returns resolution for integer zoom");
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t.eq(layer.getResolutionForZoom(1.5).toPrecision(6), (5).toPrecision(6),
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"(fractionalZoom true) returns resolution for float zoom");
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t.eq(layer.getResolutionForZoom(3.5).toPrecision(6), (8).toPrecision(6),
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"(fractionalZoom true) returns resolution for zoom beyond res length - 1");
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* HERE IS WHERE SOME TESTS SHOULD BE PUT TO CHECK ON THE LONLAT-PX TRANSLATION
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* FUNCTIONS AND RESOLUTION AND GETEXTENT GETZOOMLEVEL, ETC
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function test_Layer_destroy (t) {
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var map = new OpenLayers.Map('map');
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layer = new OpenLayers.Layer('Test Layer');
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t.eq( layer.name, null, "layer.name is null after destroy" );
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t.eq( layer.div, null, "layer.div is null after destroy" );
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t.eq( layer.map, null, "layer.map is null after destroy" );
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t.eq( layer.options, null, "layer.options is null after destroy" );
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t.eq(map.layers.length, 0, "layer removed from map");
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<div id="map" style="width:500px;height:500px"></div>
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<div id="map2" style="width:100px;height:100px"></div>