test_Layer_Grid.html
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<html>
<head>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript"><!--
var isMozilla = (navigator.userAgent.indexOf("compatible") == -1);
var layer;
var name = 'Test Layer';
var url = "http://octo.metacarta.com/cgi-bin/mapserv";
var params = { map: '/mapdata/vmap_wms.map',
layers: 'basic',
format: 'image/png'};
/**
* NOTE TO READER:
*
* Some of the tests on the Grid class actually use the WMS class.
* This is because WMS is a subclass of Grid and it implements the
* core functions which are necessary to test the tile-generation
* mechanism.
*
*/
function test_01_Layer_Grid_constructor (t) {
t.plan( 1 );
layer = new OpenLayers.Layer.Grid(name, url, params, null);
t.ok( layer instanceof OpenLayers.Layer.Grid, "returns OpenLayers.Layer.Grid object" );
}
function test_02_Layer_Grid_inittiles (t) {
t.plan( 2 );
var map = new OpenLayers.Map($('map'));
layer = new OpenLayers.Layer.WMS(name, url, params);
map.addLayer(layer);
map.setCenter(new OpenLayers.LonLat(0,0),5);
t.eq( layer.grid.length, 7, "Grid rows is correct." );
t.eq( layer.grid[0].length, 6, "Grid cols is correct." );
}
function test_03_Layer_Grid_clearTiles (t) {
t.plan(1);
var map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.WMS(name, url, params);
map.addLayer(layer);
map.setCenter(new OpenLayers.LonLat(0,0));
//grab a reference to one of the tiles
var tile = layer.grid[0][0];
layer.clearGrid();
t.ok( layer.grid != null, "layer.grid does not get nullified" );
}
function test_04_Layer_Grid_getGridBounds(t) {
t.plan( 1 );
layer = new OpenLayers.Layer.WMS(name, url, params);
var bl = { bounds: new OpenLayers.Bounds(1,2,0,0)};
var tr = { bounds: new OpenLayers.Bounds(0,0,3,4)};
layer.grid = [ [6, tr],
[bl, 7]];
var bounds = layer.getGridBounds();
var testBounds = new OpenLayers.Bounds(1,2,3,4);
t.ok( bounds.equals(testBounds), "getGridBounds() returns correct bounds")
layer.grid = null;
}
function test_05_Layer_Grid_getResolution(t) {
t.plan( 1 );
var map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.WMS(name, url, params);
map.addLayer(layer);
map.zoom = 5;
t.eq( layer.getResolution(), 0.0439453125, "getResolution() returns correct value");
}
function test_06_Layer_Grid_getZoomForExtent(t) {
t.plan( 2 );
var bounds, zoom;
var map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.WMS(name, url, params);
map.addLayer(layer);
bounds = new OpenLayers.Bounds(10,10,12,12);
zoom = layer.getZoomForExtent(bounds);
t.eq( zoom, 8, "getZoomForExtent() returns correct value");
bounds = new OpenLayers.Bounds(10,10,100,100);
zoom = layer.getZoomForExtent(bounds);
t.eq( zoom, 2, "getZoomForExtent() returns correct value");
}
/** THIS WOULD BE WHERE THE TESTS WOULD GO FOR
*
* -moveTo
* -insertColumn
* -insertRow
function 07_Layer_Grid_moveTo(t) {
}
function 08_Layer_Grid_insertColumn(t) {
}
function 09_Layer_Grid_insertRow(t) {
}
*
*/
function test_10_Layer_Grid_clone(t) {
t.plan(5);
var options = {tileSize: new OpenLayers.Size(500,50)};
var map = new OpenLayers.Map('map', options);
layer = new OpenLayers.Layer.Grid(name, url, params);
map.addLayer(layer);
layer.grid = [ [6, 7],
[8, 9]];
var clone = layer.clone();
t.ok( clone.grid != layer.grid, "clone does not copy grid");
t.ok( clone.grid.length == 0, "clone creates a new array instead");
t.ok( clone.tileSize.equals(layer.tileSize), "tileSize correctly cloned");
layer.tileSize.w += 40;
t.eq( clone.tileSize.w, 500, "changing layer.tileSize does not change clone.tileSize -- a fresh copy was made, not just copied reference");
t.eq( clone.alpha, layer.alpha, "alpha copied correctly");
layer.grid = null;
}
function test_11_Layer_Grid_setMap(t) {
t.plan(2);
var options = {tileSize: new OpenLayers.Size(500,50)};
var map = new OpenLayers.Map('map', options);
layer = new OpenLayers.Layer.Grid(name, url, params);
layer.setMap(map);
t.ok( layer.tileSize != null, "tileSize has been set");
t.ok( (layer.tileSize.h == 50) && (layer.tileSize.w == 500), "tileSize has been set correctly");
}
function test_99_Layer_Grid_destroy (t) {
t.plan( 3 );
var map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.Grid(name, url, params);
map.addLayer(layer);
layer.destroy();
t.eq( layer.grid, null, "layer.grid is null after destroy" );
t.eq( layer.tileSize, null, "layer.tileSize is null after destroy" );
//test with tile creation
layer = new OpenLayers.Layer.WMS(name, url, params);
map.addLayer(layer);
map.setCenter(new OpenLayers.LonLat(0,0), 5);
//grab a reference to one of the tiles
var tile = layer.grid[0][0];
layer.destroy();
t.ok( layer.grid == null, "tiles appropriately destroyed")
}
// -->
</script>
</head>
<body>
<div id="map" style="width:500px;height:550px;display:none"></div>
</body>
</html>