test_Scale.html
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<html>
<head>
<script src="../../lib/OpenLayers.js"></script>
<script type="text/javascript"><!--
var map;
function test_01_Control_Scale_constructor (t) {
t.plan( 1 );
control = new OpenLayers.Control.Scale();
t.ok( control instanceof OpenLayers.Control.Scale, "new OpenLayers.Control returns object" );
}
function test_02_Control_Scale_updateScale (t) {
t.plan( 4 );
control = new OpenLayers.Control.Scale('scale');
t.ok( control instanceof OpenLayers.Control.Scale, "new OpenLayers.Control returns object" );
map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.WMS('Test Layer', "http://octo.metacarta.com/cgi-bin/mapserv", {map: '/mapdata/vmap_wms.map', layers: 'basic', format: 'image/jpeg'});
map.addLayer(layer);
map.zoomTo(0);
map.addControl(control);
t.eq(OpenLayers.Util.getElement('scale').innerHTML, "Scale = 1 : 443M", "Scale set by default." );
map.zoomIn();
t.eq(OpenLayers.Util.getElement('scale').innerHTML, "Scale = 1 : 221M", "Zooming in changes scale" );
map.baseLayer.resolutions = [OpenLayers.Util.getResolutionFromScale(110)];
map.zoomTo(0);
t.eq(OpenLayers.Util.getElement('scale').innerHTML, "Scale = 1 : 110", "Scale of 100 isn't rounded" );
}
function test_03_Control_Scale_internalScale (t) {
t.plan(2);
control = new OpenLayers.Control.Scale();
t.ok( control instanceof OpenLayers.Control.Scale, "new OpenLayers.Control returns object" );
map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.WMS('Test Layer', "http://octo.metacarta.com/cgi-bin/mapserv", {map: '/mapdata/vmap_wms.map', layers: 'basic', format: 'image/jpeg'});
map.addLayer(layer);
map.zoomTo(0);
map.addControl(control);
t.eq(control.div.firstChild.innerHTML, "Scale = 1 : 443M", "Internal scale displayed properly.");
}
// -->
</script>
</head>
<body>
<a id="scale" href="">Scale</a> <br />
<div id="map" style="width: 1024px; height: 512px;"/>
</body>
</html>