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added getScaleFromResolution() function to util, also added tests for both directions of the scale<->resolution tranformation functions, as well as the normalizeScale() function

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@1534 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
euzuro
2006-10-03 03:21:45 +00:00
parent 642c438c2c
commit a758efb2f2
2 changed files with 54 additions and 0 deletions
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34
tests/test_Util.html
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@@ -418,6 +418,40 @@
}
function test_13_Util_normalizeScale(t) {
t.plan(2);
//normal scale
var scale = 1/5;
t.eq( OpenLayers.Util.normalizeScale(scale), scale, "normalizing a normal scale does nothing");
//funky scale
var scale = 5;
t.eq( OpenLayers.Util.normalizeScale(scale), 1/5, "normalizing a wrong scale works!");
}
function test_13_Util_getScaleResolutionTranslation(t) {
t.plan(4);
var scale = 1/150000000;
var resolution = OpenLayers.Util.getResolutionFromScale(scale);
t.eq(resolution.toFixed(6), "0.476217", "Calculated correct resolution for " + scale);
var scale = 1/150000000;
var resolution = OpenLayers.Util.getResolutionFromScale(scale, 'm');
t.eq(resolution.toFixed(6), "52916.638092", "Calculated correct resolution for " + scale);
scale = 150000000;
resolution = OpenLayers.Util.getResolutionFromScale(scale);
t.eq(resolution.toFixed(6), "0.476217", "Calculated correct resolution for " + scale);
scale = 1/150000000;
resolution = OpenLayers.Util.getResolutionFromScale(scale);
t.eq(OpenLayers.Util.getScaleFromResolution(resolution), scale, "scale->resolution->scale works");
}
// -->
</script>