Test the demo utfgrid file (currently failing).

2012-02-27 16:48:33 -07:00
parent fd595e6282
commit 0aa8705299
2 changed files with 78 additions and 0 deletions
@@ -1,5 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-9">
  <script src="../OLLoader.js"></script>
  <script type="text/javascript">
@@ -194,6 +196,81 @@
            tearDown();
        });
    }
    function test_getFeatureId_demo(t) {
        /**
         * The UTFGrid 1.2 spec (https://github.com/mapbox/utfgrid-spec/blob/master/1.2/utfgrid.md)
         * links to a demo.json to be used for testing implementations.  This
         * file is constructed with 256x256 data points.  Each data point maps
         * to a "feature id" using this heuristic:
         *
         *     // x and y are pixel offsets from top left of 256x256 tile
         *     if (y < 255 || x < 222) {
         *         id = (y * 256) + x
         *     } else {
         *         id = 65501; // max number of ids that can be encoded
         *     }
         */
        t.plan(1);
        setUp();
        // look at this beauty of a constructor
        var tile = new OpenLayers.Tile.UTFGrid(
            layer, // layer
            new OpenLayers.Pixel(0, 0), // position
            new OpenLayers.Bounds(0, 0, 256, 256), // bounds
            "../data/utfgrid/demo-1.1.json", // url
            new OpenLayers.Size(256, 256), // size
            {utfgridResolution: 1} // options
        );
        var err;        
        var request = new OpenLayers.Request.GET({
            url: tile.url,
            success: function(req) {
                try {
                    tile.parseData(req.responseText);
                } catch (e) {
                    err = e;
                }
            },
            failure: function(req) {
                err = new Error("Failed to fetch json.  Status: " + req.status);
            }
        });
        // wait for response and parsing, then make assertions
        t.delay_call(1, function() {
            if (err) {
                t.fail(err);
            } else {
                var got, exp, failure;
                outer: for (var y=0; y<256; ++y) {
                    for (var x=0; x<256; ++x) {
                        if (y<255 || x<222) {
                            exp = String((y * 256) + x);
                        } else {
                            exp = "65501";
                        }
                        got = tile.getFeatureId(x, y);
                        if (got !== exp) {
                            failure = "Failed to get id for (" + x + ", " + y + "): " +
                                "got " + got + " but expected " + exp;
                            break outer;
                        }
                    }
                }
                if (!failure) {
                    t.ok(true, "resolved feature ids for all data points");
                } else {
                    t.fail(failure);
                }
            }
            tearDown();
        });
    }
  </script>
 </head>