transverse-mercator-test.js

var vows = require("vows"),
    assert = require("./assert"),
    load = require("./load");

var suite = vows.describe("d3.geo.transverseMercator");

suite.addBatch({
  "transverseMercator": {
    topic: load("transverse-mercator"),
    "default": {
      topic: function(geo) { return geo.transverseMercator(); },
      "projections and inverse projections": function(transverseMercator) {
        assert.equalInverse(transverseMercator, [  0,   0], [480,        250]);
        assert.equalInverse(transverseMercator, [  0, -45], [480,        367.809724]);
        assert.equalInverse(transverseMercator, [  0,  45], [480,        132.190275]);
        assert.equalInverse(transverseMercator, [-90,   0], [-Infinity,  250]);
        assert.equalInverse(transverseMercator, [ 90,   0], [ Infinity,  250]);
        assert.equalInverse(transverseMercator, [-80,  15], [203.284019, 100.632486]);
        assert.equalInverse(transverseMercator, [  1,   1], [482.617727, 247.381607]);
        assert.equalInverse(transverseMercator, [ 15,  45], [507.764703, 129.590678]);
        assert.equalInverse(transverseMercator, [  0,  90], [480,         14.380550]);
        assert.equalInverse(transverseMercator, [  0, -90], [480,        485.619449]);
        assert.equalInverse(transverseMercator, [180,   0], [480,       -221.238898]);
      }
    }
  }
});

suite.export(module);