require("../env");

require("../../d3");

require("../../d3.geo");

var vows = require("vows"),

    assert = require("assert");

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

suite.addBatch({

  "greatArc": {

    topic: function() {

      return d3.geo.greatArc();

    },

    "distance": function(arc) {

      assert.equal(arc.distance({source: [0, 0], target: [0, 0]}), 0);

      assert.inDelta(arc.distance({

        source: [118 + 24 / 60, 33 + 57 / 60],

        target: [ 73 + 47 / 60, 40 + 38 / 60]

      }), 3973 / 6371, .5);

    },

    "geodesic": function(arc) {

      assert.inDelta(arc.precision(7.2)({source: [5, 52], target: [-120, 37]}).coordinates, [

        [   5,        52      ],

        [  -3.805036, 57.05083],

        [ -15.122869, 61.30118],

        [ -29.396213, 64.34584],

        [ -46.132729, 65.72409],

        [ -63.394401, 65.15597],

        [ -78.854311, 62.76337],

        [ -91.401599, 58.96701],

        [-101.190927, 54.21333],

        [-108.843633, 48.83586],

        [-114.961152, 43.05231],

        [-120,        37      ]

      ], .5);

    }

  }

});

suite.export(module);