var vows = require(“vows”),
load = require("../load"), assert = require("../assert");
var suite = vows.describe(“d3.geo.greatArc”);
suite.addBatch({
"greatArc": { topic: load("geo/greatArc").expression("d3.geo.greatArc"), "distance": function(arc) { var a = arc(); assert.equal(a.distance({source: [0, 0], target: [0, 0]}), 0); assert.inDelta(a.distance({ source: [118 + 24 / 60, 33 + 57 / 60], target: [ 73 + 47 / 60, 40 + 38 / 60] }), 3973 / 6371, .5); }, "source and target can be set as constants": function(arc) { var a = arc().source([5, 52]).target([-120, 37]); assert.inDelta(a().coordinates, [ [ 5, 52 ], [-120, 37 ] ], .5); }, "geodesic": function(arc) { var a = arc(); assert.inDelta(a({source: [5, 52], target: [-120, 37]}).coordinates, [ [ 5, 52 ], [-120, 37 ] ], .5); } }
});
suite.export(module);