var vows = require(“vows”),
load = require("../load"), assert = require("assert");
var suite = vows.describe(“d3.geo.distance”);
suite.addBatch({
"distance": { topic: load("geo/distance").expression("d3.geo.distance"), "computes the great-arc distance": function(distance) { assert.equal(distance([0, 0], [0, 0]), 0); assert.inDelta(distance([118 + 24 / 60, 33 + 57 / 60], [ 73 + 47 / 60, 40 + 38 / 60]), 3973 / 6371, .5); }, "small distance": function(distance) { assert.isTrue(distance([0, 0], [0, 1e-12]) > 0); } }
});
suite.export(module);