var vows = require(“vows”),

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

var suite = vows.describe(“d3.geo.rotation”);

suite.addBatch({

"rotation": {
  topic: load("geo/rotation").expression("d3.geo.rotation"),
  "a rotation of [+90°, 0°]": {
    topic: function(rotation) {
      return rotation([90, 0]);
    },
    "only rotates longitude": function(rotation) {
      assert.inDelta(rotation([0, 0]), [90, 0], 1e-6);
    },
    "wraps around when crossing the antimeridian": function(rotation) {
      assert.inDelta(rotation([150, 0]), [-120, 0], 1e-6);
    }
  },
  "a rotation of [-45°, -45°]": {
    topic: function(rotation) {
      return rotation([-45, 45]);
    },
    "rotates longitude and latitude": function(rotation) {
      assert.inDelta(rotation([0, 0]), [-54.73561, 30], 1e-6);
    },
    "inverse rotation of longitude and latitude": function(rotation) {
      assert.inDelta(rotation.invert([-54.73561, 30]), [0, 0], 1e-6);
    }
  }
}

});

suite.export(module);