var vows = require(“vows”),

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

var suite = vows.describe(“d3.time.years”);

suite.addBatch({

"years": {
  topic: load("time/year").expression("d3.time.years"),
  "returns years": function(range) {
    assert.deepEqual(range(local(2010, 0, 1), local(2013, 0, 1)), [
      local(2010, 0, 1),
      local(2011, 0, 1),
      local(2012, 0, 1)
    ]);
  },
  "has an inclusive lower bound": function(range) {
    assert.deepEqual(range(local(2010, 0, 1), local(2013, 0, 1))[0], local(2010, 0, 1));
  },
  "has an exclusive upper bound": function(range) {
    assert.deepEqual(range(local(2010, 0, 1), local(2013, 0, 1))[2], local(2012, 0, 1));
  },
  "can skip years": function(range) {
    assert.deepEqual(range(local(2009, 0, 1), local(2029, 0, 1), 5), [
      local(2010, 0, 1),
      local(2015, 0, 1),
      local(2020, 0, 1),
      local(2025, 0, 1)
    ]);
  },
  "UTC": {
    topic: function(range) {
      return range.utc;
    },
    "returns years": function(range) {
      assert.deepEqual(range(utc(2010, 0, 1), utc(2013, 0, 1)), [
        utc(2010, 0, 1),
        utc(2011, 0, 1),
        utc(2012, 0, 1)
      ]);
    },
    "has an inclusive lower bound": function(range) {
      assert.deepEqual(range(utc(2010, 0, 1), utc(2013, 0, 1))[0], utc(2010, 0, 1));
    },
    "has an exclusive upper bound": function(range) {
      assert.deepEqual(range(utc(2010, 0, 1), utc(2013, 0, 1))[2], utc(2012, 0, 1));
    },
    "can skip years": function(range) {
      assert.deepEqual(range(utc(2009, 0, 1), utc(2029, 0, 1), 5), [
        utc(2010, 0, 1),
        utc(2015, 0, 1),
        utc(2020, 0, 1),
        utc(2025, 0, 1)
      ]);
    }
  }
}

});

function local(year, month, day, hours, minutes, seconds, milliseconds) {

var date = new Date();
date.setFullYear(year, month, day);
date.setHours(hours || 0, minutes || 0, seconds || 0, milliseconds || 0);
return date;

}

function utc(year, month, day, hours, minutes, seconds, milliseconds) {

var date = new Date();
date.setUTCFullYear(year, month, day);
date.setUTCHours(hours || 0, minutes || 0, seconds || 0, milliseconds || 0);
return date;

}

suite.export(module);