require("../env");

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

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

var vows = require("vows"),

    assert = require("assert");

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

suite.addBatch({

  "years": {

    topic: function() {

      return 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) {

  return new Date(year, month, day, hours || 0, minutes || 0, seconds || 0);

}

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

  return new Date(Date.UTC(year, month, day, hours || 0, minutes || 0, seconds || 0));

}

suite.export(module);