var vows = require(“vows”),

load = require("../load"),
assert = require("../assert"),
time = require("./time"),
local = time.local,
utc = time.utc;

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

suite.addBatch({

"months": {
  topic: load("time/month").expression("d3.time.months"),
  "returns months": function(range) {
    assert.deepEqual(range(local(2010, 10, 31), local(2011, 2, 1)), [
      local(2010, 11, 1),
      local(2011, 0, 1),
      local(2011, 1, 1)
    ]);
  },
  "has an inclusive lower bound": function(range) {
    assert.deepEqual(range(local(2010, 10, 31), local(2011, 2, 1))[0], local(2010, 11, 1));
  },
  "has an exclusive upper bound": function(range) {
    assert.deepEqual(range(local(2010, 10, 31), local(2011, 2, 1))[2], local(2011, 1, 1));
  },
  "can skip months": function(range) {
    assert.deepEqual(range(local(2011, 1, 1), local(2012, 1, 1), 3), [
      local(2011, 3, 1),
      local(2011, 6, 1),
      local(2011, 9, 1),
      local(2012, 0, 1)
    ]);
  },
  "observes start of daylight savings time": function(range) {
    assert.deepEqual(range(local(2011, 0, 1), local(2011, 4, 1)), [
      local(2011, 0, 1),
      local(2011, 1, 1),
      local(2011, 2, 1),
      local(2011, 3, 1)
    ]);
  },
  "observes end of daylight savings time": function(range) {
    assert.deepEqual(range(local(2011, 9, 1), local(2012, 1, 1)), [
      local(2011, 9, 1),
      local(2011, 10, 1),
      local(2011, 11, 1),
      local(2012, 0, 1)
    ]);
  },
  "UTC": {
    topic: function(range) {
      return range.utc;
    },
    "returns months": function(range) {
      assert.deepEqual(range(utc(2010, 10, 31), utc(2011, 2, 1)), [
        utc(2010, 11, 1),
        utc(2011, 0, 1),
        utc(2011, 1, 1)
      ]);
    },
    "has an inclusive lower bound": function(range) {
      assert.deepEqual(range(utc(2010, 10, 31), utc(2011, 2, 1))[0], utc(2010, 11, 1));
    },
    "has an exclusive upper bound": function(range) {
      assert.deepEqual(range(utc(2010, 10, 31), utc(2011, 2, 1))[2], utc(2011, 1, 1));
    },
    "can skip months": function(range) {
      assert.deepEqual(range(utc(2011, 1, 1), utc(2012, 1, 1), 3), [
        utc(2011, 3, 1),
        utc(2011, 6, 1),
        utc(2011, 9, 1),
        utc(2012, 0, 1)
      ]);
    },
    "does not observe the start of daylight savings time": function(range) {
      assert.deepEqual(range(utc(2011, 0, 1), utc(2011, 4, 1)), [
        utc(2011, 0, 1),
        utc(2011, 1, 1),
        utc(2011, 2, 1),
        utc(2011, 3, 1)
      ]);
    },
    "does not observe the end of daylight savings time": function(range) {
      assert.deepEqual(range(utc(2011, 9, 1), utc(2012, 1, 1)), [
        utc(2011, 9, 1),
        utc(2011, 10, 1),
        utc(2011, 11, 1),
        utc(2012, 0, 1)
      ]);
    }
  }
}

});

suite.export(module);