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.hours”);

suite.addBatch({

"hours": {
  topic: load("time/hour").expression("d3.time.hours"),
  "returns hours": function(range) {
    assert.deepEqual(range(local(2010, 11, 31, 12, 30), local(2010, 11, 31, 15, 30)), [
      local(2010, 11, 31, 13),
      local(2010, 11, 31, 14),
      local(2010, 11, 31, 15)
    ]);
  },
  "has an inclusive lower bound": function(range) {
    assert.deepEqual(range(local(2010, 11, 31, 23), local(2011, 0, 1, 2))[0], local(2010, 11, 31, 23));
  },
  "has an exclusive upper bound": function(range) {
    assert.deepEqual(range(local(2010, 11, 31, 23), local(2011, 0, 1, 2))[2], local(2011, 0, 1, 1));
  },
  "can skip hours": function(range) {
    assert.deepEqual(range(local(2011, 1, 1, 1), local(2011, 1, 1, 13), 3), [
      local(2011, 1, 1, 3),
      local(2011, 1, 1, 6),
      local(2011, 1, 1, 9),
      local(2011, 1, 1, 12)
    ]);
  },
  "observes start of daylight savings time": function(range) {
    assert.deepEqual(range(local(2011, 2, 13, 1), local(2011, 2, 13, 5)), [
      utc(2011, 2, 13, 9),
      utc(2011, 2, 13, 10),
      utc(2011, 2, 13, 11)
    ]);
  },
  "observes end of daylight savings time": function(range) {
    assert.deepEqual(range(local(2011, 10, 6, 0), local(2011, 10, 6, 2)), [
      utc(2011, 10, 6, 7),
      utc(2011, 10, 6, 8),
      utc(2011, 10, 6, 9)
    ]);
  },
  "NPT": {
    "observes 15-minute offset": time.zone(345, function(range) {
      assert.deepEqual(range(local(2011, 10, 7, 0), local(2011, 10, 7, 3)), [
        utc(2011, 10, 6, 18, 15),
        utc(2011, 10, 6, 19, 15),
        utc(2011, 10, 6, 20, 15)
      ]);
    })
  },
  "IST": {
    "observes 30-minute offset": time.zone(330, function(range) {
      assert.deepEqual(range(local(2011, 10, 7, 0), local(2011, 10, 7, 3)), [
        utc(2011, 10, 6, 18, 30),
        utc(2011, 10, 6, 19, 30),
        utc(2011, 10, 6, 20, 30)
      ]);
    })
  },
  "UTC": {
    topic: function(range) {
      return range.utc;
    },
    "returns hours": function(range) {
      assert.deepEqual(range(utc(2010, 11, 31, 12, 30), utc(2010, 11, 31, 15, 30)), [
        utc(2010, 11, 31, 13),
        utc(2010, 11, 31, 14),
        utc(2010, 11, 31, 15)
      ]);
    },
    "has an inclusive lower bound": function(range) {
      assert.deepEqual(range(utc(2010, 11, 31, 23), utc(2011, 0, 1, 2))[0], utc(2010, 11, 31, 23));
    },
    "has an exclusive upper bound": function(range) {
      assert.deepEqual(range(utc(2010, 11, 31, 23), utc(2011, 0, 1, 2))[2], utc(2011, 0, 1, 1));
    },
    "can skip hours": function(range) {
      assert.deepEqual(range(utc(2011, 1, 1, 1), utc(2011, 1, 1, 13), 3), [
        utc(2011, 1, 1, 3),
        utc(2011, 1, 1, 6),
        utc(2011, 1, 1, 9),
        utc(2011, 1, 1, 12)
      ]);
    },
    "observes start of daylight savings time": function(range) {
      assert.deepEqual(range(utc(2011, 2, 13, 9), utc(2011, 2, 13, 12)), [
        utc(2011, 2, 13, 9),
        utc(2011, 2, 13, 10),
        utc(2011, 2, 13, 11)
      ]);
    },
    "observes end of daylight savings time": function(range) {
      assert.deepEqual(range(utc(2011, 10, 6, 7), utc(2011, 10, 6, 10)), [
        utc(2011, 10, 6, 7),
        utc(2011, 10, 6, 8),
        utc(2011, 10, 6, 9)
      ]);
    }
  }
}

});

suite.export(module);