toolkit/javascript/d3/test/time/hour-test.js
author Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
Fri, 18 Apr 2014 14:31:58 +0200
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require("../env");
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require("../../d3");
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require("../../d3.time");
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var vows = require("vows"),
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    assert = require("assert");
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var suite = vows.describe("d3.time.hour");
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suite.addBatch({
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  "hour": {
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    topic: function() {
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      return d3.time.hour;
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    },
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    "returns hours": function(floor) {
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      assert.deepEqual(floor(local(2010, 11, 31, 23, 59)), local(2010, 11, 31, 23));
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      assert.deepEqual(floor(local(2011, 0, 1, 0, 0)), local(2011, 0, 1, 0));
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      assert.deepEqual(floor(local(2011, 0, 1, 0, 1)), local(2011, 0, 1, 0));
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    },
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    "observes start of daylight savings time": function(floor) {
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      assert.deepEqual(floor(utc(2011, 2, 13, 8, 59)), utc(2011, 2, 13, 8));
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      assert.deepEqual(floor(utc(2011, 2, 13, 9, 0)), utc(2011, 2, 13, 9));
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      assert.deepEqual(floor(utc(2011, 2, 13, 9, 1)), utc(2011, 2, 13, 9));
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      assert.deepEqual(floor(utc(2011, 2, 13, 9, 59)), utc(2011, 2, 13, 9));
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      assert.deepEqual(floor(utc(2011, 2, 13, 10, 0)), utc(2011, 2, 13, 10));
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      assert.deepEqual(floor(utc(2011, 2, 13, 10, 1)), utc(2011, 2, 13, 10));
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    },
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    "observes end of daylight savings time": function(floor) {
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      assert.deepEqual(floor(utc(2011, 10, 6, 7, 59)), utc(2011, 10, 6, 7));
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      assert.deepEqual(floor(utc(2011, 10, 6, 8, 0)), utc(2011, 10, 6, 8));
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      assert.deepEqual(floor(utc(2011, 10, 6, 8, 1)), utc(2011, 10, 6, 8));
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      assert.deepEqual(floor(utc(2011, 10, 6, 8, 59)), utc(2011, 10, 6, 8));
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      assert.deepEqual(floor(utc(2011, 10, 6, 9, 0)), utc(2011, 10, 6, 9));
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      assert.deepEqual(floor(utc(2011, 10, 6, 9, 1)), utc(2011, 10, 6, 9));
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    },
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    "NPT": {
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      "observes 15-minute offset": tz("Asia/Kathmandu", function(floor) {
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        assert.deepEqual(floor(local(2010, 11, 31, 23, 59, 59)), utc(2010, 11, 31, 17, 15));
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        assert.deepEqual(floor(local(2011, 0, 1, 0, 0, 0)), utc(2010, 11, 31, 18, 15));
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        assert.deepEqual(floor(local(2011, 0, 1, 0, 0, 1)), utc(2010, 11, 31, 18, 15));
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      })
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    },
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    "IST": {
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      "observes 30-minute offset": tz("Asia/Calcutta", function(floor) {
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        assert.deepEqual(floor(local(2010, 11, 31, 23, 59, 59)), utc(2010, 11, 31, 17, 30));
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        assert.deepEqual(floor(local(2011, 0, 1, 0, 0, 0)), utc(2010, 11, 31, 18, 30));
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        assert.deepEqual(floor(local(2011, 0, 1, 0, 0, 1)), utc(2010, 11, 31, 18, 30));
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      })
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    },
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    "UTC": {
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      topic: function(floor) {
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        return floor.utc;
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      },
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      "returns hours": function(floor) {
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        assert.deepEqual(floor(utc(2010, 11, 31, 23, 59)), utc(2010, 11, 31, 23));
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        assert.deepEqual(floor(utc(2011, 0, 1, 0, 0)), utc(2011, 0, 1, 0));
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        assert.deepEqual(floor(utc(2011, 0, 1, 0, 1)), utc(2011, 0, 1, 0));
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      },
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      "does not observe the start of daylight savings time": function(floor) {
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        assert.deepEqual(floor(utc(2011, 2, 13, 8, 59)), utc(2011, 2, 13, 8));
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        assert.deepEqual(floor(utc(2011, 2, 13, 9, 0)), utc(2011, 2, 13, 9));
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        assert.deepEqual(floor(utc(2011, 2, 13, 9, 1)), utc(2011, 2, 13, 9));
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        assert.deepEqual(floor(utc(2011, 2, 13, 9, 59)), utc(2011, 2, 13, 9));
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        assert.deepEqual(floor(utc(2011, 2, 13, 10, 0)), utc(2011, 2, 13, 10));
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        assert.deepEqual(floor(utc(2011, 2, 13, 10, 1)), utc(2011, 2, 13, 10));
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      },
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      "does not observe the end of daylight savings time": function(floor) {
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        assert.deepEqual(floor(utc(2011, 10, 6, 7, 59)), utc(2011, 10, 6, 7));
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        assert.deepEqual(floor(utc(2011, 10, 6, 8, 0)), utc(2011, 10, 6, 8));
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        assert.deepEqual(floor(utc(2011, 10, 6, 8, 1)), utc(2011, 10, 6, 8));
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        assert.deepEqual(floor(utc(2011, 10, 6, 8, 59)), utc(2011, 10, 6, 8));
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        assert.deepEqual(floor(utc(2011, 10, 6, 9, 0)), utc(2011, 10, 6, 9));
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        assert.deepEqual(floor(utc(2011, 10, 6, 9, 1)), utc(2011, 10, 6, 9));
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      }
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    }
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  }
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});
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function local(year, month, day, hours, minutes, seconds) {
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  return new Date(year, month, day, hours || 0, minutes || 0, seconds || 0);
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}
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function utc(year, month, day, hours, minutes, seconds) {
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  return new Date(Date.UTC(year, month, day, hours || 0, minutes || 0, seconds || 0));
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}
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function tz(tz, scope) {
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  return function() {
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    var o = process.env.TZ;
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    try {
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      process.env.TZ = tz;
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      new Date(0).toString(); // invalidate node's dst cache
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      new Date().toString();
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      scope.apply(this, arguments);
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    } finally {
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      process.env.TZ = o;
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      new Date(0).toString(); // invalidate node's dst cache
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      new Date().toString();
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    }
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  };
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}
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suite.export(module);