aboutsummaryrefslogtreecommitdiffstats
path: root/activesupport/test/time_zone_test.rb
blob: 6dec6a8f3403980ee48036daa4e350b42ed992af (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
require 'abstract_unit'

class TimeZoneTest < Test::Unit::TestCase
  def test_utc_to_local
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    assert_equal Time.utc(1999, 12, 31, 19), zone.utc_to_local(Time.utc(2000, 1)) # standard offset -0500
    assert_equal Time.utc(2000, 6, 30, 20), zone.utc_to_local(Time.utc(2000, 7)) # dst offset -0400
  end

  def test_local_to_utc
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    assert_equal Time.utc(2000, 1, 1, 5), zone.local_to_utc(Time.utc(2000, 1)) # standard offset -0500
    assert_equal Time.utc(2000, 7, 1, 4), zone.local_to_utc(Time.utc(2000, 7)) # dst offset -0400
  end

  def test_period_for_local
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    assert_instance_of TZInfo::TimezonePeriod, zone.period_for_local(Time.utc(2000))
  end

  ActiveSupport::TimeZone::MAPPING.keys.each do |name|
    define_method("test_map_#{name.downcase.gsub(/[^a-z]/, '_')}_to_tzinfo") do
      zone = ActiveSupport::TimeZone[name]
      assert zone.tzinfo.respond_to?(:period_for_local)
    end
  end

  def test_from_integer_to_map
    assert_instance_of ActiveSupport::TimeZone, ActiveSupport::TimeZone[-28800] # PST
  end

  def test_from_duration_to_map
    assert_instance_of ActiveSupport::TimeZone, ActiveSupport::TimeZone[-480.minutes] # PST
  end

  ActiveSupport::TimeZone.all.each do |zone|
    name = zone.name.downcase.gsub(/[^a-z]/, '_')
    define_method("test_from_#{name}_to_map") do
      assert_instance_of ActiveSupport::TimeZone, ActiveSupport::TimeZone[zone.name]
    end

    define_method("test_utc_offset_for_#{name}") do
      period = zone.tzinfo.current_period
      assert_equal period.utc_offset, zone.utc_offset
    end
  end

  def test_now
    with_env_tz 'US/Eastern' do
      Time.stubs(:now).returns(Time.local(2000))
      zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
      assert_instance_of ActiveSupport::TimeWithZone, zone.now
      assert_equal Time.utc(2000,1,1,5), zone.now.utc
      assert_equal Time.utc(2000), zone.now.time
      assert_equal zone, zone.now.time_zone
    end
  end

  def test_now_enforces_spring_dst_rules
    with_env_tz 'US/Eastern' do
      Time.stubs(:now).returns(Time.local(2006,4,2,2)) # 2AM springs forward to 3AM
      zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
      assert_equal Time.utc(2006,4,2,3), zone.now.time
      assert_equal true, zone.now.dst?
    end
  end

  def test_now_enforces_fall_dst_rules
    with_env_tz 'US/Eastern' do
      Time.stubs(:now).returns(Time.at(1162098000)) # equivalent to 1AM DST
      zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
      assert_equal Time.utc(2006,10,29,1), zone.now.time
      assert_equal true, zone.now.dst?
    end
  end

  def test_today
    Time.stubs(:now).returns(Time.utc(2000, 1, 1, 4, 59, 59)) # 1 sec before midnight Jan 1 EST
    assert_equal Date.new(1999, 12, 31), ActiveSupport::TimeZone['Eastern Time (US & Canada)'].today
    Time.stubs(:now).returns(Time.utc(2000, 1, 1, 5)) # midnight Jan 1 EST
    assert_equal Date.new(2000, 1, 1), ActiveSupport::TimeZone['Eastern Time (US & Canada)'].today
    Time.stubs(:now).returns(Time.utc(2000, 1, 2, 4, 59, 59)) # 1 sec before midnight Jan 2 EST
    assert_equal Date.new(2000, 1, 1), ActiveSupport::TimeZone['Eastern Time (US & Canada)'].today
    Time.stubs(:now).returns(Time.utc(2000, 1, 2, 5)) # midnight Jan 2 EST
    assert_equal Date.new(2000, 1, 2), ActiveSupport::TimeZone['Eastern Time (US & Canada)'].today
  end

  def test_local
    time = ActiveSupport::TimeZone["Hawaii"].local(2007, 2, 5, 15, 30, 45)
    assert_equal Time.utc(2007, 2, 5, 15, 30, 45), time.time
    assert_equal ActiveSupport::TimeZone["Hawaii"], time.time_zone
  end

  def test_local_with_old_date
    time = ActiveSupport::TimeZone["Hawaii"].local(1850, 2, 5, 15, 30, 45)
    assert_equal [45,30,15,5,2,1850], time.to_a[0,6]
    assert_equal ActiveSupport::TimeZone["Hawaii"], time.time_zone
  end

  def test_local_enforces_spring_dst_rules
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    twz = zone.local(2006,4,2,1,59,59) # 1 second before DST start
    assert_equal Time.utc(2006,4,2,1,59,59), twz.time
    assert_equal Time.utc(2006,4,2,6,59,59), twz.utc
    assert_equal false, twz.dst?
    assert_equal 'EST', twz.zone
    twz2 = zone.local(2006,4,2,2) # 2AM does not exist because at 2AM, time springs forward to 3AM
    assert_equal Time.utc(2006,4,2,3), twz2.time # twz is created for 3AM
    assert_equal Time.utc(2006,4,2,7), twz2.utc
    assert_equal true, twz2.dst?
    assert_equal 'EDT', twz2.zone
    twz3 = zone.local(2006,4,2,2,30) # 2:30AM does not exist because at 2AM, time springs forward to 3AM
    assert_equal Time.utc(2006,4,2,3,30), twz3.time # twz is created for 3:30AM
    assert_equal Time.utc(2006,4,2,7,30), twz3.utc
    assert_equal true, twz3.dst?
    assert_equal 'EDT', twz3.zone
  end

  def test_local_enforces_fall_dst_rules
    # 1AM during fall DST transition is ambiguous, it could be either DST or non-DST 1AM
    # Mirroring Time.local behavior, this method selects the DST time
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    twz = zone.local(2006,10,29,1)
    assert_equal Time.utc(2006,10,29,1), twz.time
    assert_equal Time.utc(2006,10,29,5), twz.utc
    assert_equal true, twz.dst?
    assert_equal 'EDT', twz.zone
  end

  def test_at
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    secs = 946684800.0
    twz = zone.at(secs)
    assert_equal Time.utc(1999,12,31,19), twz.time
    assert_equal Time.utc(2000), twz.utc
    assert_equal zone, twz.time_zone
    assert_equal secs, twz.to_f
  end

  def test_at_with_old_date
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    secs = DateTime.civil(1850).to_f
    twz = zone.at(secs)
    assert_equal [1850, 1, 1, 0], [twz.utc.year, twz.utc.mon, twz.utc.day, twz.utc.hour]
    assert_equal zone, twz.time_zone
    assert_equal secs, twz.to_f
  end

  def test_parse
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    twz = zone.parse('1999-12-31 19:00:00')
    assert_equal Time.utc(1999,12,31,19), twz.time
    assert_equal Time.utc(2000), twz.utc
    assert_equal zone, twz.time_zone
  end

  def test_parse_string_with_timezone
    (-11..13).each do |timezone_offset|
      zone = ActiveSupport::TimeZone[timezone_offset]
      twz = zone.parse('1999-12-31 19:00:00')
      assert_equal twz, zone.parse(twz.to_s)
    end
  end

  def test_parse_with_old_date
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    twz = zone.parse('1850-12-31 19:00:00')
    assert_equal [0,0,19,31,12,1850], twz.to_a[0,6]
    assert_equal zone, twz.time_zone
  end

  def test_parse_far_future_date_with_time_zone_offset_in_string
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    twz = zone.parse('2050-12-31 19:00:00 -10:00') # i.e., 2050-01-01 05:00:00 UTC
    assert_equal [0,0,0,1,1,2051], twz.to_a[0,6]
    assert_equal zone, twz.time_zone
  end

  def test_parse_returns_nil_when_string_without_date_information_is_passed_in
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    assert_nil zone.parse('foobar')
    assert_nil zone.parse('   ')
  end

  def test_parse_with_incomplete_date
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    zone.stubs(:now).returns zone.local(1999,12,31)
    twz = zone.parse('19:00:00')
    assert_equal Time.utc(1999,12,31,19), twz.time
  end

  def test_utc_offset_lazy_loaded_from_tzinfo_when_not_passed_in_to_initialize
    tzinfo = TZInfo::Timezone.get('America/New_York')
    zone = ActiveSupport::TimeZone.create(tzinfo.name, nil, tzinfo)
    assert_equal nil, zone.instance_variable_get('@utc_offset')
    assert_equal(-18_000, zone.utc_offset)
  end

  def test_formatted_offset_positive
    zone = ActiveSupport::TimeZone['Moscow']
    assert_equal "+03:00", zone.formatted_offset
    assert_equal "+0300", zone.formatted_offset(false)
  end

  def test_formatted_offset_negative
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    assert_equal "-05:00", zone.formatted_offset
    assert_equal "-0500", zone.formatted_offset(false)
  end

  def test_formatted_offset_zero
    zone = ActiveSupport::TimeZone['London']
    assert_equal "+00:00", zone.formatted_offset
    assert_equal "UTC", zone.formatted_offset(true, 'UTC')
  end

  def test_zone_compare
    zone1 = ActiveSupport::TimeZone['Central Time (US & Canada)'] # offset -0600
    zone2 = ActiveSupport::TimeZone['Eastern Time (US & Canada)'] # offset -0500
    assert zone1 < zone2
    assert zone2 > zone1
    assert zone1 == zone1
  end

  def test_zone_match
    zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)']
    assert zone =~ /Eastern/
    assert zone =~ /New_York/
    assert zone !~ /Nonexistent_Place/
  end

  def test_to_s
    assert_equal "(GMT+03:00) Moscow", ActiveSupport::TimeZone['Moscow'].to_s
  end

  def test_all_sorted
    all = ActiveSupport::TimeZone.all
    1.upto( all.length-1 ) do |i|
      assert all[i-1] < all[i]
    end
  end

  def test_index
    assert_nil ActiveSupport::TimeZone["bogus"]
    assert_instance_of ActiveSupport::TimeZone, ActiveSupport::TimeZone["Central Time (US & Canada)"]
    assert_instance_of ActiveSupport::TimeZone, ActiveSupport::TimeZone[8]
    assert_raises(ArgumentError) { ActiveSupport::TimeZone[false] }
  end

  def test_new
    assert_equal ActiveSupport::TimeZone["Central Time (US & Canada)"], ActiveSupport::TimeZone.new("Central Time (US & Canada)")
  end

  def test_us_zones
    assert ActiveSupport::TimeZone.us_zones.include?(ActiveSupport::TimeZone["Hawaii"])
    assert !ActiveSupport::TimeZone.us_zones.include?(ActiveSupport::TimeZone["Kuala Lumpur"])
  end

  protected
    def with_env_tz(new_tz = 'US/Eastern')
      old_tz, ENV['TZ'] = ENV['TZ'], new_tz
      yield
    ensure
      old_tz ? ENV['TZ'] = old_tz : ENV.delete('TZ')
    end
end