3 files changed, 126 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/date_and_time_compatibility_test.rb b/activesupport/test/core_ext/date_and_time_compatibility_test.rb
new file mode 100644
index 0000000000..7cc2fae5be
--- /dev/null
+++ b/activesupport/test/core_ext/date_and_time_compatibility_test.rb
@@ -0,0 +1,110 @@
+require 'abstract_unit'
+require 'active_support/time'
+require 'time_zone_test_helpers'
+
+class DateAndTimeCompatibilityTest < ActiveSupport::TestCase
+  include TimeZoneTestHelpers
+
+  def setup
+    @utc_time = Time.utc(2016, 4, 23, 14, 11, 12)
+    @utc_offset = 3600
+    @system_offset = -14400
+    @zone = ActiveSupport::TimeZone['London']
+  end
+
+  def test_time_to_time_preserves_timezone
+    with_preserve_timezone(true) do
+      with_env_tz 'US/Eastern' do
+        time = Time.new(2016, 4, 23, 15, 11, 12, 3600).to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @utc_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_time_to_time_does_not_preserve_time_zone
+    with_preserve_timezone(false) do
+      with_env_tz 'US/Eastern' do
+        time = Time.new(2016, 4, 23, 15, 11, 12, 3600).to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @system_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_datetime_to_time_preserves_timezone
+    with_preserve_timezone(true) do
+      with_env_tz 'US/Eastern' do
+        time = DateTime.new(2016, 4, 23, 15, 11, 12, Rational(1,24)).to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @utc_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_datetime_to_time_does_not_preserve_time_zone
+    with_preserve_timezone(false) do
+      with_env_tz 'US/Eastern' do
+        time = DateTime.new(2016, 4, 23, 15, 11, 12, Rational(1,24)).to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @system_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_twz_to_time_preserves_timezone
+    with_preserve_timezone(true) do
+      with_env_tz 'US/Eastern' do
+        time = ActiveSupport::TimeWithZone.new(@utc_time, @zone).to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @utc_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_twz_to_time_does_not_preserve_time_zone
+    with_preserve_timezone(false) do
+      with_env_tz 'US/Eastern' do
+        time = ActiveSupport::TimeWithZone.new(@utc_time, @zone).to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @system_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_string_to_time_preserves_timezone
+    with_preserve_timezone(true) do
+      with_env_tz 'US/Eastern' do
+        time = "2016-04-23T15:11:12+01:00".to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @utc_offset, time.utc_offset
+      end
+    end
+  end
+
+  def test_string_to_time_does_not_preserve_time_zone
+    with_preserve_timezone(false) do
+      with_env_tz 'US/Eastern' do
+        time = "2016-04-23T15:11:12+01:00".to_time
+
+        assert_instance_of Time, time
+        assert_equal @utc_time, time.getutc
+        assert_equal @system_offset, time.utc_offset
+      end
+    end
+  end
+end
diff --git a/activesupport/test/core_ext/date_time_ext_test.rb b/activesupport/test/core_ext/date_time_ext_test.rb
index 16efeeadd5..d57e71df3b 100644
--- a/activesupport/test/core_ext/date_time_ext_test.rb
+++ b/activesupport/test/core_ext/date_time_ext_test.rb
@@ -40,6 +40,14 @@ class DateTimeExtCalculationsTest < ActiveSupport::TestCase
     Time::DATE_FORMATS.delete(:custom)
   end
 
+  def test_getlocal
+    with_env_tz 'US/Eastern' do
+      assert_equal Time.local(2016, 3, 11, 10, 11, 12), DateTime.new(2016, 3, 11, 15, 11, 12, 0).getlocal
+      assert_equal Time.local(2016, 3, 21, 11, 11, 12), DateTime.new(2016, 3, 21, 15, 11, 12, 0).getlocal
+      assert_equal Time.local(2016, 4, 1, 11, 11, 12), DateTime.new(2016, 4, 1, 16, 11, 12, Rational(1,24)).getlocal
+    end
+  end
+
   def test_to_date
     assert_equal Date.new(2005, 2, 21), DateTime.new(2005, 2, 21, 14, 30, 0).to_date
   end
diff --git a/activesupport/test/time_zone_test_helpers.rb b/activesupport/test/time_zone_test_helpers.rb
index 9632b89d09..eb6f7d0f85 100644
--- a/activesupport/test/time_zone_test_helpers.rb
+++ b/activesupport/test/time_zone_test_helpers.rb
@@ -13,4 +13,12 @@ module TimeZoneTestHelpers
   ensure
     old_tz ? ENV['TZ'] = old_tz : ENV.delete('TZ')
   end
+
+  def with_preserve_timezone(value)
+    old_preserve_tz = ActiveSupport.to_time_preserves_timezone
+    ActiveSupport.to_time_preserves_timezone = value
+    yield
+  ensure
+    ActiveSupport.to_time_preserves_timezone = old_preserve_tz
+  end
 end