Add `#on_weekday?` method to `Date`, `Time`, and `DateTime`.

4 files changed, 24 insertions, 1 deletions

diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 3d4cc8fae6..f4c324803c 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,8 +1,16 @@
+*   Add `#on_weekday?` method to `Date`, `Time`, and `DateTime`.
+
+    `#on_weekday?` returns `true` if the receiving date/time does not fall on a Saturday
+    or Sunday.
+    
+    *Vipul A M*
+
 *   Add `Array#second_to_last` and `Array#third_to_last` methods.
 
     *Brian Christian*
 
 *  Fix regression in `Hash#dig` for HashWithIndifferentAccess.
+
    *Jon Moss*
 
 ## Rails 5.0.0.beta2 (February 01, 2016) ##
diff --git a/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb b/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb
index e079af594d..2de0d19a7e 100644
--- a/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb
@@ -51,6 +51,11 @@ module DateAndTime
       WEEKEND_DAYS.include?(wday)
     end
 
+    # Returns true if the date/time does not fall on a Saturday or Sunday.
+    def on_weekday?
+      !WEEKEND_DAYS.include?(wday)
+    end
+
     # Returns a new date/time the specified number of days ago.
     def days_ago(days)
       advance(:days => -days)
diff --git a/activesupport/test/core_ext/date_and_time_behavior.rb b/activesupport/test/core_ext/date_and_time_behavior.rb
index 784547bdf8..54df87def8 100644
--- a/activesupport/test/core_ext/date_and_time_behavior.rb
+++ b/activesupport/test/core_ext/date_and_time_behavior.rb
@@ -301,6 +301,16 @@ module DateAndTimeBehavior
     assert_not date_time_init(2015,1,5,15,15,10).on_weekend?
   end
 
+  def test_on_weekday_on_sunday
+    assert_not date_time_init(2015,1,4,0,0,0).on_weekday?
+    assert_not date_time_init(2015,1,4,15,15,10).on_weekday?
+  end
+
+  def test_on_weekday_on_monday
+    assert date_time_init(2015,1,5,0,0,0).on_weekday?
+    assert date_time_init(2015,1,5,15,15,10).on_weekday?
+  end
+
   def with_bw_default(bw = :monday)
     old_bw = Date.beginning_of_week
     Date.beginning_of_week = bw
diff --git a/guides/source/5_0_release_notes.md b/guides/source/5_0_release_notes.md
index 4e8252f85b..5ae78eba04 100644
--- a/guides/source/5_0_release_notes.md
+++ b/guides/source/5_0_release_notes.md
@@ -705,7 +705,7 @@ Please refer to the [Changelog][active-support] for detailed changes.
 *   Changed the default test order from `:sorted` to `:random`.
     ([commit](https://github.com/rails/rails/commit/5f777e4b5ee2e3e8e6fd0e2a208ec2a4d25a960d))
 
-*   Added `#on_weekend?`, `#next_weekday`, `#prev_weekday` methods to `Date`,
+*   Added `#on_weekend?`, `#on_weekday?`, `#next_weekday`, `#prev_weekday` methods to `Date`,
     `Time`, and `DateTime`.
     ([Pull Request](https://github.com/rails/rails/pull/18335))