Change the default test order from `:sorted` to `:random`

3 files changed, 18 insertions, 30 deletions

diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index be9c8a04b7..aa2090b897 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Change the default test order from `:sorted` to `:random`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `ActiveSupport::JSON::Encoding::CircularReferenceError`.
 
     *Rafael Mendonça França*
diff --git a/activesupport/lib/active_support/test_case.rb b/activesupport/lib/active_support/test_case.rb
index 98b68455ab..aa71db3c56 100644
--- a/activesupport/lib/active_support/test_case.rb
+++ b/activesupport/lib/active_support/test_case.rb
@@ -31,29 +31,15 @@ module ActiveSupport
 
       # Returns the order in which test cases are run.
       #
-      #   ActiveSupport::TestCase.test_order # => :sorted
+      #   ActiveSupport::TestCase.test_order # => :random
       #
       # Possible values are +:random+, +:parallel+, +:alpha+, +:sorted+.
-      # Defaults to +:sorted+.
+      # Defaults to +:random+.
       def test_order
         test_order = ActiveSupport.test_order
 
         if test_order.nil?
-          ActiveSupport::Deprecation.warn "You did not specify a value for the " \
-            "configuration option `active_support.test_order`. In Rails 5, " \
-            "the default value of this option will change from `:sorted` to " \
-            "`:random`.\n" \
-            "To disable this warning and keep the current behavior, you can add " \
-            "the following line to your `config/environments/test.rb`:\n" \
-            "\n" \
-            "  Rails.application.configure do\n" \
-            "    config.active_support.test_order = :sorted\n" \
-            "  end\n" \
-            "\n" \
-            "Alternatively, you can opt into the future behavior by setting this " \
-            "option to `:random`."
-
-          test_order = :sorted
+          test_order = :random
           self.test_order = test_order
         end
 
diff --git a/activesupport/test/test_case_test.rb b/activesupport/test/test_case_test.rb
index 5e852c8050..151b623171 100644
--- a/activesupport/test/test_case_test.rb
+++ b/activesupport/test/test_case_test.rb
@@ -182,30 +182,28 @@ class TestOrderTest < ActiveSupport::TestCase
     ActiveSupport::TestCase.test_order = @original_test_order
   end
 
-  def test_defaults_to_sorted_with_warning
+  def test_defaults_to_random
     ActiveSupport::TestCase.test_order = nil
 
-    assert_equal :sorted, assert_deprecated { ActiveSupport::TestCase.test_order }
+    assert_equal :random, ActiveSupport::TestCase.test_order
 
-    # It should only produce a deprecation warning the first time this is accessed
-    assert_equal :sorted, assert_not_deprecated { ActiveSupport::TestCase.test_order }
-    assert_equal :sorted, assert_not_deprecated { ActiveSupport.test_order }
+    assert_equal :random, ActiveSupport.test_order
   end
 
   def test_test_order_is_global
-    ActiveSupport::TestCase.test_order = :random
-
-    assert_equal :random, ActiveSupport.test_order
-    assert_equal :random, ActiveSupport::TestCase.test_order
-    assert_equal :random, self.class.test_order
-    assert_equal :random, Class.new(ActiveSupport::TestCase).test_order
-
-    ActiveSupport.test_order = :sorted
+    ActiveSupport::TestCase.test_order = :sorted
 
     assert_equal :sorted, ActiveSupport.test_order
     assert_equal :sorted, ActiveSupport::TestCase.test_order
     assert_equal :sorted, self.class.test_order
     assert_equal :sorted, Class.new(ActiveSupport::TestCase).test_order
+
+    ActiveSupport.test_order = :random
+
+    assert_equal :random, ActiveSupport.test_order
+    assert_equal :random, ActiveSupport::TestCase.test_order
+    assert_equal :random, self.class.test_order
+    assert_equal :random, Class.new(ActiveSupport::TestCase).test_order
   end
 
   def test_i_suck_and_my_tests_are_order_dependent!