deprecate `assert_blank` and `assert_present`.

They don't add any benefits over `assert object.blank?`
and `assert object.present?`

16 files changed, 60 insertions, 43 deletions

diff --git a/actionpack/test/controller/action_pack_assertions_test.rb b/actionpack/test/controller/action_pack_assertions_test.rb
index b94f45bfe7..5d727b3811 100644
--- a/actionpack/test/controller/action_pack_assertions_test.rb
+++ b/actionpack/test/controller/action_pack_assertions_test.rb
@@ -259,7 +259,7 @@ class ActionPackAssertionsControllerTest < ActionController::TestCase
   def test_flash_exist
     process :flash_me
     assert flash.any?
-    assert_present flash['hello']
+    assert flash['hello'].present?
   end
 
   def test_flash_does_not_exist
diff --git a/actionpack/test/controller/output_escaping_test.rb b/actionpack/test/controller/output_escaping_test.rb
index f6913a2138..43a8c05cda 100644
--- a/actionpack/test/controller/output_escaping_test.rb
+++ b/actionpack/test/controller/output_escaping_test.rb
@@ -3,7 +3,7 @@ require 'abstract_unit'
 class OutputEscapingTest < ActiveSupport::TestCase
 
   test "escape_html shouldn't die when passed nil" do
-    assert_blank ERB::Util.h(nil)
+    assert ERB::Util.h(nil).blank?
   end
 
   test "escapeHTML should escape strings" do
diff --git a/actionpack/test/controller/render_test.rb b/actionpack/test/controller/render_test.rb
index c7a66f4298..84a173980c 100644
--- a/actionpack/test/controller/render_test.rb
+++ b/actionpack/test/controller/render_test.rb
@@ -1221,27 +1221,27 @@ class RenderTest < ActionController::TestCase
 
   def test_head_created
     post :head_created
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_response :created
   end
 
   def test_head_created_with_application_json_content_type
     post :head_created_with_application_json_content_type
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal "application/json", @response.header["Content-Type"]
     assert_response :created
   end
 
   def test_head_ok_with_image_png_content_type
     post :head_ok_with_image_png_content_type
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal "image/png", @response.header["Content-Type"]
     assert_response :ok
   end
 
   def test_head_with_location_header
     get :head_with_location_header
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal "/foo", @response.headers["Location"]
     assert_response :ok
   end
@@ -1254,7 +1254,7 @@ class RenderTest < ActionController::TestCase
       end
 
       get :head_with_location_object
-      assert_blank @response.body
+      assert @response.body.blank?
       assert_equal "http://www.nextangle.com/customers/1", @response.headers["Location"]
       assert_response :ok
     end
@@ -1262,14 +1262,14 @@ class RenderTest < ActionController::TestCase
 
   def test_head_with_custom_header
     get :head_with_custom_header
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal "something", @response.headers["X-Custom-Header"]
     assert_response :ok
   end
 
   def test_head_with_www_authenticate_header
     get :head_with_www_authenticate_header
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal "something", @response.headers["WWW-Authenticate"]
     assert_response :ok
   end
@@ -1603,7 +1603,7 @@ class LastModifiedRenderTest < ActionController::TestCase
     @request.if_modified_since = @last_modified
     get :conditional_hello
     assert_equal 304, @response.status.to_i
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal @last_modified, @response.headers['Last-Modified']
   end
 
@@ -1618,7 +1618,7 @@ class LastModifiedRenderTest < ActionController::TestCase
     @request.if_modified_since = 'Thu, 16 Jul 2008 00:00:00 GMT'
     get :conditional_hello
     assert_equal 200, @response.status.to_i
-    assert_present @response.body
+    assert @response.body.present?
     assert_equal @last_modified, @response.headers['Last-Modified']
   end
 
@@ -1632,7 +1632,7 @@ class LastModifiedRenderTest < ActionController::TestCase
     @request.if_modified_since = @last_modified
     get :conditional_hello_with_record
     assert_equal 304, @response.status.to_i
-    assert_blank @response.body
+    assert @response.body.blank?
     assert_equal @last_modified, @response.headers['Last-Modified']
   end
 
@@ -1647,7 +1647,7 @@ class LastModifiedRenderTest < ActionController::TestCase
     @request.if_modified_since = 'Thu, 16 Jul 2008 00:00:00 GMT'
     get :conditional_hello_with_record
     assert_equal 200, @response.status.to_i
-    assert_present @response.body
+    assert @response.body.present?
     assert_equal @last_modified, @response.headers['Last-Modified']
   end
 
diff --git a/actionpack/test/controller/request_forgery_protection_test.rb b/actionpack/test/controller/request_forgery_protection_test.rb
index 1f637eb791..523a8d0572 100644
--- a/actionpack/test/controller/request_forgery_protection_test.rb
+++ b/actionpack/test/controller/request_forgery_protection_test.rb
@@ -320,7 +320,7 @@ class FreeCookieControllerTest < ActionController::TestCase
 
   test 'should not emit a csrf-token meta tag' do
     get :meta
-    assert_blank @response.body
+    assert @response.body.blank?
   end
 end
 
diff --git a/actionpack/test/controller/test_case_test.rb b/actionpack/test/controller/test_case_test.rb
index bdca1d4d77..e4d78d58b9 100644
--- a/actionpack/test/controller/test_case_test.rb
+++ b/actionpack/test/controller/test_case_test.rb
@@ -692,7 +692,7 @@ XML
     assert_equal "bar", @request.params[:foo]
     @request.recycle!
     post :no_op
-    assert_blank @request.params[:foo]
+    assert @request.params[:foo].blank?
   end
 
   def test_symbolized_path_params_reset_after_request
diff --git a/actionpack/test/template/atom_feed_helper_test.rb b/actionpack/test/template/atom_feed_helper_test.rb
index 89aae4ac56..63b5ac0fab 100644
--- a/actionpack/test/template/atom_feed_helper_test.rb
+++ b/actionpack/test/template/atom_feed_helper_test.rb
@@ -238,7 +238,7 @@ class AtomFeedTest < ActionController::TestCase
       get :index, :id=>"provide_builder"
       # because we pass in the non-default builder, the content generated by the
       # helper should go 'nowhere'.  Leaving the response body blank.
-      assert_blank @response.body
+      assert @response.body.blank?
     end
   end
 
diff --git a/activerecord/test/cases/associations/join_model_test.rb b/activerecord/test/cases/associations/join_model_test.rb
index 9b00c21b52..10ec33be75 100644
--- a/activerecord/test/cases/associations/join_model_test.rb
+++ b/activerecord/test/cases/associations/join_model_test.rb
@@ -443,8 +443,8 @@ class AssociationsJoinModelTest < ActiveRecord::TestCase
 
   def test_has_many_through_uses_conditions_specified_on_the_has_many_association
     author = Author.first
-    assert_present author.comments
-    assert_blank author.nonexistant_comments
+    assert author.comments.present?
+    assert author.nonexistant_comments.blank?
   end
 
   def test_has_many_through_uses_correct_attributes
diff --git a/activerecord/test/cases/deprecated_dynamic_methods_test.rb b/activerecord/test/cases/deprecated_dynamic_methods_test.rb
index dde36e7f72..32eb87d522 100644
--- a/activerecord/test/cases/deprecated_dynamic_methods_test.rb
+++ b/activerecord/test/cases/deprecated_dynamic_methods_test.rb
@@ -568,9 +568,9 @@ class DynamicScopeTest < ActiveRecord::TestCase
   end
 
   def test_dynamic_scope_should_create_methods_after_hitting_method_missing
-    assert_blank @test_klass.methods.grep(/scoped_by_type/)
+    assert @test_klass.methods.grep(/scoped_by_type/).blank?
     @test_klass.scoped_by_type(nil)
-    assert_present @test_klass.methods.grep(/scoped_by_type/)
+    assert @test_klass.methods.grep(/scoped_by_type/).present?
   end
 
   def test_dynamic_scope_with_less_number_of_arguments
diff --git a/activerecord/test/cases/relation_scoping_test.rb b/activerecord/test/cases/relation_scoping_test.rb
index d318dab1e1..78fb91d321 100644
--- a/activerecord/test/cases/relation_scoping_test.rb
+++ b/activerecord/test/cases/relation_scoping_test.rb
@@ -227,7 +227,7 @@ class NestedRelationScopingTest < ActiveRecord::TestCase
   def test_nested_exclusive_scope_for_create
     comment = Comment.create_with(:body => "Hey guys, nested scopes are broken. Please fix!").scoping do
       Comment.unscoped.create_with(:post_id => 1).scoping do
-        assert_blank Comment.new.body
+        assert Comment.new.body.blank?
         Comment.create :body => "Hey guys"
       end
     end
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 0cd838c0b0..3a499a2025 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -509,7 +509,7 @@ class RelationTest < ActiveRecord::TestCase
 
   def test_find_in_empty_array
     authors = Author.all.where(:id => [])
-    assert_blank authors.to_a
+    assert authors.to_a.blank?
   end
 
   def test_where_with_ar_object
@@ -723,7 +723,7 @@ class RelationTest < ActiveRecord::TestCase
 
   def test_relation_merging_with_locks
     devs = Developer.lock.where("salary >= 80000").order("id DESC").merge(Developer.limit(2))
-    assert_present devs.locked
+    assert devs.locked.present?
   end
 
   def test_relation_merging_with_preload
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index cc23ceb02c..08bec2f4ae 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Deprecate `assert_present` and `assert_blank` in favor of
+    `assert object.blank?` and `assert object.present?`
+
+    *Yves Senn*
+
 *   Change `String#to_date` to use `Date.parse`. This gives more consistent error
     messages and allows the use of partial dates.
 
diff --git a/activesupport/lib/active_support/testing/assertions.rb b/activesupport/lib/active_support/testing/assertions.rb
index 88aebba5c5..175f7ffe5a 100644
--- a/activesupport/lib/active_support/testing/assertions.rb
+++ b/activesupport/lib/active_support/testing/assertions.rb
@@ -103,6 +103,7 @@ module ActiveSupport
       #
       #   assert_blank [], 'this should be blank'
       def assert_blank(object, message=nil)
+        ActiveSupport::Deprecation.warn('"assert_blank" is deprecated. Please use "assert object.blank?" instead')
         message ||= "#{object.inspect} is not blank"
         assert object.blank?, message
       end
@@ -117,6 +118,7 @@ module ActiveSupport
       #
       #   assert_present({ data: 'x' }, 'this should not be blank')
       def assert_present(object, message=nil)
+        ActiveSupport::Deprecation.warn('"assert_present" is deprecated. Please use "assert object.present?" instead')
         message ||= "#{object.inspect} is blank"
         assert object.present?, message
       end
diff --git a/activesupport/test/caching_test.rb b/activesupport/test/caching_test.rb
index a2e2c51283..5158bbc196 100644
--- a/activesupport/test/caching_test.rb
+++ b/activesupport/test/caching_test.rb
@@ -675,7 +675,7 @@ class FileStoreTest < ActiveSupport::TestCase
   def test_log_exception_when_cache_read_fails
     File.expects(:exist?).raises(StandardError, "failed")
     @cache.send(:read_entry, "winston", {})
-    assert_present @buffer.string
+    assert @buffer.string.present?
   end
 end
 
@@ -897,12 +897,12 @@ class CacheStoreLoggerTest < ActiveSupport::TestCase
 
   def test_logging
     @cache.fetch('foo') { 'bar' }
-    assert_present @buffer.string
+    assert @buffer.string.present?
   end
 
   def test_mute_logging
     @cache.mute { @cache.fetch('foo') { 'bar' } }
-    assert_blank @buffer.string
+    assert @buffer.string.blank?
   end
 end
 
diff --git a/activesupport/test/deprecation_test.rb b/activesupport/test/deprecation_test.rb
index 332100f5a1..c1a468ec86 100644
--- a/activesupport/test/deprecation_test.rb
+++ b/activesupport/test/deprecation_test.rb
@@ -119,9 +119,10 @@ class DeprecationTest < ActiveSupport::TestCase
     ActiveSupport::Deprecation.behavior = :silence
     behavior = ActiveSupport::Deprecation.behavior.first
 
-    assert_blank capture(:stderr) {
+    stderr_output = capture(:stderr) {
       assert_nil behavior.call('Some error!', ['call stack!'])
     }
+    assert stderr_output.blank?
   end
 
   def test_deprecated_instance_variable_proxy
@@ -254,10 +255,10 @@ class DeprecationTest < ActiveSupport::TestCase
       klass::OLD.to_s
     end
   end
-  
+
   def test_deprecated_instance_variable_with_instance_deprecator
     deprecator = deprecator_with_messages
-    
+
     klass = Class.new() do
       def initialize(deprecator)
         @request = ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy.new(self, :request, :@request, deprecator)
diff --git a/activesupport/test/test_test.rb b/activesupport/test/test_test.rb
index 0f93c8b59e..3e6ac811a4 100644
--- a/activesupport/test/test_test.rb
+++ b/activesupport/test/test_test.rb
@@ -92,17 +92,21 @@ class AssertBlankTest < ActiveSupport::TestCase
   NOT_BLANK = [ EmptyFalse.new, Object.new, true, 0, 1, 'x', [nil], { nil => 0 } ]
 
   def test_assert_blank_true
-    BLANK.each { |v| assert_blank v }
+    BLANK.each { |value|
+      assert_deprecated { assert_blank value }
+    }
   end
 
   def test_assert_blank_false
     NOT_BLANK.each { |v|
-      begin
-        assert_blank v
-        fail 'should not get to here'
-      rescue Exception => e
-        assert_match(/is not blank/, e.message)
-      end
+      assert_deprecated {
+        begin
+          assert_blank v
+          fail 'should not get to here'
+        rescue Exception => e
+          assert_match(/is not blank/, e.message)
+        end
+      }
     }
   end
 end
@@ -112,17 +116,21 @@ class AssertPresentTest < ActiveSupport::TestCase
   NOT_BLANK = [ EmptyFalse.new, Object.new, true, 0, 1, 'x', [nil], { nil => 0 } ]
 
   def test_assert_present_true
-    NOT_BLANK.each { |v| assert_present v }
+    NOT_BLANK.each { |v|
+      assert_deprecated { assert_present v }
+    }
   end
 
   def test_assert_present_false
     BLANK.each { |v|
-      begin
-        assert_present v
-        fail 'should not get to here'
-      rescue Exception => e
-        assert_match(/is blank/, e.message)
-      end
+      assert_deprecated {
+        begin
+          assert_present v
+          fail 'should not get to here'
+        rescue Exception => e
+          assert_match(/is blank/, e.message)
+        end
+      }
     }
   end
 end
diff --git a/guides/source/4_0_release_notes.md b/guides/source/4_0_release_notes.md
index 34d2c09812..80af0c1225 100644
--- a/guides/source/4_0_release_notes.md
+++ b/guides/source/4_0_release_notes.md
@@ -142,6 +142,7 @@ Please refer to the [Changelog](https://github.com/rails/rails/blob/master/activ
 
 *   BufferedLogger is deprecated.  Use ActiveSupport::Logger, or the logger from Ruby stdlib.
 
+*   Deprecate `assert_present` and `assert_blank` in favor of `assert object.blank?` and `assert object.present?`
 
 Action Pack
 -----------