1 files changed, 22 insertions, 0 deletions
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 91bc407d42..3edc237c44 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -1234,4 +1234,26 @@ class RelationTest < ActiveRecord::TestCase
     scope = Post.order('foo(comments.body)')
     assert_equal [], scope.references_values
   end
+
+  def test_presence
+    topics = Topic.scoped
+
+    # the first query is triggered because there are no topics yet.
+    assert_queries(1) { assert topics.present? }
+
+    # checking if there are topics is used before you actually display them,
+    # thus it shouldn't invoke an extra count query.
+    assert_no_queries { assert topics.present? }
+    assert_no_queries { assert !topics.blank? }
+
+    # shows count of topics and loops after loading the query should not trigger extra queries either.
+    assert_no_queries { topics.size }
+    assert_no_queries { topics.length }
+    assert_no_queries { topics.each }
+
+    # count always trigger the COUNT query.
+    assert_queries(1) { topics.count }
+
+    assert topics.loaded?
+  end
 end