Add ActiveRecord::Base.exists? with no args [#1817 state:committed]

Signed-off-by: David Heinemeier Hansson <david@loudthinking.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb
index 7fd7fd7a5b..aac5e6a96b 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -94,7 +94,16 @@ class FinderTest < ActiveRecord::TestCase
 
     assert_raise(NoMethodError) { Topic.exists?([1,2]) }
   end
-
+  
+  def test_exists_returns_true_with_one_record_and_no_args
+    assert Topic.exists?
+  end
+  
+  def test_does_not_exist_with_empty_table_and_no_args_given
+    Topic.delete_all
+    assert !Topic.exists?
+  end
+  
   def test_exists_with_aggregate_having_three_mappings
     existing_address = customers(:david).address
     assert Customer.exists?(:address => existing_address)