1 files changed, 16 insertions, 0 deletions
diff --git a/activerecord/test/cases/calculations_test.rb b/activerecord/test/cases/calculations_test.rb
index cf1181e829..f931b39998 100644
--- a/activerecord/test/cases/calculations_test.rb
+++ b/activerecord/test/cases/calculations_test.rb
@@ -487,4 +487,20 @@ class CalculationsTest < ActiveRecord::TestCase
   def test_pluck_with_qualified_column_name
     assert_equal [1,2,3,4], Topic.order(:id).pluck("topics.id")
   end
+
+  def test_pluck_replaces_select_clause
+    taks_relation = Topic.select([:approved, :id]).order(:id)
+    assert_equal [1,2,3,4], taks_relation.pluck(:id)
+    assert_equal [false, true, true, true], taks_relation.pluck(:approved)
+  end
+
+  def test_pluck_auto_table_name_prefix
+    c = Company.create!(:name => "test", :contracts => [Contract.new])
+    assert_equal [c.id], Company.joins(:contracts).pluck(:id)
+  end
+
+  def test_pluck_not_auto_table_name_prefix_if_column_joined
+    Company.create!(:name => "test", :contracts => [Contract.new(:developer_id => 7)])
+    assert_equal [7], Company.joins(:contracts).pluck(:developer_id).map(&:to_i)
+  end
 end