Added failing test for multiple savepoints

Author: prathamesh-sonpatki

test/db/sqlite3/transaction_test.rb

@@ -44,4 +44,49 @@ def test_supports_savepoints
     assert_true ActiveRecord::Base.connection.supports_savepoints?
   end
 
+  def test_many_savepoints
+    @first = Entry.create
+    Entry.transaction do
+      @first.content = "One"
+      @first.save!
+
+      begin
+        Entry.transaction :requires_new => true do
+          @first.content = "Two"
+          @first.save!
+
+          begin
+            Entry.transaction :requires_new => true do
+              @first.content = "Three"
+              @first.save!
+
+              begin
+                Entry.transaction :requires_new => true do
+                  @first.content = "Four"
+                  @first.save!
+                  raise
+                end
+              rescue
+              end
+
+              @three = @first.reload.content
+              raise
+            end
+          rescue
+          end
+
+          @two = @first.reload.content
+          raise
+        end
+      rescue
+      end
+
+      @one = @first.reload.content
+    end
+
+    assert_equal "One", @one
+    assert_equal "Two", @two
+    assert_equal "Three", @three
+  end
+
 end