Add Nodes::TableAlias#engine

Eventually #engine should go away, but until that time, this means that
Table and Nodes::TableAlias can be used more interchangeably.

1 files changed, 16 insertions, 0 deletions

diff --git a/test/nodes/test_table_alias.rb b/test/nodes/test_table_alias.rb
new file mode 100644
index 0000000000..fef24bb19e
--- /dev/null
+++ b/test/nodes/test_table_alias.rb
@@ -0,0 +1,16 @@
+require 'helper'
+require 'ostruct'
+
+module Arel
+  module Nodes
+    describe 'table alias' do
+      it 'has an #engine which delegates to the relation' do
+        engine   = Object.new
+        relation = OpenStruct.new(:engine => engine)
+
+        node = TableAlias.new relation, :foo
+        node.engine.must_equal engine
+      end
+    end
+  end
+end