Support ANSI SQL2003 window functions.

1 files changed, 40 insertions, 0 deletions

diff --git a/test/nodes/test_over.rb b/test/nodes/test_over.rb
new file mode 100644
index 0000000000..fcc5078e7b
--- /dev/null
+++ b/test/nodes/test_over.rb
@@ -0,0 +1,40 @@
+require 'helper'
+
+describe Arel::Nodes::Over do
+  describe 'with literal' do
+    it 'should reference the window definition by name' do
+      table = Arel::Table.new :users
+      table[:id].count.over('foo').to_sql.must_be_like %{
+        COUNT("users"."id") OVER "foo"
+      }
+    end
+  end
+
+  describe 'with SQL literal' do
+    it 'should reference the window definition by name' do
+      table = Arel::Table.new :users
+      table[:id].count.over(Arel.sql('foo')).to_sql.must_be_like %{
+        COUNT("users"."id") OVER foo
+      }
+    end
+  end
+
+  describe 'with no expression' do
+    it 'should use empty definition' do
+      table = Arel::Table.new :users
+      table[:id].count.over.to_sql.must_be_like %{
+        COUNT("users"."id") OVER ()
+      }
+    end
+  end
+
+  describe 'with expression' do
+    it 'should use definition in sub-expression' do
+      table = Arel::Table.new :users
+      window = Arel::Nodes::Window.new.order(table['foo'])
+      table[:id].count.over(window).to_sql.must_be_like %{
+        COUNT("users"."id") OVER (ORDER BY \"users\".\"foo\")
+      }
+    end
+  end
+end