1 files changed, 43 insertions, 0 deletions
diff --git a/spec/arel/engines/sql/unit/relations/alias_spec.rb b/spec/arel/engines/sql/unit/relations/alias_spec.rb
new file mode 100644
index 0000000000..b67a0bbc89
--- /dev/null
+++ b/spec/arel/engines/sql/unit/relations/alias_spec.rb
@@ -0,0 +1,43 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', '..', '..', 'spec_helper')
+
+module Arel
+  describe Alias do
+    before do
+      @relation = Table.new(:users)
+    end
+
+    describe '#to_sql' do
+      describe 'when there is no ambiguity' do
+        it 'does not alias table names anywhere a table name can appear' do
+          sql = @relation                 \
+            .where(@relation[:id].eq(1))  \
+            .order(@relation[:id])        \
+            .project(@relation[:id])      \
+            .group(@relation[:id])        \
+            .alias                        \
+          .to_sql
+
+          adapter_is :mysql do
+            sql.should be_like(%Q{
+              SELECT `users`.`id`
+              FROM `users`
+              WHERE `users`.`id` = 1
+              GROUP BY `users`.`id`
+              ORDER BY `users`.`id` ASC
+            })
+          end
+
+          adapter_is_not :mysql do
+            sql.should be_like(%Q{
+              SELECT "users"."id"
+              FROM "users"
+              WHERE "users"."id" = 1
+              GROUP BY "users"."id"
+              ORDER BY "users"."id" ASC
+            })
+          end
+        end
+      end
+    end
+  end
+end