From 3ae98181433dda1b5e19910e107494762512a86c Mon Sep 17 00:00:00 2001
From: Yves Senn <yves.senn@gmail.com>
Date: Mon, 5 Jan 2015 10:08:06 +0100
Subject: remove deprecation warning when modifying a Relation with cached
 arel.

This adresses https://github.com/rails/rails/commit/1b7aa62b184c4410c99208f71b59bbac5c5f03be#commitcomment-9147803
---
 activerecord/test/cases/relations_test.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'activerecord/test')

diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 2e2c5ee10b..9631ea79be 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -1651,6 +1651,14 @@ class RelationTest < ActiveRecord::TestCase
     end
   end
 
+  test "relations with cached arel can't be mutated [internal API]" do
+    relation = Post.all
+    relation.count
+
+    assert_raises(ActiveRecord::ImmutableRelation) { relation.limit!(5) }
+    assert_raises(ActiveRecord::ImmutableRelation) { relation.where!("1 = 2") }
+  end
+
   test "relations show the records in #inspect" do
     relation = Post.limit(2)
     assert_equal "#<ActiveRecord::Relation [#{Post.limit(2).map(&:inspect).join(', ')}]>", relation.inspect
-- 
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