[Rails5] Coerce LENGTH function-based test to LEN.

Author: metaskills

test/cases/coerced_tests.rb

@@ -521,6 +521,22 @@ def test_cache_does_not_wrap_string_results_in_arrays_coerced
 
 require 'models/post'
 class RelationTest < ActiveRecord::TestCase
+  # Use LEN vs LENGTH function.
+  coerce_tests! :test_reverse_order_with_function
+  def test_reverse_order_with_function_coerced
+    topics = Topic.order("LEN(title)").reverse_order
+    assert_equal topics(:second).title, topics.first.title
+  end
+
+  # Use LEN vs LENGTH function.
+  coerce_tests! :test_reverse_order_with_function_other_predicates
+  def test_reverse_order_with_function_other_predicates_coerced
+    topics = Topic.order("author_name, LEN(title), id").reverse_order
+    assert_equal topics(:second).title, topics.first.title
+    topics = Topic.order("LEN(author_name), id, LEN(title)").reverse_order
+    assert_equal topics(:fifth).title, topics.first.title
+  end
+
   # We have implicit ordering, via FETCH.
   coerce_tests! %r{doesn't have implicit ordering}