1 files changed, 30 insertions, 0 deletions
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 391139d7f8..1f97807f8c 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -967,6 +967,36 @@ module ApplicationTests
       end
     end
 
+    test "Blank config.log_level is not deprecated for non-production environment" do
+      with_rails_env "development" do
+        assert_not_deprecated do
+          make_basic_app do |app|
+            app.config.log_level = nil
+          end
+        end
+      end
+    end
+
+    test "Blank config.log_level is deprecated for the production environment" do
+      with_rails_env "production" do
+        assert_deprecated(/log_level/) do
+          make_basic_app do |app|
+            app.config.log_level = nil
+          end
+        end
+      end
+    end
+
+    test "Not blank config.log_level is not deprecated for the production environment" do
+      with_rails_env "production" do
+        assert_not_deprecated do
+          make_basic_app do |app|
+            app.config.log_level = :info
+          end
+        end
+      end
+    end
+
     test "config.log_level with custom logger" do
       make_basic_app do |app|
         app.config.logger = Logger.new(STDOUT)