[Rails51] Ensure clean Rails env. Pass /test_establish_connection_using_3_levels_config/

Author: metaskills

test/cases/helper_sqlserver.rb

@@ -23,9 +23,14 @@ class TestCase < ActiveSupport::TestCase
 
     let(:logger) { ActiveRecord::Base.logger }
 
+    setup :ensure_clean_rails_env
 
     private
 
+    def ensure_clean_rails_env
+      Rails.instance_variable_set(:@_env, nil) if defined?(::Rails)
+    end
+
     def host_windows?
       RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
     end