overcome IO.pipe error with binmode

Author: Anna

test/cases/connection_management_test_sqlserver.rb

@@ -0,0 +1,58 @@
+require "cases/sqlserver_helper"
+require "rack"
+
+module ActiveRecord
+  module ConnectionAdapters
+    class ConnectionManagementTest < ActiveRecord::TestCase
+
+    COERCED_TESTS = [:test_connection_pool_per_pid]
+    # Until that patch is made to rails we are preventing this test from running in this gem.
+
+    include SqlserverCoercedTest
+
+    #https://www.ruby-forum.com/topic/4221299
+    def test_coerced_connection_pool_per_pid
+        return skip('must support fork') unless Process.respond_to?(:fork)
+
+        object_id = ActiveRecord::Base.connection.object_id
+
+        rd, wr = IO.pipe
+
+        # #https://www.ruby-forum.com/topic/4221299
+        # puts "rd.internal_encoding:#{rd.internal_encoding}\nrd.external_encoding:#{rd.external_encoding}"
+        # puts "wr.internal_encoding:#{wr.internal_encoding}\nwr.external_encoding:#{wr.external_encoding}"
+        # # rd.internal_encoding:
+        # # rd.external_encoding:UTF-8
+        # # wr.internal_encoding:
+        # # wr.external_encoding:UTF-8
+
+
+        rd.binmode
+        wr.binmode
+
+        #       ERROR
+        # marshal data too short
+        # test/cases/connection_management_test_sqlserver.rb:43:in `load'
+        # test/cases/connection_management_test_sqlserver.rb:43:in `test_coerced_connection_pool_per_pid'
+
+
+        # /Users/acarey/code/nextgear/sqlserver/annaswims/activerecord-sqlserver-adapter/test/cases/connection_management_test_sqlserver.rb:41:in `write': "\x98" from ASCII-8BIT to UTF-8 (Encoding::UndefinedConversionError)
+        #   from /Users/acarey/code/nextgear/sqlserver/annaswims/activerecord-sqlserver-adapter/test/cases/connection_management_test_sqlserver.rb:41:in `block in test_coerced_connection_pool_per_pid'
+        #   from /Users/acarey/code/nextgear/sqlserver/annaswims/activerecord-sqlserver-adapter/test/cases/connection_management_test_sqlserver.rb:38:in `fork'
+        #   from /Users/acarey/code/nextgear/sqlserver/annaswims/activerecord-sqlserver-adapter/test/cases/connection_management_test_sqlserver.rb:38:in `test_coerced_connection_pool_per_pid'
+                pid = fork {
+          rd.close
+          wr.write Marshal.dump ActiveRecord::Base.connection.object_id
+          wr.close
+          exit!
+        }
+
+        wr.close
+
+        Process.waitpid pid
+        assert_not_equal object_id, Marshal.load(rd.read)
+        rd.close
+      end
+    end
+  end
+end