�����JFIF��XX����������    $.' ",#(7),01444'9=82<.342  2!!22222222222222222222222222222222222222222222222222�����"����4���������������������������� ���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������,�PG"Z_�4�˷����kjز�Z�,F+��_z�,�© �����zh6�٨�ic�fu������������������������������������#ډb���_�N��?�����������wQ���5-�~�I���8���������������������������������TK<5o�Iv-������������������k�_U_������������������������������~b�M��d��������Ӝ�U�Hh��?]��E�w��Q���k�{��_}qFW7HTՑ��Y��F�����?_�'ϔ��_�Ջt������������������������=||I �����6�έ"�����D���/[�k�9����Y�8������ds|\���Ҿp6�Ҵ���]��.����6���z<�v��@]�i%������������������������$j��~����g��J>��no����pM[me�i$[�����������s�o�ᘨ�˸ nɜG-�ĨU�ycP���3.DB�li�;���������������������hj���x����7Z^�N�h��������N3u{�:j�����x�힞��#M��&��jL P@��_���� P�������������������&��o8��������9������@Sz���6�t7#O�ߋ �����s}Yf�T������lmr����Z)'N��k�۞p�����w\�T���������������ȯ?�8`���O��i{wﭹW�[�r�� ��Q4F�׊������3m&L�=��h3�������z~��#����\�l :�F,j@�� ʱ�wQT����8�"kJO����6�֚l������������������}����R�>ډK���]��y����&����p�}b������;N�1�m�r$����|��7�>e�@���B�TM*-i�H��g�D�)� E�m�|�ؘbҗ�a���Ҿ����������������t4�����o���G��*oCN�rP���Q��@z,|?W[0���������:�n,j���WiE��W������$~/�hp\��?��{(�0���+�Y8rΟ�+����>S-S���������������VN;���}�s?.����� w��9��˟<���Mq4�Wv'������{)0�1mB����V����W[��������8�/<� �%���wT^�5���b��)iM� p�g�N�&ݝ������������VO~��q���u���9��� ����!��J27�����$����O-���! �:���%H��� ـ�������y�ΠM=t{!S�� �oK8�������t<����è��������:a��������[������ա�H���~��w��Qz`�p����o�^ ������Q��n����� �,uu�C��$ ^���,�������8�#��:�6��e�|~�����������!�3��3.�\0�����q��o�4`.|� ����y�Q�`~;�d�ׯ,��O�Zw�������`73�v�܋�<�����Ȏ�� ـ4k��5�K�a�u�=9Yd��$>x�A�&�� j0� ���vF��� Y���|�y��� ~�6�@c��1vOp��������Ig�����4��l�OD�����L����� R���c���j�_�uX�6��3?nk��Wy�f;^*B� ��@���~a�`��Eu�������+�����6�L��.ü>��}y���}_�O�6�͐�:�Yr���G�X��kG������l^w����������~㒶sy���Iu�!���� W ��X��N�7BV��O��!X�2����wvG�R�f�T#�����t�/?���%8�^�W�aT����G�cL�M���I��(J����1~�8�?aT ���]����AS�E��(��*E}� 2������#I/�׍qz��^t�̔���������b�Yz4x����t�){ OH�����+(E��A&�N�������XT��o��"�XC����'���)}�J�z�p� ����~5�}�^����+�6����w��c��Q�|�Lp�d�H��}�(�.|����k��c4^�����"�����Z?ȕ ��a<�������L�!0�39C� �Eu�����C�F�Ew�ç ;�n?�*o���B�8�bʝ���'#Rqf����M}7����]�������s2tcS{�\icTx;�\��7K���P������ʇ Z O-��~�������c>"��?��������P�����E��O�8��@�8��G��Q�g�a�Վ���󁶠��䧘��_%#r�>�����1�z�a���eb��qcP��ѵ��n���#L��� =��׀t� L�7�`�����V����A{�C:�g���e@�����w1 Xp�3�c3�ġ�������p��M"'-�@n4���fG���B3�DJ�8[Jo�ߐ���gK)ƛ��$���� �������8�3�����+���� �����6�ʻ���� ���S�kI�*KZlT _`�������?��K�����QK�d���������B`�s}�>���`������*�>��,*@J�d�oF*�����弝��O}�k��s��]��y�ߘ�������c1G�V���<=�7��7����6��q�PT��tXԀ�!9*4�4Tހ���3XΛex�46�������Y��D ����� ����BdemDa����\�_l,����G�/���֌7���Y�](�xTt^%�GE�����4�}bT����ڹ�����;��Y)���B�Q��u��>J/J ���⮶.�XԄ��j�ݳ������+E��d ���r�5�_D�����1 ���o�� �B�x�΢�#����<��W�����8���R6�@���g�M�.��� dr�D��>(otU��@�x=��~v���2� ӣ�d�oBd�����3�eO�6�㣷����������ݜ�6��6Y��Qz`����S��{���\P��~z m5{J/L��1������<�e�ͅPu���b�]�ϔ��������'�������f�b� Zpw��c`"��i���BD@:)ִ�:�]��h���v�E��w���T�l�������P����"Ju�}��وV ��J��G6��. J/�Qgl߭�e�����@�z�Zev2u����)]կ���������7x�������s�M�-<ɯ�c��r��v�����@��$�ޮ}lk���a����'����>x��O\�Z������Fu>������ck#��&:��`�$��ai�>2Δ����l���oF[h�������lE�ܺ�Π���k:)���`������� $[6�����9�����kOw�\|�����8}������ބ:��񶐕��������I�A1/���=�2[�,�!��.}gN#�u����b���� ~���������݊��}34q�����d�E��L��������c��$���"�[q�U�硬g^��%B ��z���r�p�������J�ru%v\h�����1Y�ne`������ǥ:g����pQM~�^��Xi� ��`S�:V2������9.�P���V������?B�k�� ��������AEvw%�_�9C�Q����wKekP�ؠ�\������;Io d�{ ߞo�c1eP�����\� `����E=���@K<�Y��������eڼ�J����w����{av�F�'�M�@��������������/J��+9p����|]���������Iw &`���8���&�M�hg���[�{�������Xj���%��Ӓ�������������������$��(�����ʹN�������<>�I���RY�����K2�NPlL�ɀ�)��&e��������B+ь����(������������������� � �JTx����_?EZ� }@���� 6�U���뙢ط�z��dWI��n` D����噥�[��uV��"�G&�����Ú����2�g�}&m���������������������?ċ���"����Om#�������������������������� ��{���������������������ON��"S�X���Ne��ysQ���@�������������Fn��Vg�����dX�~nj����������������������]J�<�K]:����FW���b�������62����������=��5f����JKw����bf�X������������������������55��~J �%^�������:�-�QIE��P��v�nZum� z � ~ə ���� ���ة����;�f��\v�������g�8�1��f2�������������������������4;�V���ǔ�)�������������������9���1\������������������������������c��v�/'Ƞ�w������������������$�4�R-��t����������������������������������� e�6�/�ġ �̕Ecy�J���u�B���<�W�ַ~�w[B1L۲�-JS΂�{���΃�������������������������������������������A��20�c#���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������@���� 0!1@AP"#2Q`$3V�%45a6�FRUq����� ������^7ׅ,$n��������+��F�`��2X'��0vM��p�L=�������5��8������u�p~���.�`r�����\����O��,ư�0oS ��_�M�����l���4�kv\JSd���x���SW�<��Ae�IX����������$I���w�:S���y���›R��9�Q[���,�5�;�@]�%���u�@ *ro�lbI �� ��+���%m:�͇ZV�����u�̉����θau<�fc�.����{�4Ա� �Q����*�Sm��8\ujqs]{kN���)qO�y�_*dJ�b�7���yQqI&9�ԌK!�M}�R�;�������S�T���1���i[U�ɵz�]��U)V�S6���3$K{��ߊ<�(� E]Զ[ǼENg�����'�\?#)Dkf��J���o��v���'�%ƞ�&K�u��!��b�35LX�Ϸ��63$K�a�;�9>,R��W��3�3� d�JeTYE.Mϧ��-�o�j3+y��y^�c�������VO�9NV\nd�1 ��!͕_)a�v;����թ�M�lWR1��)El��P;��yوÏ�u 3�k�5Pr6<�⒲l�!˞*��u־�n�!�l:����UNW ��%��Chx8vL'��X�@��*��)���̮��ˍ��� ����D-M�+J�U�kvK����+�x8��cY������?�Ԡ��~3mo��|�u@[XeY�C�\Kp�x8�oC�C�&����N�~3-H���� ��MX�s�u<`���~"WL��$8ξ��3���a�)|:@�m�\���^�`�@ҷ)�5p+��6���p�%i)P M���ngc�����#0Aruz���RL+xSS?���ʮ}()#�t��mˇ!��0}}y����<�e� �-ή�Ԩ��X������ MF���ԙ~l L.3���}�V뽺�v������멬��Nl�)�2����^�Iq��a��M��qG��T�����c3#������3U�Ǎ���}��לS�|qa��ڃ�+���-��2�f����/��bz��ڐ�� �ݼ[2�ç����k�X�2�* �Z�d���J�G����M*9W���s{��w���T��x��y,�in�O�v��]���n����P�$��JB@=4�OTI�n��e�22a\����q�d���%�$��(���:���: /*�K[PR�fr\nڙdN���F�n�$�4��[�� U�zƶ����� �mʋ���,�ao�u 3�z� �x��Kn����\[��VFmbE;�_U��&V�Gg�]L�۪&#n%�$ɯ��dG���D�TI=�%+AB�Ru#��b4�1�»x�cs�YzڙJG��f��Il���d�eF'T� iA��T���uC�$����Y��H?����[!G`}���ͪ� �纤Hv\������j�Ex�K���!���OiƸ�Yj�+u-<���'q����uN�*�r\��+�]���<�wOZ.fp�ێ��,-*)V?j-kÊ#�`�r��dV����(�ݽBk�����G�ƛk�QmUڗe��Z���f}|����8�8��a���i��3'J�����~G_�^���d�8w������ R�`(�~�.��u���l�s+g�bv���W���lGc}��u���afE~1�Ue������Z�0�8�=e�� f@/�jqEKQQ�J���oN��J���W5~M>$6�Lt�;$ʳ{���^��6�{����v6���ķܰg�V�cnn �~z�x�«�,2�u�?cE+Ș�H؎�%�Za�)���X>uW�Tz�Nyo����s���FQƤ��$��*�&�LLXL)�1�" L��eO��ɟ�9=���:t��Z���c��Ž���Y?�ӭV�wv�~,Y��r�ۗ�|�y��GaF�����C�����.�+� ���v1���fήJ�����]�S��T��B��n5sW}y�$��~z�'�c ��8 ��� ,! �p��VN�S��N�N�q��y8z˱�A��4��*��'������2n<�s���^ǧ˭P�Jޮɏ�U�G�L�J�*#��<�V��t7�8����TĜ>��i}K%,���)[��z�21z ?�N�i�n1?T�I�R#��m-�����������������1����lA�`��fT5+��ܐ�c�q՝��ʐ��,���3�f2U�եmab��#ŠdQ�y>\��)�SLY����w#��.���ʑ�f��� ,"+�w�~�N�'�c�O�3F�������N<���)j��&��,-� �љ���֊�_�zS���TǦ����w�>��?�������n��U仆�V���e�����0���$�C�d���rP �m�׈e�Xm�Vu� �L��.�bֹ��� �[Դaզ���*��\y�8�Է:�Ez\�0�Kq�C b��̘��cө���Q��=0Y��s�N��S.����3.���O�o:���#���v7�[#߫ ��5�܎�L���Er4���9n��COWlG�^��0k�%<���ZB���aB_���������'=��{i�v�l�$�uC���mƎҝ{�c㱼�y]���W�i ��ߧc��m�H� m�"�"�����;Y�ߝ�Z�Ǔ�����:S#��|}�y�,/k�Ld� TA�(�AI$+I3��;Y*���Z��}|��ӧO��d�v��..#:n��f>�>���ȶI�TX��� 8��y����"d�R�|�)0���=���n4��6ⲑ�+��r<�O�܂~zh�z����7ܓ�HH�Ga롏���nCo�>������a ���~]���R���̲c?�6(�q�;5%� |�uj�~z8R�=X��I�V=�|{v�Gj\gc��q����z�؋%M�ߍ����1y��#��@f^���^�>N������#x#۹��6�Y~�?�dfPO��{��P�4��V��u1E1J �*|���%����JN��`eWu�zk M6���q t[�� ��g�G���v��WIG��u_ft����5�j�"�Y�:T��ɐ���*�;� e5���4����q$C��2d�}���� _S�L#m�Yp��O�.�C�;��c����Hi#֩%+) �Ӎ��ƲV���SYź��g |���tj��3�8���r|���V��1#;.SQ�A[���S������#���`n�+���$��$�I �P\[�@�s��(�ED�z���P��])8�G#��0B��[ى��X�II�q<��9�~[Z멜�Z�⊔IWU&A>�P~�#��dp<�?����7���c��'~���5 ��+$���lx@�M�dm��n<=e�dyX��?{�|Aef ,|n3�<~z�ƃ�uۧ�����P��Y,�ӥQ�*g�#먙R�\���;T��i,��[9Qi歉����c>]9�� ��"�c��P�� �Md?٥��If�ت�u��k��/����F��9�c*9��Ǎ:�ØF���z�n*�@|I�ށ9����N3{'��[�'ͬ�Ҳ4��#}��!�V� Fu��,�,mTIk���v C�7v���B�6k�T9��1�*l� '~��ƞF��lU��'�M ����][ΩũJ_�{�i�I�n��$����L�� j��O�dx�����kza۪��#�E��Cl����x˘�o�����V���ɞ�ljr��)�/,�߬h�L��#��^��L�ф�,íMƁe�̩�NB�L�����iL����q�}��(��q��6IçJ$�W�E$��:������=#����(�K�B����zђ <��K(�N�۫K�w��^O{!����)��H���>x�������lx�?>Պ�+�>�W���,Ly!_�D���Ō�l���Q�!�[ �S����J��1��Ɛ�Y}��b,+�Lo�x�ɓ)����=�y�oh�@�꥟/��I��ѭ=��P�y9��� �ۍYӘ�e+�p�Jnϱ?V\SO%�(�t� ���=?MR�[Ș�����d�/ ��n�l��B�7j� ��!�;ӥ�/�[-���A�>��dN�sLj ��,ɪv��=1c�.SQ�O3�U���ƀ�ܽ�E����������̻��9G�ϷD�7(�}��Ävӌ\��y�_0[w ���<΍>����a_��[0+�L��F.�޺��f�>oN�T����q;���y\��bՃ��y�jH�<|q-eɏ�_?_9+P���Hp$�����[ux�K w�Mw��N�ی'$Y2�=��q���KB��P��~�������Yul:�[<����F1�2�O���5=d����]Y�sw:���Ϯ���E��j,_Q��X��z`H1,#II ��d�wr��P˂@�ZJV����y$�\y�{}��^~���[:N����ߌ�U�������O��d�����ؾe��${p>G��3c���Ė�lʌ�� ת��[��`ϱ�-W����dg�I��ig2��� ��}s ��ؤ(%#sS@���~���3�X�nRG�~\jc3�v��ӍL��M[JB�T��s3}��j�Nʖ��W����;7���ç?=X�F=-�=����q�ߚ���#���='�c��7���ڑW�I(O+=:uxq�������������e2�zi+�kuG�R��������0�&e�n���iT^J����~\jy���p'dtG��s����O��3����9* �b#Ɋ�� p������[Bws�T�>d4�ۧs���nv�n���U���_�~,�v����ƜJ1��s�� �QIz���)�(lv8M���U=�;����56��G���s#�K���MP�=��LvyGd��}�VwWBF�'�à �?MH�U�g2�� ����!�p�7Q��j��ڴ����=��j�u��� Jn�A s���uM������e��Ɔ�Ҕ�!)�'��8Ϣ�ٔ���ޝ(��Vp���צ֖d=�IC�J�Ǡ{q������kԭ�߸���i��@K����u�|�p=..�*+����x�����z[Aqġ#s2a�Ɗ���RR�)*HRsi�~�a &f��M��P����-K�L@��Z��Xy�'x�{}��Zm+���:�)�) IJ�-i�u���� ���ܒH��'��L(7�y�GӜq���� j��� 6ߌg1�g�o���,kر���tY�?W,���p���e���f�OQS��!K�۟cҒA�|ս�j�>��=⬒��˧L[�� �߿2JaB~R��u�:��Q�] �0H~���]�7��Ƽ�I���(�}��cq '�ήET���q�?f�ab���ӥvr� �)o��-Q��_'����ᴎo��K������;��V���o��%���~OK ����*��b�f:���-ťIR��`B�5!RB@���ï�� �u �̯e\�_U�_������� g�ES��3��������QT��a�����x����U<~�c?�*�#]�MW,[8O�a�x��]�1bC|踤�P��lw5V%�)�{t�<��d��5���0i�XSU��m:��Z�┵�i�"��1�^B�-��P�hJ��&)O��*�D��c�W��vM��)����}���P��ܗ-q����\mmζZ-l@�}��a��E�6��F�@��&Sg@���ݚ�M����� ȹ 4����#p�\H����dYDo�H���"��\��..R�B�H�z_�/5˘����6��KhJR��P�mƶi�m���3��,#c�co��q�a)*P�t����R�m�k�7x�D�E�\Y�閣_X�<���~�)���c[[�BP����6�Yq���S��0����%_����;��Àv�~�| VS؇ ��'O0��F0��\���U�-�d@�����7�SJ*z��3n��y��P����O����������m�~�P�3|Y��ʉr#�C�<�G~�.,! ���bqx���h~0=��!ǫ�jy����l��O,�[B��~��|9��ٱ����Xly�#�i�B��g%�S��������tˋ���e���ې��\[d�t)��.+u�|1 ������#�~Oj����hS�%��i.�~X���I�H�m��0n���c�1uE�q��cF�RF�o���7� �O�ꮧ� ���ۛ{��ʛi5�rw?׌#Qn�TW��~?y$��m\�\o����%W� ?=>S�N@�� �Ʈ���R����N�)�r"C�:��:����� �����#��qb��Y�. �6[��2K����2u�Ǧ�HYR��Q�MV��� �G�$��Q+.>�����nNH��q�^��� ����q��mM��V��D�+�-�#*�U�̒ ���p욳��u:�������IB���m����PV@O���r[b= �� ��1U�E��_Nm�yKbN�O���U�}�the�`�|6֮P>�\2�P�V���I�D�i�P�O;�9�r�mAHG�W�S]��J*�_�G��+kP�2����Ka�Z���H�'K�x�W�MZ%�O�YD�Rc+o��?�q��Ghm��d�S�oh�\�D�|:W������UA�Qc yT�q��������~^�H��/��#p�CZ���T�I�1�ӏT����4��"�ČZ�����}��`w�#�*,ʹ�� ��0�i��課�Om�*�da��^gJ݅{���l�e9uF#T�ֲ��̲�ٞC"�q���ߍ ոޑ�o#�XZTp����@ o�8��(jd��xw�]�,f���`~��|,s��^����f�1���t��|��m�򸄭/ctr��5s��7�9Q�4�H1꠲BB@�l9@���C�����+�wp�xu�£Yc�9��?`@#�o�mH�s2��)�=��2�.�l����jg�9$�Y�S�%*L������R�Y������7Z���,*=�䷘$�������arm�o�ϰ���UW.|�r�uf����IGw�t����Zwo��~5 ��YյhO+=8fF�)�W�7�L9lM�̘·Y���֘YLf�큹�pRF���99.A �"wz��=E\Z���'a� 2��Ǚ�#;�'}�G���*��l��^"q��+2FQ� hj��kŦ��${���ޮ-�T�٭cf�|�3#~�RJ����t��$b�(R��(����r���dx� >U b�&9,>���%E\� Ά�e�$��'�q't��*�א���ެ�b��-|d���SB�O�O��$�R+�H�)�܎�K��1m`;�J�2�Y~9��O�g8=vqD`K[�F)k�[���1m޼c��n���]s�k�z$@��)!I �x՝"v��9=�ZA=`Ɠi �:�E��)`�7��vI��}d�YI�_ �o�:ob���o ���3Q��&D&�2=�� �Ά��;>�h����y.*ⅥS������Ӭ�+q&����j|UƧ�����}���J0��WW< ۋS�)jQR�j���Ư��rN)�Gű�4Ѷ(�S)Ǣ�8��i��W52���No˓� ۍ%�5brOn�L�;�n��\G����=�^U�dI���8$�&���h��'���+�(������cȁ߫k�l��S^���cƗjԌE�ꭔ��gF���Ȓ��@���}O���*;e�v�WV���YJ\�]X'5��ղ�k�F��b 6R�o՜m��i N�i�����>J����?��lPm�U��}>_Z&�KK��q�r��I�D�Չ~�q�3fL�:S�e>���E���-G���{L�6p�e,8��������QI��h��a�Xa��U�A'���ʂ���s�+טIjP�-��y�8ۈZ?J$��W�P� ��R�s�]��|�l(�ԓ��sƊi��o(��S0���Y� 8�T97.�����WiL��c�~�dxc�E|�2!�X�K�Ƙਫ਼�$((�6�~|d9u+�qd�^3�89��Y�6L�.I�����?���iI�q���9�)O/뚅����O���X��X�V��ZF[�یgQ�L��K1���RҖr@v�#��X�l��F���Нy�S�8�7�kF!A��sM���^rkp�jP�DyS$N���q���nxҍ!U�f�!eh�i�2�m����`�Y�I�9r�6� �TF���C}/�y�^���Η���5d�'��9A-��J��>{�_l+�`��A���[�'��յ�ϛ#w:݅�%��X�}�&�PSt�Q�"�-��\縵�/����$Ɨh�Xb�*�y��BS����;W�ջ_mc�����vt?2}1�;qS�d�d~u:2k5�2�R�~�z+|HE!)�Ǟl��7`��0�<�,�2*���Hl-��x�^����'_TV�gZA�'j� ^�2Ϊ��N7t�����?w�� �x1��f��Iz�C-Ȗ��K�^q�;���-W�DvT�7��8�Z�������� hK�(P:��Q- �8�n�Z���܃e貾�<�1�YT<�,�����"�6{�/ �?�͟��|1�:�#g��W�>$����d��J��d�B���=��jf[��%rE^��il:��B���x���Sּ�1հ��,�=��*�7 fcG��#q� �eh?��2�7�����,�!7x��6�n�LC�4x��},Geǝ�tC.��vS �F�43��zz\��;QYC,6����~;RYS/6���|2���5���v��T��i����������mlv��������&� �nRh^ejR�LG�f���? �ۉҬܦƩ��|��Ȱ����>3����!v��i�ʯ�>�v��オ�X3e���_1z�Kȗ\<������!�8���V��]��?b�k41�Re��T�q��mz��TiOʦ�Z��Xq���L������q"+���2ۨ��8}�&N7XU7Ap�d�X��~�׿��&4e�o�F��� �H�����O���č�c�� 懴�6���͉��+)��v;j��ݷ�� �UV�� i��� j���Y9GdÒJ1��詞�����V?h��l�����l�cGs�ځ�������y�Ac������\V3�? �� ܙg�>qH�S,�E�W�[�㺨�uch�⍸�O�}���a��>�q�6�n6�����N6�q��������N� ���! 1AQaq�0@����"2BRb�#Pr���3C`��Scst���$4D���%Td���� ?�����N����a��3��m���C���w��������xA�m�q�m����m������$����4n淿t'��C"w��zU=D�\R+w�p+Y�T�&�պ@��ƃ��3ޯ?�Aﶂ��aŘ���@-�����Q�=���9D��ռ�ѻ@��M�V��P��܅�G5�f�Y<�u=,EC)�<�Fy'�"�&�չ�X~f��l�KԆV��?�� �W�N����=(� �;���{�r����ٌ�Y���h{�١������jW����P���Tc�����X�K�r��}���w�R��%��?���E��m�� �Y�q|����\lEE4����r���}�lsI�Y������f�$�=�d�yO����p�����yBj8jU�o�/�S��?�U��*������ˍ�0�������u�q�m [�?f����a�� )Q�>����6#������� ?����0UQ����,IX���(6ڵ[�DI�MNލ�c&���υ�j\��X�R|,4��� j������T�hA�e��^���d���b<����n�� �즇�=!���3�^�`j�h�ȓr��jẕ�c�,ٞX����-����a�ﶔ���#�$��]w�O��Ӫ�1y%��L�Y<�wg#�ǝ�̗`�x�xa�t�w��»1���o7o5��>�m뭛C���Uƃߜ}�C���y1Xνm�F8�jI���]����H���ۺиE@I�i;r�8ӭ�����V�F�Շ| ��&?�3|x�B�MuS�Ge�=Ӕ�#BE5G������Y!z��_e��q�р/W>|-�Ci߇�t�1ޯќd�R3�u��g�=0 5��[?�#͏��q�cf���H��{ ?u�=?�?ǯ���}Z��z���hmΔ�BFTW�����<�q��(v� ��!��z���iW]*�J�V�z��gX֧A�q�&��/w���u�gYӘa���; �i=����g:��?2�dž6�ى�k�4�>�Pxs����}������G�9���3 ���)gG�R<>r h�$��'nc�h�P��Bj��J�ҧH� -��N1���N��?��~��}-q!=��_2hc�M��l�vY%UE�@|�v����M2�.Y[|y�"Eï��K�ZF,�ɯ?,q�?v�M 80jx�"�;�9vk�����+ ֧�� �ȺU��?�%�vcV��mA�6��Qg^M�����A}�3�nl� QRN�l8�kkn�'�����(��M�7m9و�q���%ޟ���*h$Zk"��$�9��: �?U8�Sl��,,|ɒ��xH(ѷ����Gn�/Q�4�P��G�%��Ա8�N��!� �&�7�;���eKM7�4��9R/%����l�c>�x;������>��C�:�����t��h?aKX�bhe�ᜋ^�$�Iհ �hr7%F$�E��Fd���t��5���+�(M6�t����Ü�UU|zW�=a�Ts�Tg������dqP�Q����b'�m���1{|Y����X�N��b �P~��F^F:����k6�"�j!�� �I�r�`��1&�-$�Bevk:y���#y�w��I0��x��=D�4��tU���P�ZH��ڠ底taP��6����b>�xa�����Q�#� WeF��ŮNj�p�J* mQ�N�����*I�-*�ȩ�F�g�3 �5��V�ʊ�ɮ�a��5F���O@{���NX��?����H�]3��1�Ri_u��������ѕ�� ����0��� F��~��:60�p�͈�S��qX#a�5>���`�o&+�<2�D����: �������ڝ�$�nP���*)�N�|y�Ej�F�5ټ�e���ihy�Z �>���k�bH�a�v��h�-#���!�Po=@k̆IEN��@��}Ll?j�O������߭�ʞ���Q|A07x���wt!xf���I2?Z��<ץ�T���cU�j��]���陎Ltl �}5�ϓ��$�,��O�mˊ�;�@O��jE��j(�ا,��LX���LO���Ц�90�O �.����a��nA���7������j4 ��W��_ٓ���zW�jcB������y՗+EM�)d���N�g6�y1_x��p�$Lv�:��9�"z��p���ʙ$��^��JԼ*�ϭ����o���=x�Lj�6�J��u82�A�H�3$�ٕ@�=Vv�]�'�qEz�;I˼��)��=��ɯ���x �/�W(V���p�����$ �m�������u�����񶤑Oqˎ�T����r��㠚x�sr�GC��byp�G��1ߠ�w e�8�$⿄����/�M{*}��W�]˷.�CK\�ުx���/$�WP�w���r� |i���&�}�{�X� �>��$-��l���?-z���g����lΆ���(F���h�vS*���b���߲ڡn,|)mrH[���a�3�ר�[1��3o_�U�3�TC�$��(�=�)0�kgP���� ��u�^=��4 �WYCҸ:��vQ�ר�X�à��tk�m,�t*��^�,�}D*�� �"(�I��9R����>`�`��[~Q]�#af��i6l��8���6�:,s�s�N6�j"�A4���IuQ��6E,�GnH��zS�HO�uk�5$�I�4��ؤ�Q9�@��C����wp��BGv[]�u�Ov����0I4���\��y�����Q�Ѹ��~>Z��8�T��a��q�ޣ;z��a���/��S��I:�ܫ_�|������>=Z����8:�S��U�I�J��"IY���8%b8���H��:�QO�6�;7�I�S��J��ҌAά3��>c���E+&jf$eC+�z�;��V����� �r���ʺ������my�e���aQ�f&��6�ND���.:��NT�vm�<- u���ǝ\MvZY�N�NT��-A�>jr!S��n�O 1�3�Ns�%�3D@���`������ܟ 1�^c<���� �a�ɽ�̲�Xë#�w�|y�cW�=�9I*H8�p�^(4���՗�k��arOcW�tO�\�ƍR��8����'�K���I�Q�����?5�>[�}��yU�ײ -h��=��% q�ThG�2�)���"ו3]�!kB��*p�FDl�A���,�eEi�H�f�Ps�����5�H:�Փ~�H�0Dت�D�I����h�F3�������c��2���E��9�H��5�zԑ�ʚ�i�X�=:m�xg�hd(�v����׊�9iS��O��d@0ڽ���:�p�5�h-��t�&���X�q�ӕ,��ie�|���7A�2���O%P��E��htj��Y1��w�Ѓ!����  ���� ࢽ��My�7�\�a�@�ţ�J ��4�Ȼ�F�@o�̒?4�wx��)��]�P��~�����u�����5�����7X ��9��^ܩ�U;Iꭆ 5 �������eK2�7(�{|��Y׎ �V��\"���Z�1� Z�����}��(�Ǝ"�1S���_�vE30>���p;� ΝD��%x�W�?W?v����o�^V�i�d��r[��/&>�~`�9Wh��y�;���R���� ;;ɮT��?����r$�g1�K����A��C��c��K��l:�'��3 c�ﳯ*"t8�~l��)���m��+U,z��`(��>yJ�?����h>��]��v��ЍG*�{`��;y]��I�T� ;c��NU�fo¾h���/$���|NS���1�S�"�H��V���T���4��uhǜ�]�v;���5�͠x��'C\�SBpl���h}�N����� A�Bx���%��ޭ�l��/����T��w�ʽ]D�=����K���ž�r㻠l4�S�O?=�k �M:� ��c�C�a�#ha���)�ѐxc�s���gP�iG���{+���x���Q���I= �� z��ԫ+ �8"�k�ñ�j=|����c ��y��CF��/���*9ж�h{ �?4�o� ��k�m�Q�N�x��;�Y��4膚�a�w?�6�>�e]�����Q�r�:����g�,i"�����ԩA��*M�<�G��b�if��l^M��5�� �Ҩ�{����6J��ZJ�����P�*�����Y���ݛu�_4�9�I8�7���������,^ToR���m4�H��?�N�S�ѕw��/S��甍�@�9H�S�T��t�ƻ���ʒU��*{Xs�@����f������֒Li�K{H�w^���������Ϥm�tq���s� ���ք��f:��o~s��g�r��ט� �S�ѱC�e]�x���a��) ���(b-$(�j>�7q�B?ӕ�F��hV25r[7 Y� }L�R��}����*sg+��x�r�2�U=�*'WS��ZDW]�WǞ�<��叓���{�$�9Ou4��y�90-�1�'*D`�c�^o?(�9��u���ݐ��'PI&� f�Jݮ�������:wS����jfP1F:X �H�9dԯ����˝[�_54 �}*;@�ܨ�� ð�yn�T���?�ןd�#���4rG�ͨ��H�1�|-#���Mr�S3��G�3�����)�.᧏3v�z֑��r����$G"�`j �1t��x0<Ɔ�Wh6�y�6��,œ�Ga��gA����y��b��)���h�D��ß�_�m��ü �gG;��e�v��ݝ�nQ� ��C����-�*��o���y�a��M��I�>�<���]obD��"�:���G�A��-\%LT�8���c�)��+y76���o�Q�#*{�(F�⽕�y����=���rW�\p���۩�c���A���^e6��K������ʐ�cVf5$�'->���ՉN"���F�"�UQ@�f��Gb~��#�&�M=��8�ט�JNu9��D��[̤�s�o�~������� G��9T�tW^g5y$b��Y'��س�Ǵ�=��U-2 #�MC�t(�i� �lj�@Q 5�̣i�*�O����s�x�K�f��}\��M{E�V�{�υ��Ƈ�����);�H����I��fe�Lȣr�2��>��W��I�Ȃ6������i��k�� �5�YOxȺ����>��Y�f5'��|��H+��98pj�n�.O�y�������jY��~��i�w'������l�;�s�2��Y��:'lg�ꥴ)o#'Sa�a�K��Z� �m��}�`169�n���"���x��I ��*+� }F<��cГ���F�P�������ֹ*�PqX�x۩��,� ��N�� �4<-����%����:��7����W���u�`����� $�?�I��&����o��o��`v�>��P��"��l���4��5'�Z�gE���8���?��[�X�7(��.Q�-��*���ތL@̲����v��.5���[��=�t\+�CNܛ��,g�SQnH����}*F�G16���&:�t��4ُ"A��̣��$�b �|����#rs��a�����T�� ]�<�j��B�S�('$�ɻ� �wP;�/�n��?�ݜ��x�F��yUn�~mL*-�������Xf�wd^�a�}��f�,=t�׵i�.2/wpN�Ep8�OР���•��R�FJ� 55TZ��T �ɭ�<��]��/�0�r�@�f��V��V����Nz�G��^���7hZi����k��3�,kN�e|�vg�1{9]_i��X5y7� 8e]�U����'�-2,���e"����]ot�I��Y_��n�(JҼ��1�O ]bXc���Nu�No��pS���Q_���_�?i�~�x h5d'�(qw52] ��'ޤ�q��o1�R!���`ywy�A4u���h<קy���\[~�4�\ X�Wt/� 6�����n�F�a8��f���z �3$�t(���q��q�x��^�XWeN'p<-v�!�{�(>ӽDP7��ո0�y)�e$ٕv�Ih'Q�EA�m*�H��RI��=:��� ���4牢) �%_iN�ݧ�l]� �Nt���G��H�L��� ɱ�g<���1V�,�J~�ٹ�"K��Q�� 9�HS�9�?@��k����r�;we݁�]I�!{ �@�G�[�"��`���J:�n]�{�cA�E����V��ʆ���#��U9�6����j�#Y�m\��q�e4h�B�7��C�������d<�?J����1g:ٳ���=Y���D�p�ц� ׈ǔ��1�]26؜oS�'��9�V�FVu�P�h�9�xc�oq�X��p�o�5��Ա5$�9W�V(�[Ak�aY錎qf;�'�[�|���b�6�Ck��)��#a#a˙��8���=äh�4��2��C��4tm^ �n'c����]GQ$[Wҿ��i���vN�{Fu ��1�gx��1┷���N�m��{j-,��x�� Ūm�ЧS�[�s���Gna���䑴�� x�p 8<������97�Q���ϴ�v�aϚG��Rt�Һ׈�f^\r��WH�JU�7Z���y)�vg=����n��4�_)y��D'y�6�]�c�5̪��\� �PF�k����&�c;��cq�$~T�7j ���nç]�<�g ":�to�t}�159�<�/�8������m�b�K#g'I'.W������6��I/��>v��\�MN��g���m�A�yQL�4u�Lj�j9��#44�t��l^�}L����n��R��!��t��±]��r��h6ٍ>�yҏ�N��fU�� ���� Fm@�8}�/u��jb9������he:A�y�ծw��GpΧh�5����l}�3p468��)U��d��c����;Us/�֔�YX�1�O2��uq�s��`hwg�r~�{ R��mhN��؎*q 42�*th��>�#���E����#��Hv�O����q�}������6�e��\�,Wk�#���X��b>��p}�դ��3���T5��†��6��[��@��P�y*n��|'f�֧>�lư΂�̺����SU�'*�q�p�_S�����M�� '��c�6������m�� ySʨ;M��r���Ƌ�m�Kxo,���Gm�P��A�G�:��i��w�9�}M(�^�V��$ǒ�ѽ�9���|���� �a����J�SQ�a���r�B;����}���ٻ֢�2�%U���c�#�g���N�a�ݕ�'�v�[�OY'��3L�3�;,p�]@�S��{ls��X�'���c�jw��k'a�.��}�}&�� �dP�*�bK=ɍ!����;3n�gΊU�ߴmt�'*{,=SzfD� A��ko~�G�aoq�_mi}#�m�������P�Xhύ�����mxǍ�΂���巿zf��Q���c���|kc�����?���W��Y�$���_Lv����l߶��c���`?����l�j�ݲˏ!V��6����U�Ђ(A���4y)H���p�Z_�x��>���e���R��$�/�`^'3qˏ�-&Q�=?��CFVR �D�fV�9��{�8g�������n�h�(P"��6�[�D���< E�����~0<@�`�G�6����Hг�cc�� �c�K.5��D��d�B���`?�XQ��2��ٿyqo&+�1^� DW�0�ꊩ���G�#��Q�nL3��c���������/��x ��1�1�[y�x�პCW��C�c�UĨ80�m�e�4.{�m��u���I=��f�����0QRls9���f���������9���~f�����Ǩ��a�"@�8���ȁ�Q����#c�ic������G��$���G���r/$W�(��W���V�"��m�7�[m�A�m����bo��D� j����۳� l���^�k�h׽����� ��#� iXn�v��eT�k�a�^Y�4�BN���ĕ���0������� !01@Q"2AaPq3BR�������?�����@4�Q�����T3,���㺠�W�[=JK�Ϟ���2�r^7��vc�:�9 �E�ߴ�w�S#d���Ix��u��:��Hp��9E!�� V 2;73|F��9Y���*ʬ�F��D����u&���y؟��^EA��A��(ɩ���^��GV:ݜDy�`��Jr29ܾ�㝉��[���E;Fzx��YG��U�e�Y�C���� ����v-tx����I�sם�Ę�q��Eb�+P\ :>�i�C'�;�����k|z�رn�y]�#ǿb��Q��������w�����(�r|ӹs��[�D��2v-%��@;�8<a���[\o[ϧw��I!��*0�krs)�[�J9^��ʜ��p1)� "��/_>��o��<1����A�E�y^�C��`�x1'ܣn�p��s`l���fQ��):�l����b>�Me�jH^?�kl3(�z:���1ŠK&?Q�~�{�ٺ�h�y���/�[��V�|6��}�KbX����mn[-��7�5q�94�������dm���c^���h� X��5��<�eޘ>G���-�}�دB�ޟ� ��|�rt�M��V+�]�c?�-#ڛ��^ǂ}���Lkr���O��u�>�-D�ry� D?:ޞ�U��ǜ�7�V��?瓮�"�#���r��չģVR;�n���/_� ؉v�ݶe5d�b9��/O��009�G���5n�W����JpA�*�r9�>�1��.[t���s�F���nQ� V 77R�]�ɫ8����_0<՜�IF�u(v��4��F�k�3��E)��N:��yڮe��P�`�1}�$WS��J�SQ�N�j��ٺ��޵�#l���ј(�5=��5�lǏmoW�v-�1����v,W�mn��߀$x�<����v�j(����c]��@#��1������Ǔ���o'��u+����;G�#�޸��v-lη��/(`i⣍Pm^����ԯ̾9Z��F��������n��1��� ��]�[��)�'�������:�֪�W��FC����� �B9،!?���]��V��A�Վ�M��b�w��G F>_DȬ0¤�#�QR�[V��kz���m�w�"��9ZG�7'[��=�Q����j8R?�zf�\a�=��O�U����*oB�A�|G���2�54 �p��.w7� �� ���&������ξxGHp� B%��$g�����t�Џ򤵍z���HN�u�Я�-�'4��0���;_���3������� !01"@AQa2Pq#3BR�������?����ʩca��en��^��8���<�u#��m*08r��y�N"�<�Ѳ0��@\�p��� �����Kv�D��J8�Fҽ� �f�Y��-m�ybX�NP����}�!*8t(�OqѢ��Q�wW�K��ZD��Δ^e��!� ��B�K��p~�����e*l}z#9ң�k���q#�Ft�o��S�R����-�w�!�S���Ӥß|M�l޶V��!eˈ�8Y���c�ЮM2��tk���� ������J�fS����Ö*i/2�����n]�k�\���|4yX�8��U�P.���Ы[���l��@"�t�<������5�lF���vU�����W��W��;�b�cД^6[#7@vU�xgZv��F�6��Q,K�v��� �+Ъ��n��Ǣ��Ft���8��0��c�@�!�Zq s�v�t�;#](B��-�nῃ~���3g������5�J�%���O������n�kB�ĺ�.r��+���#�N$?�q�/�s�6��p��a����a��J/��M�8��6�ܰ"�*������ɗud"\w���aT(����[��F��U՛����RT�b���n�*��6���O��SJ�.�ij<�v�MT��R\c��5l�sZB>F��<7�;EA��{��E���Ö��1U/�#��d1�a�n.1ě����0�ʾR�h��|�R��Ao�3�m3 ��%�� ���28Q�� ��y��φ���H�To�7�lW>����#i`�q���c����a��� �m,B�-j����݋�'mR1Ήt�>��V��p���s�0IbI�C.���1R�ea�����]H�6�����������4B>��o��](��$B���m�����a�!=���?�B� K�Ǿ+�Ծ"�n���K��*��+��[T#�{�E�J�S����Q�����s�5�:�U�\wĐ�f�3����܆&�)�����I���Ԇw��E T�lrTf6Q|R�h:��[K�� �z��c֧�G�C��%\��_�a��84��HcO�bi��ؖV��7H �)*ģK~Xhչ0��4?�0��� �E<���}3���#���u�?�� ��|g�S�6ꊤ�|�I#Hڛ� �ա��w�X��9��7���Ŀ%�SL��y6č��|�F�a 8���b���$�sק�h���b9RAu7�˨p�Č�_\*w��묦��F ����4D~�f����|(�"m���NK��i�S�>�$d7SlA��/�²����SL��|6N�}���S�˯���g��]6��; �#�.��<���q'Q�1|KQ$�����񛩶"�$r�b:���N8�w@��8$�� �AjfG|~�9F ���Y��ʺ��Bwؒ������M:I岎�G��`s�YV5����6��A �b:�W���G�q%l�����F��H���7�������Fsv7���k�� 403WebShell
403Webshell
Server IP : 93.127.173.102  /  Your IP : 216.73.216.150
Web Server : LiteSpeed
System : Linux in-mum-web1874.main-hosting.eu 5.14.0-570.21.1.el9_6.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jun 11 07:22:35 EDT 2025 x86_64
User : u862839997 ( 862839997)
PHP Version : 8.2.30
Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail
MySQL : OFF  |  cURL : ON  |  WGET : ON  |  Perl : OFF  |  Python : OFF  |  Sudo : OFF  |  Pkexec : OFF
Directory :  /opt/go/pkg/mod/go.mongodb.org/mongo-driver@v1.14.0/mongo/integration/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :


[ Back ]     

Current File : /opt/go/pkg/mod/go.mongodb.org/mongo-driver@v1.14.0/mongo/integration//change_stream_test.go
// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

package integration

import (
	"context"
	"strings"
	"sync"
	"testing"
	"time"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/event"
	"go.mongodb.org/mongo-driver/internal/assert"
	"go.mongodb.org/mongo-driver/internal/eventtest"
	"go.mongodb.org/mongo-driver/internal/require"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/integration/mtest"
	"go.mongodb.org/mongo-driver/mongo/options"
)

type resumeType int
type streamType int

const (
	minChangeStreamVersion = "3.6.0"
	minPbrtVersion         = "4.0.7"
	minStartAfterVersion   = "4.1.1"

	startAfter resumeType = iota
	resumeAfter
	operationTime

	client streamType = iota
	database
	collection

	errorInterrupted     int32 = 11601
	errorHostUnreachable int32 = 6

	resumableChangeStreamError = "ResumableChangeStreamError"
)

func TestChangeStream_Standalone(t *testing.T) {
	mtOpts := mtest.NewOptions().MinServerVersion(minChangeStreamVersion).CreateClient(false).Topologies(mtest.Single)
	mt := mtest.New(t, mtOpts)

	mt.Run("no custom standalone error", func(mt *mtest.T) {
		_, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		_, ok := err.(mongo.CommandError)
		assert.True(mt, ok, "expected error type %T, got %T", mongo.CommandError{}, err)
	})
}

func TestChangeStream_ReplicaSet(t *testing.T) {
	mtOpts := mtest.NewOptions().MinServerVersion(minChangeStreamVersion).CreateClient(false).Topologies(mtest.ReplicaSet)
	mt := mtest.New(t, mtOpts)

	mt.Run("first stage is $changeStream", func(mt *mtest.T) {
		// first stage in the aggregate pipeline must be $changeStream

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)
		started := mt.GetStartedEvent()
		assert.NotNil(mt, started, "expected started event for aggregate, got nil")

		// pipeline is array of documents. first value of first element in array is the first stage document
		firstStage := started.Command.Lookup("pipeline").Array().Index(0).Value().Document()
		elems, _ := firstStage.Elements()
		assert.Equal(mt, 1, len(elems), "expected first stage document to have 1 element, got %v", len(elems))
		firstKey := elems[0].Key()
		want := "$changeStream"
		assert.Equal(mt, want, firstKey, "expected first stage to be %v, got %v", want, firstKey)
	})
	mt.Run("track resume token", func(mt *mtest.T) {
		// ChangeStream must continuously track the last seen resumeToken

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		generateEvents(mt, 1)
		assert.True(mt, cs.Next(context.Background()), "expected next to return true, got false")
		assert.NotNil(mt, cs.ResumeToken(), "expected resume token, got nil")
	})
	mt.RunOpts("resume token updated on empty batch", mtest.NewOptions().MinServerVersion("4.0.7"), func(mt *mtest.T) {
		// The resume token is updated when an empty batch is returned using the server's post batch resume token.

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		// cause an event to occur so the resume token is updated
		generateEvents(mt, 1)
		assert.True(mt, cs.Next(context.Background()), "expected next to return true, got false")
		firstToken := cs.ResumeToken()

		// cause an event on a different collection than the one being watched so the server's PBRT is updated
		diffColl := mt.CreateCollection(mtest.Collection{Name: "diffCollUpdatePbrt"}, false)
		_, err = diffColl.InsertOne(context.Background(), bson.D{{"x", 1}})
		assert.Nil(mt, err, "InsertOne error: %v", err)

		// verify that the resume token is updated using the PBRT from an empty batch
		mt.ClearEvents()
		assert.False(mt, cs.TryNext(context.Background()), "unexpected event document: %v", cs.Current)
		assert.Nil(mt, cs.Err(), "change stream error getting new batch: %v", cs.Err())
		newToken := cs.ResumeToken()
		assert.NotEqual(mt, newToken, firstToken, "resume token was not updated after an empty batch was returned")

		evt := mt.GetSucceededEvent()
		assert.Equal(mt, "getMore", evt.CommandName, "expected event for 'getMore', got '%v'", evt.CommandName)
		getMorePbrt := evt.Reply.Lookup("cursor", "postBatchResumeToken").Document()
		assert.Equal(mt, newToken, getMorePbrt, "expected resume token %v, got %v", getMorePbrt, newToken)
	})
	mt.Run("missing resume token", func(mt *mtest.T) {
		// ChangeStream will throw an exception if the server response is missing the resume token

		projectDoc := bson.D{
			{"$project", bson.D{
				{"_id", 0},
			}},
		}
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{projectDoc})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		generateEvents(mt, 2)
		assert.False(mt, cs.Next(context.Background()), "expected Next to return false, got true")
		assert.NotNil(mt, cs.Err(), "expected error, got nil")
	})
	mt.RunOpts("resume once", mtest.NewOptions().ClientType(mtest.Mock), func(mt *mtest.T) {
		// ChangeStream will automatically resume one time on a resumable error

		// aggregateRes: create change stream with ID 1 and a batch of size 1 so the resume token will be recorded
		// failureGetMoreRes: resumable error
		// killCursorsRes: success
		// resumedAggregateRes: create new change stream with ID 2 and a batch of size 1 so the resume token will be
		// updated
		ns := mt.Coll.Database().Name() + "." + mt.Coll.Name()
		aggregateRes := mtest.CreateCursorResponse(1, ns, mtest.FirstBatch, bson.D{
			{"_id", bson.D{{"first", "resume token"}}},
		})
		failureGetMoreRes := mtest.CreateCommandErrorResponse(mtest.CommandError{
			Code:    errorHostUnreachable,
			Name:    "foo",
			Message: "bar",
			Labels:  []string{resumableChangeStreamError},
		})
		killCursorsRes := mtest.CreateSuccessResponse()
		newResumeToken := bson.D{{"second", "resume token"}}
		resumedAggregateRes := mtest.CreateCursorResponse(2, ns, mtest.FirstBatch, bson.D{
			{"_id", newResumeToken},
		})
		mt.AddMockResponses(
			aggregateRes,
			failureGetMoreRes,
			killCursorsRes,
			resumedAggregateRes,
		)

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)
		// Consume the first document
		assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")

		// Clear existing events and expect a resume attempt to happen.
		mt.ClearEvents()
		assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")

		// Next should cause getMore, killCursors, and aggregate to run
		assert.NotNil(mt, mt.GetStartedEvent(), "expected getMore event, got nil")
		assert.NotNil(mt, mt.GetStartedEvent(), "expected killCursors event, got nil")
		aggEvent := mt.GetStartedEvent()
		assert.NotNil(mt, aggEvent, "expected aggregate event, got nil")
		assert.Equal(mt, "aggregate", aggEvent.CommandName, "expected command name 'aggregate', got '%v'", aggEvent.CommandName)

		// Assert that the change stream has updated it's ID and resume token.
		assert.Equal(mt, cs.ID(), int64(2), "expected change stream ID to be 2, got %d", cs.ID())
		newResumeTokenRaw, err := bson.Marshal(newResumeToken)
		assert.Nil(mt, err, "Marshal error: %v", err)
		comparisonErr := compareDocs(mt, newResumeTokenRaw, cs.ResumeToken())
		assert.Nil(mt, comparisonErr, "expected resume token %s, got %s", newResumeTokenRaw, cs.ResumeToken())
	})
	mt.RunOpts("no resume for aggregate errors", mtest.NewOptions().ClientType(mtest.Mock), func(mt *mtest.T) {
		// ChangeStream will not attempt to resume on any error encountered while executing an aggregate command

		// aggregate response: empty batch but valid cursor ID
		// getMore response: resumable error
		// killCursors response: success
		// resumed aggregate response: resumable error
		ns := mt.Coll.Database().Name() + "." + mt.Coll.Name()
		aggRes := mtest.CreateCursorResponse(1, ns, mtest.FirstBatch)
		getMoreRes := mtest.CreateCommandErrorResponse(mtest.CommandError{
			Code:    errorHostUnreachable,
			Name:    "foo",
			Message: "bar",
			Labels:  []string{resumableChangeStreamError},
		})
		killCursorsRes := mtest.CreateSuccessResponse()
		resumedAggRes := mtest.CreateCommandErrorResponse(mtest.CommandError{
			Code:    errorHostUnreachable,
			Name:    "foo",
			Message: "bar",
			Labels:  []string{resumableChangeStreamError},
		})
		mt.AddMockResponses(aggRes, getMoreRes, killCursorsRes, resumedAggRes)

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		assert.False(mt, cs.Next(context.Background()), "expected Next to return false, got true")
	})
	mt.RunOpts("server selection before resume", mtest.NewOptions().CreateClient(false), func(mt *mtest.T) {
		// ChangeStream will perform server selection before attempting to resume, using initial readPreference
		mt.Skip("skipping for lack of SDAM monitoring")
	})
	mt.Run("empty batch cursor not closed", func(mt *mtest.T) {
		// Ensure that a cursor returned from an aggregate command with a cursor id and an initial empty batch is not closed

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)
		assert.True(mt, cs.ID() > 0, "expected non-zero ID, got 0")
	})
	mt.RunOpts("ignore errors from killCursors", mtest.NewOptions().ClientType(mtest.Mock), func(mt *mtest.T) {
		// The killCursors command sent during the "Resume Process" must not be allowed to throw an exception.

		ns := mt.Coll.Database().Name() + "." + mt.Coll.Name()
		aggRes := mtest.CreateCursorResponse(1, ns, mtest.FirstBatch)
		getMoreRes := mtest.CreateCommandErrorResponse(mtest.CommandError{
			Code:    errorHostUnreachable,
			Name:    "foo",
			Message: "bar",
			Labels:  []string{"ResumableChangeStreamError"},
		})
		killCursorsRes := mtest.CreateCommandErrorResponse(mtest.CommandError{
			Code:    errorInterrupted,
			Name:    "foo",
			Message: "bar",
		})
		changeDoc := bson.D{{"_id", bson.D{{"x", 1}}}}
		resumedAggRes := mtest.CreateCursorResponse(1, ns, mtest.FirstBatch, changeDoc)
		mt.AddMockResponses(aggRes, getMoreRes, killCursorsRes, resumedAggRes)

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
		assert.Nil(mt, cs.Err(), "change stream error: %v", cs.Err())
	})

	startAtOpTimeOpts := mtest.NewOptions().MinServerVersion("4.0").MaxServerVersion("4.0.6")
	mt.RunOpts("include startAtOperationTime", startAtOpTimeOpts, func(mt *mtest.T) {
		// $changeStream stage for ChangeStream against a server >=4.0 and <4.0.7 that has not received any results yet
		// MUST include a startAtOperationTime option when resuming a changestream.

		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		generateEvents(mt, 1)
		// kill cursor to force resumable error
		killChangeStreamCursor(mt, cs)

		mt.ClearEvents()
		// change stream should resume once and get new change
		assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
		// Next should cause getMore, killCursors, and aggregate to run
		assert.NotNil(mt, mt.GetStartedEvent(), "expected getMore event, got nil")
		assert.NotNil(mt, mt.GetStartedEvent(), "expected killCursors event, got nil")
		aggEvent := mt.GetStartedEvent()
		assert.NotNil(mt, aggEvent, "expected aggregate event, got nil")
		assert.Equal(mt, "aggregate", aggEvent.CommandName, "expected command name 'aggregate', got '%v'", aggEvent.CommandName)

		// check for startAtOperationTime in pipeline
		csStage := aggEvent.Command.Lookup("pipeline").Array().Index(0).Value().Document() // $changeStream stage
		_, err = csStage.Lookup("$changeStream").Document().LookupErr("startAtOperationTime")
		assert.Nil(mt, err, "startAtOperationTime not included in aggregate command")
	})
	mt.RunOpts("decode does not panic", noClientOpts, func(mt *mtest.T) {
		testCases := []struct {
			name             string
			st               streamType
			minServerVersion string
		}{
			{"client", client, "4.0"},
			{"database", database, "4.0"},
			{"collection", collection, ""},
		}
		for _, tc := range testCases {
			tcOpts := mtest.NewOptions()
			if tc.minServerVersion != "" {
				tcOpts.MinServerVersion(tc.minServerVersion)
			}
			mt.RunOpts(tc.name, tcOpts, func(mt *mtest.T) {
				var cs *mongo.ChangeStream
				var err error
				switch tc.st {
				case client:
					cs, err = mt.Client.Watch(context.Background(), mongo.Pipeline{})
				case database:
					cs, err = mt.DB.Watch(context.Background(), mongo.Pipeline{})
				case collection:
					cs, err = mt.Coll.Watch(context.Background(), mongo.Pipeline{})
				}
				assert.Nil(mt, err, "Watch error: %v", err)
				defer closeStream(cs)

				generateEvents(mt, 1)
				assert.True(mt, cs.Next(context.Background()), "expected Next true, got false")
				var res bson.D
				err = cs.Decode(&res)
				assert.Nil(mt, err, "Decode error: %v", err)
				assert.True(mt, len(res) > 0, "expected non-empty document, got empty")
			})
		}
	})
	mt.Run("maxAwaitTimeMS", func(mt *mtest.T) {
		// maxAwaitTimeMS option should be sent as maxTimeMS on getMore

		opts := options.ChangeStream().SetMaxAwaitTime(100 * time.Millisecond)
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{}, opts)
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		_, err = mt.Coll.InsertOne(context.Background(), bson.D{{"x", 1}})
		assert.Nil(mt, err, "InsertOne error: %v", err)
		mt.ClearEvents()
		assert.True(mt, cs.Next(context.Background()), "expected Next true, got false")

		e := mt.GetStartedEvent()
		assert.NotNil(mt, e, "expected getMore event, got nil")
		_, err = e.Command.LookupErr("maxTimeMS")
		assert.Nil(mt, err, "field maxTimeMS not found in command %v", e.Command)
	})
	mt.RunOpts("resume token", noClientOpts, func(mt *mtest.T) {
		// Prose tests to make assertions on resume tokens for change streams that have not done a getMore yet
		mt.RunOpts("no getMore", noClientOpts, func(mt *mtest.T) {
			pbrtOpts := mtest.NewOptions().MinServerVersion(minPbrtVersion).CreateClient(false)
			mt.RunOpts("with PBRT support", pbrtOpts, func(mt *mtest.T) {
				testCases := []struct {
					name             string
					rt               resumeType
					minServerVersion string
				}{
					{"startAfter", startAfter, minStartAfterVersion},
					{"resumeAfter", resumeAfter, minPbrtVersion},
					{"neither", operationTime, minPbrtVersion},
				}

				for _, tc := range testCases {
					tcOpts := mtest.NewOptions().MinServerVersion(tc.minServerVersion)
					mt.RunOpts(tc.name, tcOpts, func(mt *mtest.T) {
						// create temp stream to get a resume token
						mt.ClearEvents()
						cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
						assert.Nil(mt, err, "Watch error: %v", err)

						// Initial resume token should equal the PBRT in the aggregate command
						pbrt, opTime := getAggregateResponseInfo(mt)
						compareResumeTokens(mt, cs, pbrt)

						numEvents := 5
						generateEvents(mt, numEvents)

						// Iterate over one event to get resume token
						assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
						token := cs.ResumeToken()
						closeStream(cs)

						var numExpectedEvents int
						var initialToken bson.Raw
						var opts *options.ChangeStreamOptions
						switch tc.rt {
						case startAfter:
							numExpectedEvents = numEvents - 1
							initialToken = token
							opts = options.ChangeStream().SetStartAfter(token)
						case resumeAfter:
							numExpectedEvents = numEvents - 1
							initialToken = token
							opts = options.ChangeStream().SetResumeAfter(token)
						case operationTime:
							numExpectedEvents = numEvents
							opts = options.ChangeStream().SetStartAtOperationTime(&opTime)
						}

						// clear slate and create new change stream
						mt.ClearEvents()
						cs, err = mt.Coll.Watch(context.Background(), mongo.Pipeline{}, opts)
						assert.Nil(mt, err, "Watch error: %v", err)
						defer closeStream(cs)

						aggPbrt, _ := getAggregateResponseInfo(mt)
						compareResumeTokens(mt, cs, initialToken)

						for i := 0; i < numExpectedEvents; i++ {
							assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
							// while we're not at the last doc in the batch, the resume token should be the _id of the
							// document
							if i != numExpectedEvents-1 {
								compareResumeTokens(mt, cs, cs.Current.Lookup("_id").Document())
							}
						}
						// at end of batch, the resume token should equal the PBRT of the aggregate
						compareResumeTokens(mt, cs, aggPbrt)
					})
				}
			})

			noPbrtOpts := mtest.NewOptions().MaxServerVersion("4.0.6")
			mt.RunOpts("without PBRT support", noPbrtOpts, func(mt *mtest.T) {
				collName := mt.Coll.Name()
				dbName := mt.Coll.Database().Name()
				cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
				assert.Nil(mt, err, "Watch error: %v", err)
				defer closeStream(cs)

				compareResumeTokens(mt, cs, nil) // should be no resume token because no PBRT
				numEvents := 5
				generateEvents(mt, numEvents)
				// iterate once to get a resume token
				assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
				token := cs.ResumeToken()
				assert.NotNil(mt, token, "expected resume token, got nil")

				testCases := []struct {
					name            string
					opts            *options.ChangeStreamOptions
					iterateStream   bool // whether or not resulting change stream should be iterated
					initialToken    bson.Raw
					numDocsExpected int
				}{
					{"resumeAfter", options.ChangeStream().SetResumeAfter(token), true, token, numEvents - 1},
					{"no options", nil, false, nil, 0},
				}
				for _, tc := range testCases {
					mt.Run(tc.name, func(mt *mtest.T) {
						coll := mt.Client.Database(dbName).Collection(collName)
						cs, err := coll.Watch(context.Background(), mongo.Pipeline{}, tc.opts)
						assert.Nil(mt, err, "Watch error: %v", err)
						defer closeStream(cs)

						compareResumeTokens(mt, cs, tc.initialToken)
						if !tc.iterateStream {
							return
						}

						for i := 0; i < tc.numDocsExpected; i++ {
							assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
							// current resume token should always equal _id of current document
							compareResumeTokens(mt, cs, cs.Current.Lookup("_id").Document())
						}
					})
				}
			})
		})
	})
	mt.RunOpts("try next", noClientOpts, func(mt *mtest.T) {
		mt.Run("existing non-empty batch", func(mt *mtest.T) {
			// If there's already documents in the current batch, TryNext should return true without doing a getMore

			cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
			assert.Nil(mt, err, "Watch error: %v", err)
			defer closeStream(cs)
			generateEvents(mt, 5)
			// call Next to make sure a batch is retrieved
			assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false")
			tryNextExistingBatchTest(mt, cs)
		})
		mt.Run("one getMore sent", func(mt *mtest.T) {
			// If the current batch is empty, TryNext should send one getMore and return.

			cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
			assert.Nil(mt, err, "Watch error: %v", err)
			defer closeStream(cs)

			mt.ClearEvents()
			// first call to TryNext should return false because first batch was empty so batch cursor returns false
			// without doing a getMore
			// next call to TryNext should attempt a getMore
			for i := 0; i < 2; i++ {
				assert.False(mt, cs.TryNext(context.Background()), "TryNext returned true on iteration %v", i)
			}
			verifyOneGetmoreSent(mt)
		})
		mt.RunOpts("getMore error", mtest.NewOptions().ClientType(mtest.Mock), func(mt *mtest.T) {
			// If the getMore attempt errors with a non-resumable error, TryNext returns false

			aggRes := mtest.CreateCursorResponse(50, "foo.bar", mtest.FirstBatch)
			mt.AddMockResponses(aggRes)
			cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
			assert.Nil(mt, err, "Watch error: %v", err)
			defer closeStream(cs)
			tryNextGetmoreError(mt, cs)
		})
	})

	customDeploymentOpts := mtest.NewOptions().
		Topologies(mtest.ReplicaSet). // Avoid complexity of sharded fail points.
		MinServerVersion("4.0").      // 4.0 is needed to use replica set fail points.
		CreateClient(false)
	mt.RunOpts("custom deployment", customDeploymentOpts, func(mt *mtest.T) {
		// Tests for the changeStreamDeployment type. These are written as integration tests for ChangeStream rather
		// than unit/integration tests for changeStreamDeployment to ensure that the deployment is correctly wired
		// by ChangeStream when executing an aggregate.

		mt.Run("errors are processed for SDAM on initial aggregate", func(mt *mtest.T) {
			tpm := eventtest.NewTestPoolMonitor()
			mt.ResetClient(options.Client().
				SetPoolMonitor(tpm.PoolMonitor).
				SetWriteConcern(mtest.MajorityWc).
				SetReadConcern(mtest.MajorityRc).
				SetRetryReads(false))

			mt.SetFailPoint(mtest.FailPoint{
				ConfigureFailPoint: "failCommand",
				Mode: mtest.FailPointMode{
					Times: 1,
				},
				Data: mtest.FailPointData{
					FailCommands:    []string{"aggregate"},
					CloseConnection: true,
				},
			})

			_, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
			assert.NotNil(mt, err, "expected Watch error, got nil")
			assert.True(mt, tpm.IsPoolCleared(), "expected pool to be cleared after non-timeout network error but was not")
		})
		mt.Run("errors are processed for SDAM on getMore", func(mt *mtest.T) {
			tpm := eventtest.NewTestPoolMonitor()
			mt.ResetClient(options.Client().
				SetPoolMonitor(tpm.PoolMonitor).
				SetWriteConcern(mtest.MajorityWc).
				SetReadConcern(mtest.MajorityRc).
				SetRetryReads(false))

			mt.SetFailPoint(mtest.FailPoint{
				ConfigureFailPoint: "failCommand",
				Mode: mtest.FailPointMode{
					Times: 1,
				},
				Data: mtest.FailPointData{
					FailCommands:    []string{"getMore"},
					CloseConnection: true,
				},
			})

			cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
			assert.Nil(mt, err, "Watch error: %v", err)
			defer closeStream(cs)

			_, err = mt.Coll.InsertOne(context.Background(), bson.D{{"x", 1}})
			assert.Nil(mt, err, "InsertOne error: %v", err)

			assert.True(mt, cs.Next(context.Background()), "expected Next to return true, got false (iteration error %v)",
				cs.Err())
			assert.True(mt, tpm.IsPoolCleared(), "expected pool to be cleared after non-timeout network error but was not")
		})
		mt.Run("errors are processed for SDAM on retried aggregate", func(mt *mtest.T) {
			tpm := eventtest.NewTestPoolMonitor()
			mt.ResetClient(options.Client().
				SetPoolMonitor(tpm.PoolMonitor).
				SetRetryReads(true))

			mt.SetFailPoint(mtest.FailPoint{
				ConfigureFailPoint: "failCommand",
				Mode: mtest.FailPointMode{
					Times: 2,
				},
				Data: mtest.FailPointData{
					FailCommands:    []string{"aggregate"},
					CloseConnection: true,
				},
			})

			_, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
			assert.NotNil(mt, err, "expected Watch error, got nil")

			clearedEvents := tpm.Events(func(evt *event.PoolEvent) bool {
				return evt.Type == event.PoolCleared
			})
			assert.Equal(mt, 2, len(clearedEvents), "expected two PoolCleared events, got %d", len(clearedEvents))
		})
	})
	// Setting min server version as 4.0 since v3.6 does not send a "dropEvent"
	mt.RunOpts("call to cursor.Next after cursor closed", mtest.NewOptions().MinServerVersion("4.0"), func(mt *mtest.T) {
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		// Generate insert events
		generateEvents(mt, 5)
		// Call Coll.Drop to generate drop and invalidate event
		err = mt.Coll.Drop(context.Background())
		assert.Nil(mt, err, "Drop error: %v", err)

		// Test that all events were successful
		for i := 0; i < 7; i++ {
			assert.True(mt, cs.Next(context.Background()), "Next returned false at index %d; iteration error: %v", i, cs.Err())
		}

		operationType := cs.Current.Lookup("operationType").StringValue()
		assert.Equal(mt, operationType, "invalidate", "expected invalidate event but returned %q event", operationType)
		// next call to cs.Next should return False since cursor is closed
		assert.False(mt, cs.Next(context.Background()), "expected to return false, but returned true")
	})
	mt.Run("getMore commands are monitored", func(mt *mtest.T) {
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		_, err = mt.Coll.InsertOne(context.Background(), bson.M{"x": 1})
		assert.Nil(mt, err, "InsertOne error: %v", err)

		mt.ClearEvents()
		assert.True(mt, cs.Next(context.Background()), "Next returned false with error %v", cs.Err())
		evt := mt.GetStartedEvent()
		assert.Equal(mt, "getMore", evt.CommandName, "expected command 'getMore', got %q", evt.CommandName)
	})
	mt.Run("killCursors commands are monitored", func(mt *mtest.T) {
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		mt.ClearEvents()
		err = cs.Close(context.Background())
		assert.Nil(mt, err, "Close error: %v", err)
		evt := mt.GetStartedEvent()
		assert.Equal(mt, "killCursors", evt.CommandName, "expected command 'killCursors', got %q", evt.CommandName)
	})
	mt.Run("Custom", func(mt *mtest.T) {
		// Custom options should be a BSON map of option names to Marshalable option values.
		// We use "allowDiskUse" as an example.
		customOpts := bson.M{"allowDiskUse": true}
		opts := options.ChangeStream().SetCustom(customOpts)

		// Create change stream with custom options set.
		mt.ClearEvents()
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{}, opts)
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		// Assert that custom option is passed to the initial aggregate.
		evt := mt.GetStartedEvent()
		assert.Equal(mt, "aggregate", evt.CommandName, "expected command 'aggregate' got, %q", evt.CommandName)

		aduVal, err := evt.Command.LookupErr("allowDiskUse")
		assert.Nil(mt, err, "expected field 'allowDiskUse' in started command not found")
		adu, ok := aduVal.BooleanOK()
		assert.True(mt, ok, "expected field 'allowDiskUse' to be boolean, got %v", aduVal.Type.String())
		assert.True(mt, adu, "expected field 'allowDiskUse' to be true, got false")
	})
	mt.RunOpts("CustomPipeline", mtest.NewOptions().MinServerVersion("4.0"), func(mt *mtest.T) {
		// Custom pipeline options should be a BSON map of option names to Marshalable option values.
		// We use "allChangesForCluster" as an example.
		customPipelineOpts := bson.M{"allChangesForCluster": false}
		opts := options.ChangeStream().SetCustomPipeline(customPipelineOpts)

		// Create change stream with custom pipeline options set.
		mt.ClearEvents()
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{}, opts)
		assert.Nil(mt, err, "Watch error: %v", err)
		defer closeStream(cs)

		// Assert that custom pipeline option is included in the $changeStream stage.
		evt := mt.GetStartedEvent()
		assert.Equal(mt, "aggregate", evt.CommandName, "expected command 'aggregate' got, %q", evt.CommandName)

		acfcVal, err := evt.Command.LookupErr("pipeline", "0", "$changeStream", "allChangesForCluster")
		assert.Nil(mt, err, "expected field 'allChangesForCluster' in $changeStream stage not found")
		acfc, ok := acfcVal.BooleanOK()
		assert.True(mt, ok, "expected field 'allChangesForCluster' to be boolean, got %v", acfcVal.Type.String())
		assert.False(mt, acfc, "expected field 'allChangesForCluster' to be false, got %v", acfc)
	})

	withBSONOpts := mtest.NewOptions().ClientOptions(
		options.Client().SetBSONOptions(&options.BSONOptions{
			UseJSONStructTags: true,
		}))
	mt.RunOpts("with BSONOptions", withBSONOpts, func(mt *mtest.T) {
		cs, err := mt.Coll.Watch(context.Background(), mongo.Pipeline{})
		require.NoError(mt, err, "Watch error")
		defer closeStream(cs)

		type myDocument struct {
			A string `json:"x"`
		}

		var wg sync.WaitGroup
		wg.Add(1)
		go func() {
			defer wg.Done()
			_, err := mt.Coll.InsertOne(context.Background(), myDocument{A: "foo"})
			require.NoError(mt, err, "InsertOne error")
		}()

		cs.Next(context.Background())

		var got struct {
			FullDocument myDocument `bson:"fullDocument"`
		}
		err = cs.Decode(&got)
		require.NoError(mt, err, "Decode error")

		want := myDocument{
			A: "foo",
		}
		assert.Equal(mt, want, got.FullDocument, "expected and actual Decode results are different")

		wg.Wait()
	})

	splitLargeChangesCollOpts := options.
		CreateCollection().
		SetChangeStreamPreAndPostImages(bson.M{"enabled": true})

	splitLargeChangesOpts := mtOpts.
		MinServerVersion("6.0.9").
		CreateClient(true).
		CollectionCreateOptions(splitLargeChangesCollOpts)

	mt.RunOpts("split large changes", splitLargeChangesOpts, func(mt *mtest.T) {
		type idValue struct {
			ID    int32  `bson:"_id"`
			Value string `bson:"value"`
		}

		doc := idValue{
			ID:    1,
			Value: "q" + strings.Repeat("q", 10*1024*1024),
		}

		// Insert the document
		_, err := mt.Coll.InsertOne(context.Background(), doc)
		require.NoError(t, err, "failed to insert idValue")

		// Watch for change events
		pipeline := mongo.Pipeline{
			{{"$changeStreamSplitLargeEvent", bson.D{}}},
		}

		opts := options.ChangeStream().SetFullDocument(options.Required)

		cs, err := mt.Coll.Watch(context.Background(), pipeline, opts)
		require.NoError(t, err, "failed to watch collection")

		defer closeStream(cs)

		var wg sync.WaitGroup
		wg.Add(1)

		go func() {
			defer wg.Done()

			filter := bson.D{{"_id", int32(1)}}
			update := bson.D{{"$set", bson.D{{"value", "z" + strings.Repeat("q", 10*1024*1024)}}}}

			_, err := mt.Coll.UpdateOne(context.Background(), filter, update)
			require.NoError(mt, err, "failed to update idValue")
		}()

		nextCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
		t.Cleanup(cancel)

		type splitEvent struct {
			Fragment int32 `bson:"fragment"`
			Of       int32 `bson:"of"`
		}

		got := struct {
			SplitEvent splitEvent `bson:"splitEvent"`
		}{}

		cs.Next(nextCtx)

		err = cs.Decode(&got)
		require.NoError(mt, err, "failed to decode first iteration")

		want := splitEvent{
			Fragment: 1,
			Of:       2,
		}

		assert.Equal(mt, want, got.SplitEvent, "expected and actual Decode results are different")

		cs.Next(nextCtx)

		err = cs.Decode(&got)
		require.NoError(mt, err, "failed to decoded second iteration")

		want = splitEvent{
			Fragment: 2,
			Of:       2,
		}

		assert.Equal(mt, want, got.SplitEvent, "expected and actual decode results are different")

		wg.Wait()
	})
}

func closeStream(cs *mongo.ChangeStream) {
	_ = cs.Close(context.Background())
}

func generateEvents(mt *mtest.T, numEvents int) {
	mt.Helper()

	for i := 0; i < numEvents; i++ {
		doc := bson.D{{"x", i}}
		_, err := mt.Coll.InsertOne(context.Background(), doc)
		assert.Nil(mt, err, "InsertOne error on document %v: %v", doc, err)
	}
}

func killChangeStreamCursor(mt *mtest.T, cs *mongo.ChangeStream) {
	mt.Helper()

	db := mt.Coll.Database().Client().Database("admin")
	err := db.RunCommand(context.Background(), bson.D{
		{"killCursors", mt.Coll.Name()},
		{"cursors", bson.A{cs.ID()}},
	}).Err()
	assert.Nil(mt, err, "killCursors error: %v", err)
}

// returns pbrt, operationTime from aggregate command response
func getAggregateResponseInfo(mt *mtest.T) (bson.Raw, primitive.Timestamp) {
	mt.Helper()

	succeeded := mt.GetSucceededEvent()
	assert.NotNil(mt, succeeded, "expected success event for aggregate, got nil")
	assert.Equal(mt, "aggregate", succeeded.CommandName, "expected command name 'aggregate', got '%v'", succeeded.CommandName)

	pbrt := succeeded.Reply.Lookup("cursor", "postBatchResumeToken").Document()
	optimeT, optimeI := succeeded.Reply.Lookup("operationTime").Timestamp()
	return pbrt, primitive.Timestamp{T: optimeT, I: optimeI}
}

func compareResumeTokens(mt *mtest.T, cs *mongo.ChangeStream, expected bson.Raw) {
	mt.Helper()
	assert.Equal(mt, expected, cs.ResumeToken(), "expected resume token %v, got %v", expected, cs.ResumeToken())
}

Youez - 2016 - github.com/yon3zu
LinuXploit