################################################################################
# This test validates the functioning of the version handshake algorithm on
# group replication.
# The test makes the group go through several changes involving different member
# versions validating the expected outcome on each case.
# The test script is:
# *) The test requires five servers: S1, S2, S3, S4
#
# Server  Step                                      Version (to base)    Outcome
#-------------------------------------------------------------------------------
#  (S1)   join member with a higher patch version*  (patch version + 1)    OK
#  (S2)   join member with a higher minor version   (minor version + 1)    OK
#  (S3)   join member with the base version         (base version)       Failure
#  (S3)   member leaves
#  (S3)   join member with a higher major version   (major version +1)     OK
#  (S4)   join member with a higher minor version   (minor version + 1)    OK
#  (S1)   member leaves
#  (S1)   join member with the base version         (base version)       Failure
#
# *) The group start happens with Server 1 joining
#
# The base version is version of the plugin associated with this test:
#  Version= MAJOR.MINOR.PATCH
#
################################################################################

--source include/not_valgrind.inc
--source include/big_test.inc
--source include/have_debug.inc
--let $group_replication_group_name= 8a1da670-05fa-11e5-b939-0800200c9a66
--source include/have_group_replication_plugin.inc
--let $rpl_skip_group_replication_start= 1
--let $rpl_server_count= 4
--source include/group_replication.inc

--echo #
--echo # Check the version of member 1 is fully visible in the plugin table
--echo #

--let $assert_text= The plugin major and minor versions are visible in the version column
--let $assert_cond= [SELECT COUNT(*) FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME= "group_replication" and PLUGIN_VERSION= "1.1" ] = 1;
--source include/assert.inc

--let $assert_text= The plugin total version can be seen in the description column
--let $assert_cond= [SELECT COUNT(*) FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME= "group_replication" and PLUGIN_DESCRIPTION= "Group Replication (1.1.0)" ] = 1;
--source include/assert.inc

--echo #
--echo # Setup a new member with version a higher patch version
--echo # Version= Base version + 1 patch version
--echo #

--connection server1
--echo server1

SET @debug_saved_s1= @@GLOBAL.DEBUG;
SET @@GLOBAL.DEBUG= '+d,group_replication_compatibility_higher_patch_version';

--source include/start_and_bootstrap_group_replication.inc

# Add some data for recovery

CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);


--echo #
--echo # Try to add a new member with a higher minor version
--echo # Version = Base version + 1 minor version
--echo # The member will join the group
--echo #

--connection server2
--echo server2

SET @debug_saved_s2= @@GLOBAL.DEBUG;
# Cause the member to broadcast and compare himself using a higher version
SET @@GLOBAL.DEBUG= '+d,group_replication_compatibility_higher_minor_version';

SET session sql_log_bin=0;
call mtr.add_suppression("Member version is read compatible with the group.");
SET session sql_log_bin=1;

--source include/start_group_replication.inc

# Check the data is there

--let $assert_text= On the recovered member, the table should contain 1 elements
--let $assert_cond= [SELECT COUNT(*) FROM t1] = 1;
--source include/assert.inc

--echo #
--echo # Try to add a new member with a base version.
--echo # Version = Base version
--echo # It will fail since group lowest version is (patch + 1)
--echo # Try to add server 3 again with higher major version.
--echo # Version= Base version + 1 major version
--echo # It will succeed and join group in read only mode.
--echo #

--connection server3
--echo server3

SET session sql_log_bin=0;
call mtr.add_suppression("Member version is incompatible with the group");
call mtr.add_suppression("Member version is read compatible with the group.");
SET session sql_log_bin=1;

--eval SET GLOBAL group_replication_group_name= "$group_replication_group_name"
--error ER_GROUP_REPLICATION_CONFIGURATION
START GROUP_REPLICATION;

# Cause the member to broadcast and compare himself using a higher version
SET @@GLOBAL.DEBUG= '+d,group_replication_compatibility_higher_major_version';

--source include/start_group_replication.inc

# Check the data is there

--let $assert_text= On the recovered member, the table should contain 1 elements
--let $assert_cond= [SELECT COUNT(*) FROM t1] = 1;
--source include/assert.inc

--echo #
--echo # Try to add a new member with a major version equal to the base version,
--echo # but a higher minor version.
--echo # Version = Base version + 1 minor version
--echo #

--connection server4
--echo server4

SET @debug_saved_s4= @@GLOBAL.DEBUG;

SET session sql_log_bin=0;
call mtr.add_suppression("Member version is read compatible with the group.");
SET session sql_log_bin=1;

# Cause the member to broadcast and compare himself using a high version
SET @@GLOBAL.DEBUG= '+d,group_replication_compatibility_higher_minor_version';
SET GLOBAL group_replication_group_name= "8a1da670-05fa-11e5-b939-0800200c9a66";

# Before < 8.0.16 this join used to fail because higher major version member is present i.e. S3 server
# Post 8.0.16 this will succeed, since comparison is done with only lowest version i.e. S1 in this scenario
# S4 is compatible since its greater then patch version present in group i.e. S1 server
--source include/start_group_replication.inc

# Check the data is there

--let $assert_text= On the recovered member, the table should contain 1 elements
--let $assert_cond= [SELECT COUNT(*) FROM t1] = 1;
--source include/assert.inc

--echo #
--echo # Stop GR on server 1 and start server 1 with base version.
--echo # Version = Base version
--echo # It will fail since group lowest version is (minor + 1)
--echo #

--connection server1
--echo server1

# DROP table now, else we will have to start all servers for cleanup
DROP TABLE t1;
--source include/rpl_sync.inc

--source include/stop_group_replication.inc

SET session sql_log_bin=0;
call mtr.add_suppression("Member version is incompatible with the group");
SET session sql_log_bin=1;

SET @@GLOBAL.DEBUG= @debug_save_s1;
--eval SET GLOBAL group_replication_group_name= "$group_replication_group_name"
--error ER_GROUP_REPLICATION_CONFIGURATION
START GROUP_REPLICATION;

--echo #
--echo # Clean up
--echo #

--connection server2
--echo server2

SET @@GLOBAL.DEBUG= @debug_save_s2;
--source include/stop_group_replication.inc

--connection server3
--echo server3

SET @@GLOBAL.DEBUG= @debug_save_s3;
--source include/stop_group_replication.inc

--connection server4
--echo server4

SET @@GLOBAL.DEBUG= @debug_save_s4;
--source include/stop_group_replication.inc


--source include/group_replication_end.inc