1. add --plugin-dir and --default-auth to mysqltest.

2. dialog plugin now always returns mysql->password if non-empty and the first question is of password type
3. split get_tty_password into get_tty_password_buff and strdup.
4. dialog plugin now uses get_tty_password by default
5. dialog.test
6. moved small tests of individual plugins into a dedicated suite

mysql-test/suite/plugins/t/dialog.test

@@ -0,0 +1,51 @@
+#
+# test for the client "dialog" plugin
+#
+
+--source include/not_embedded.inc
+
+if (!$DIALOG_SO) {
+  skip No dialog auth plugin;
+}
+
+--replace_result .dll .so
+eval install plugin three_attempts soname '$DIALOG_SO';
+create user test_dialog identified via three_attempts using 'SECRET';
+
+let $plugindir=`SELECT @@global.plugin_dir`;
+
+--write_file $MYSQLTEST_VARDIR/tmp/dialog_good.txt
+foo
+1234
+SECRET
+select user(), current_user();
+EOF
+
+--write_file $MYSQLTEST_VARDIR/tmp/dialog_bad.txt
+foo
+1234
+wrong
+SECRET
+EOF
+
+--echo #
+--echo # -pSECRET is picked up, no questions asked.
+--echo #
+--exec echo "select user(), current_user();"|$MYSQL_TEST -u test_dialog -pSECRET --plugin-dir=$plugindir
+
+--echo #
+--echo # without -p. up to three questions are asked on the stdin.
+--echo # athentication is successful, the correct pasword is on the third line
+--echo #
+--exec $MYSQL_TEST -u test_dialog --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/dialog_good.txt
+
+--echo #
+--echo # athentication is unsuccessful, first three lines are all wrong
+--echo #
+--error 1
+--exec $MYSQL_TEST -u test_dialog --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/dialog_bad.txt
+
+--remove_file $MYSQLTEST_VARDIR/tmp/dialog_good.txt
+--remove_file $MYSQLTEST_VARDIR/tmp/dialog_bad.txt
+drop user test_dialog;
+uninstall plugin three_attempts;

mysql-test/suite/plugins/t/feedback_plugin_install.opt

@@ -0,0 +1 @@
+--loose-feedback

mysql-test/suite/plugins/t/feedback_plugin_install.test

@@ -0,0 +1,15 @@
+--source include/not_embedded.inc
+
+if (`select length('$FEEDBACK_SO') = 0`) {
+  skip No feedback plugin;
+}
+
+--replace_regex /\.dll/.so/
+eval install plugin feedback soname '$FEEDBACK_SO';
+select plugin_status from information_schema.plugins where plugin_name='feedback';
+--replace_result https http
+--sorted_result
+select * from information_schema.feedback where variable_name like 'feed%'
+       and variable_name not like  '%_uid';
+uninstall plugin feedback;
+

mysql-test/suite/plugins/t/feedback_plugin_load.opt

@@ -0,0 +1,2 @@
+--loose-feedback
+--plugin-load=$FEEDBACK_SO

mysql-test/suite/plugins/t/feedback_plugin_load.test

@@ -0,0 +1,10 @@
+if (`select count(*) = 0 from information_schema.plugins where plugin_name = 'feedback' and plugin_status='active'`)
+{
+  --skip Feedback plugin is not active
+}
+
+select plugin_status from information_schema.plugins where plugin_name='feedback';
+--replace_result https http
+--sorted_result
+select * from information_schema.feedback where variable_name like 'feed%'
+       and variable_name not like  '%_uid';

mysql-test/suite/plugins/t/feedback_plugin_send.test

@@ -0,0 +1,32 @@
+source feedback_plugin_load.test;
+
+if (!$MTR_FEEDBACK_PLUGIN) {
+  skip MTR_FEEDBACK_PLUGIN is not set;
+}
+
+#
+# Yep. The plugin waits 5 minutes before sending anything,
+# and there's no way to force it to send anything sooner.
+# Let's wait, and hope that mtr is started with --parallel and
+# is doing some work in other workers.
+#
+sleep 310;
+source include/restart_mysqld.inc;
+
+replace_result https http;
+perl;
+  $log_error= $ENV{'MYSQLTEST_VARDIR'} . '/log/mysqld.1.err';
+  open(LOG, '<', $log_error) or die "open(< $log_error): $!";
+
+  # Get the first few rows (as there may be different number rows in the log)
+  $i= 0;
+  while ($_=<LOG>)
+  {
+    if (/feedback plugin:.*/)
+    {
+      print "$&\n";
+      break if ($i++ >= 3);
+    }
+  }
+  close LOG;
+EOF

mysql-test/suite/plugins/t/fulltext_plugin.test

@@ -0,0 +1,11 @@
+--source include/have_simple_parser.inc
+
+#
+# BUG#39746 - Debug flag breaks struct definition (server crash)
+#
+--replace_result .dll .so
+eval INSTALL PLUGIN simple_parser SONAME '$MYPLUGLIB_SO';
+CREATE TABLE t1(a TEXT, b TEXT, FULLTEXT(a) WITH PARSER simple_parser);
+ALTER TABLE t1 ADD FULLTEXT(b) WITH PARSER simple_parser;
+DROP TABLE t1;
+UNINSTALL PLUGIN simple_parser;