WL#3949. Added an option for support "combinations" of mysqld arguments for a suite

mysql-test/lib/mtr_cases.pl:
  updated mtr_cases.pl
mysql-test/mysql-test-run.pl:
  updated mtr

mysql-test/lib/mtr_cases.pl

@@ -214,17 +214,44 @@ sub collect_one_suite($$)
 
   mtr_verbose("Collecting: $suite");
 
+  my $combination_file=  "combinations";
+  my $combinations = [];
+
   my $suitedir= "$::glob_mysql_test_dir"; # Default
+  my $combination_file= "$::glob_mysql_test_dir/$combination_file";
   if ( $suite ne "main" )
   {
     $suitedir= mtr_path_exists("$suitedir/suite/$suite",
 			       "$suitedir/$suite");
     mtr_verbose("suitedir: $suitedir");
+    $combination_file= "$suitedir/$combination_file";
   }
 
   my $testdir= "$suitedir/t";
   my $resdir=  "$suitedir/r";
 
+  if (!@::opt_combination) 
+  {
+    # Read combinations file
+    if ( open(COMB,$combination_file) )
+    {
+      while (<COMB>)
+      {
+        chomp;
+        s/\ +/ /g;
+        push (@$combinations, $_) unless ($_ eq '');
+      }
+      close COMB;
+    }
+  }
+  else
+  {
+    # take the combination from command-line
+    @$combinations = @::opt_combination;
+  }
+  # Remember last element position
+  my $begin_index = $#{@$cases} + 1;
+
   # ----------------------------------------------------------------------
   # Build a hash of disabled testcases for this suite
   # ----------------------------------------------------------------------
@@ -335,6 +362,78 @@ sub collect_one_suite($$)
     closedir TESTDIR;
   }
 
+  # ----------------------------------------------------------------------
+  # Proccess combinations only if new tests were added
+  # ----------------------------------------------------------------------
+  if ($combinations && $begin_index <= $#{@$cases}) 
+  { 
+    my $end_index = $#{@$cases};
+    my $is_copy;
+    # Keep original master/slave options
+    my @orig_opts;
+    for (my $idx = $begin_index; $idx <= $end_index; $idx++) 
+    {
+      foreach my $param (('master_opt','slave_opt','slave_mi')) 
+      {
+        @{$orig_opts[$idx]{$param}} = @{$cases->[$idx]->{$param}};        
+      }
+    }
+    my $comb_index = 1;
+    # Copy original test cases 
+    foreach my $comb_set (@$combinations)
+    {  
+      for (my $idx = $begin_index; $idx <= $end_index; $idx++) 
+      {
+        my $test = $cases->[$idx];
+        my $copied_test = {};
+        foreach my $param (keys %{$test}) 
+        {
+          # Scalar. Copy as is.
+          $copied_test->{$param} = $test->{$param};
+          # Array. Copy reference instead itself
+          if ($param =~ /(master_opt|slave_opt|slave_mi)/) 
+          {
+            my $new_arr = [];
+            @$new_arr = @{$orig_opts[$idx]{$param}};
+            $copied_test->{$param} = $new_arr;
+          }
+          elsif ($param =~ /(comment|combinations)/) 
+          {
+            $copied_test->{$param} = '';
+          }
+        }
+        if ($is_copy) 
+        {
+          push(@$cases, $copied_test);
+          $test = $cases->[$#{@$cases}];
+        }
+        foreach my $comb_opt (split(/ /,$comb_set)) 
+        {
+          push(@{$test->{'master_opt'}},$comb_opt);
+          push(@{$test->{'slave_opt'}},$comb_opt);
+          # Enable rpl if added option is --binlog-format and test case supports that
+          if ($comb_opt =~ /^--binlog-format=.+$/) 
+          {
+            my @opt_pairs = split(/=/, $comb_opt);
+            if ($test->{'binlog_format'} =~ /^$opt_pairs[1]$/ || $test->{'binlog_format'} eq '') 
+            {
+              $test->{'skip'} = 0;
+              $test->{'comment'} = '';
+            }
+            else
+            {
+              $test->{'skip'} = 1;
+              $test->{'comment'} = "Requiring binlog format '$test->{'binlog_format'}'";;
+            } 
+          }
+        }
+        $test->{'combination'} = $comb_set;
+      } 
+      $is_copy = 1;
+      $comb_index++;
+    }    
+  }
+
   return $cases;
 }
 

mysql-test/mysql-test-run.pl

@@ -164,6 +164,8 @@ our $opt_bench= 0;
 our $opt_small_bench= 0;
 our $opt_big_test= 0;
 
+our @opt_combination;
+
 our @opt_extra_mysqld_opt;
 
 our $opt_compress;
@@ -529,6 +531,7 @@ sub command_line_setup () {
              'skip-im'                  => \$opt_skip_im,
              'skip-test=s'              => \$opt_skip_test,
              'big-test'                 => \$opt_big_test,
+             'combination=s'            => \@opt_combination,
 
              # Specify ports
              'master_port=i'            => \$opt_master_myport,
@@ -5134,6 +5137,8 @@ Options to control what test suites or cases to run
   skip-im               Don't start IM, and skip the IM test cases
   big-test              Set the environment variable BIG_TEST, which can be
                         checked from test cases.
+  combination="ARG1 .. ARG2" Specify a set of "mysqld" arguments for one 
+                        combination. 
 
 Options that specify ports