From: Michael G. Schwern <schwern@pobox.com>
Date: Sat, 11 Jul 2009 07:34:31 +0000 (-0700)
Subject: Clean up t/op/sort.t to constrain tests which use a particular package.
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=5823dc9faecf0e625122fce2c34373fc2bfbbd96;p=p5sagit%2Fp5-mst-13.2.git

Clean up t/op/sort.t to constrain tests which use a particular package.

Also make use of is() instead of a home rolled conflicting Test.pm style ok().
---

diff --git a/t/op/sort.t b/t/op/sort.t
index 4473c32..616761a 100644
--- a/t/op/sort.t
+++ b/t/op/sort.t
@@ -2,7 +2,8 @@
 
 BEGIN {
     chdir 't' if -d 't';
-    @INC = qw(. ../lib); require 'test.pl';
+    @INC = qw(. ../lib);
+    require 'test.pl';
 }
 use warnings;
 plan( tests => 144 );
@@ -260,48 +261,43 @@ $x = join('', sort { $a <=> $b } 3, 1, 2);
 cmp_ok($x,'eq','123',q(optimized-away comparison block doesn't take any other arguments away with it));
 
 # test sorting in non-main package
-package Foo;
-@a = ( 5, 19, 1996, 255, 90 );
-@b = sort { $b <=> $a } @a;
-main::cmp_ok("@b",'eq','1996 255 90 19 5','not in main:: 1');
-
-
-@b = sort main::Backwards_stacked @a;
-main::cmp_ok("@b",'eq','90 5 255 1996 19','not in main:: 2');
-
-
-# check if context for sort arguments is handled right
-
-
-sub test_if_list {
-    my $gimme = wantarray;
-    main::is($gimme,1,'wantarray 1');
-
-
-}
-my $m = sub { $a <=> $b };
-
-sub cxt_one { sort $m test_if_list() }
-cxt_one();
-sub cxt_two { sort { $a <=> $b } test_if_list() }
-cxt_two();
-sub cxt_three { sort &test_if_list() }
-cxt_three();
+{
+    package Foo;
+    @a = ( 5, 19, 1996, 255, 90 );
+    @b = sort { $b <=> $a } @a;
+    ::cmp_ok("@b",'eq','1996 255 90 19 5','not in main:: 1');
 
-sub test_if_scalar {
-    my $gimme = wantarray;
-    main::is(!($gimme or !defined($gimme)),1,'wantarray 2');
+    @b = sort ::Backwards_stacked @a;
+    ::cmp_ok("@b",'eq','90 5 255 1996 19','not in main:: 2');
 
+    # check if context for sort arguments is handled right
+    sub test_if_list {
+        my $gimme = wantarray;
+        ::is($gimme,1,'wantarray 1');
+    }
+    my $m = sub { $a <=> $b };
+
+    sub cxt_one { sort $m test_if_list() }
+    cxt_one();
+    sub cxt_two { sort { $a <=> $b } test_if_list() }
+    cxt_two();
+    sub cxt_three { sort &test_if_list() }
+    cxt_three();
+
+    sub test_if_scalar {
+        my $gimme = wantarray;
+        ::is(!($gimme or !defined($gimme)),1,'wantarray 2');
+    }
 
+    $m = \&test_if_scalar;
+    sub cxt_four { sort $m 1,2 }
+    @x = cxt_four();
+    sub cxt_five { sort { test_if_scalar($a,$b); } 1,2 }
+    @x = cxt_five();
+    sub cxt_six { sort test_if_scalar 1,2 }
+    @x = cxt_six();
 }
 
-$m = \&test_if_scalar;
-sub cxt_four { sort $m 1,2 }
-@x = cxt_four();
-sub cxt_five { sort { test_if_scalar($a,$b); } 1,2 }
-@x = cxt_five();
-sub cxt_six { sort test_if_scalar 1,2 }
-@x = cxt_six();
 
 # test against a reentrancy bug
 {
@@ -316,89 +312,81 @@ sub cxt_six { sort test_if_scalar 1,2 }
 	Bar::reenter() unless $init++;
 	$a <=> $b
     } qw/4 3 1 2/;
-    main::cmp_ok("@b",'eq','1 2 3 4','reenter 1');
+    cmp_ok("@b",'eq','1 2 3 4','reenter 1');
 
-    main::ok(!$def,'reenter 2');
+    ok(!$def,'reenter 2');
 }
 
 
 {
     sub routine { "one", "two" };
     @a = sort(routine(1));
-    main::cmp_ok("@a",'eq',"one two",'bug id 19991001.003');
+    cmp_ok("@a",'eq',"one two",'bug id 19991001.003');
 }
 
 
-#my $test = 59;
-sub ok { main::cmp_ok($_[0],'eq',$_[1],$_[2]);
-#    print "not " unless $_[0] eq $_[1];
-#    print "ok $test - $_[2]\n";
-#    print "#[$_[0]] ne [$_[1]]\n" unless $_[0] eq $_[1];
-#    $test++;
-}
-
 # check for in-place optimisation of @a = sort @a
 {
     my ($r1,$r2,@a);
     our @g;
     @g = (3,2,1); $r1 = \$g[2]; @g = sort @g; $r2 = \$g[0];
-    ok "$r1-@g", "$r2-1 2 3", "inplace sort of global";
+    is "$r1-@g", "$r2-1 2 3", "inplace sort of global";
 
     @a = qw(b a c); $r1 = \$a[1]; @a = sort @a; $r2 = \$a[0];
-    ok "$r1-@a", "$r2-a b c", "inplace sort of lexical";
+    is "$r1-@a", "$r2-a b c", "inplace sort of lexical";
 
     @g = (2,3,1); $r1 = \$g[1]; @g = sort { $b <=> $a } @g; $r2 = \$g[0];
-    ok "$r1-@g", "$r2-3 2 1", "inplace reversed sort of global";
+    is "$r1-@g", "$r2-3 2 1", "inplace reversed sort of global";
 
     @g = (2,3,1);
     $r1 = \$g[1]; @g = sort { $a<$b?1:$a>$b?-1:0 } @g; $r2 = \$g[0];
-    ok "$r1-@g", "$r2-3 2 1", "inplace custom sort of global";
+    is "$r1-@g", "$r2-3 2 1", "inplace custom sort of global";
 
     sub mysort { $b cmp $a };
     @a = qw(b c a); $r1 = \$a[1]; @a = sort mysort @a; $r2 = \$a[0];
-    ok "$r1-@a", "$r2-c b a", "inplace sort with function of lexical";
+    is "$r1-@a", "$r2-c b a", "inplace sort with function of lexical";
 
     use Tie::Array;
     my @t;
     tie @t, 'Tie::StdArray';
 
     @t = qw(b c a); @t = sort @t;
-    ok "@t", "a b c", "inplace sort of tied array";
+    is "@t", "a b c", "inplace sort of tied array";
 
     @t = qw(b c a); @t = sort mysort @t;
-    ok "@t", "c b a", "inplace sort of tied array with function";
+    is "@t", "c b a", "inplace sort of tied array with function";
 
     #  [perl #29790] don't optimise @a = ('a', sort @a) !
 
     @g = (3,2,1); @g = ('0', sort @g);
-    ok "@g", "0 1 2 3", "un-inplace sort of global";
+    is "@g", "0 1 2 3", "un-inplace sort of global";
     @g = (3,2,1); @g = (sort(@g),'4');
-    ok "@g", "1 2 3 4", "un-inplace sort of global 2";
+    is "@g", "1 2 3 4", "un-inplace sort of global 2";
 
     @a = qw(b a c); @a = ('x', sort @a);
-    ok "@a", "x a b c", "un-inplace sort of lexical";
+    is "@a", "x a b c", "un-inplace sort of lexical";
     @a = qw(b a c); @a = ((sort @a), 'x');
-    ok "@a", "a b c x", "un-inplace sort of lexical 2";
+    is "@a", "a b c x", "un-inplace sort of lexical 2";
 
     @g = (2,3,1); @g = ('0', sort { $b <=> $a } @g);
-    ok "@g", "0 3 2 1", "un-inplace reversed sort of global";
+    is "@g", "0 3 2 1", "un-inplace reversed sort of global";
     @g = (2,3,1); @g = ((sort { $b <=> $a } @g),'4');
-    ok "@g", "3 2 1 4", "un-inplace reversed sort of global 2";
+    is "@g", "3 2 1 4", "un-inplace reversed sort of global 2";
 
     @g = (2,3,1); @g = ('0', sort { $a<$b?1:$a>$b?-1:0 } @g);
-    ok "@g", "0 3 2 1", "un-inplace custom sort of global";
+    is "@g", "0 3 2 1", "un-inplace custom sort of global";
     @g = (2,3,1); @g = ((sort { $a<$b?1:$a>$b?-1:0 } @g),'4');
-    ok "@g", "3 2 1 4", "un-inplace custom sort of global 2";
+    is "@g", "3 2 1 4", "un-inplace custom sort of global 2";
 
     @a = qw(b c a); @a = ('x', sort mysort @a);
-    ok "@a", "x c b a", "un-inplace sort with function of lexical";
+    is "@a", "x c b a", "un-inplace sort with function of lexical";
     @a = qw(b c a); @a = ((sort mysort @a),'x');
-    ok "@a", "c b a x", "un-inplace sort with function of lexical 2";
+    is "@a", "c b a x", "un-inplace sort with function of lexical 2";
 
     # RT#54758. Git 62b40d2474e7487e6909e1872b6bccdf812c6818
     no warnings 'void';
     my @m; push @m, 0 for 1 .. 1024; $#m; @m = sort @m;
-    main::pass("in-place sorting segfault");
+    ::pass("in-place sorting segfault");
 }
 
 # Test optimisations of reversed sorts. As we now guarantee stability by
@@ -424,77 +412,77 @@ sub generate {
 
 my @input = &generate;
 my @output = sort @input;
-ok join(" ", map {0+$_} @output), "0 1 2 3 4 5 6 7 8", "Simple stable sort";
+is join(" ", map {0+$_} @output), "0 1 2 3 4 5 6 7 8", "Simple stable sort";
 
 @input = &generate;
 @input = sort @input;
-ok join(" ", map {0+$_} @input), "0 1 2 3 4 5 6 7 8",
+is join(" ", map {0+$_} @input), "0 1 2 3 4 5 6 7 8",
     "Simple stable in place sort";
 
 # This won't be very interesting
 @input = &generate;
 @output = sort {$a <=> $b} @input;
-ok "@output", "A A A B B B C C C", 'stable $a <=> $b sort';
+is "@output", "A A A B B B C C C", 'stable $a <=> $b sort';
 
 @input = &generate;
 @output = sort {$a cmp $b} @input;
-ok join(" ", map {0+$_} @output), "0 1 2 3 4 5 6 7 8", 'stable $a cmp $b sort';
+is join(" ", map {0+$_} @output), "0 1 2 3 4 5 6 7 8", 'stable $a cmp $b sort';
 
 @input = &generate;
 @input = sort {$a cmp $b} @input;
-ok join(" ", map {0+$_} @input), "0 1 2 3 4 5 6 7 8",
+is join(" ", map {0+$_} @input), "0 1 2 3 4 5 6 7 8",
     'stable $a cmp $b in place sort';
 
 @input = &generate;
 @output = sort {$b cmp $a} @input;
-ok join(" ", map {0+$_} @output), "6 7 8 3 4 5 0 1 2", 'stable $b cmp $a sort';
+is join(" ", map {0+$_} @output), "6 7 8 3 4 5 0 1 2", 'stable $b cmp $a sort';
 
 @input = &generate;
 @input = sort {$b cmp $a} @input;
-ok join(" ", map {0+$_} @input), "6 7 8 3 4 5 0 1 2",
+is join(" ", map {0+$_} @input), "6 7 8 3 4 5 0 1 2",
     'stable $b cmp $a in place sort';
 
 @input = &generate;
 @output = reverse sort @input;
-ok join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0", "Reversed stable sort";
+is join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0", "Reversed stable sort";
 
 @input = &generate;
 @input = reverse sort @input;
-ok join(" ", map {0+$_} @input), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @input), "8 7 6 5 4 3 2 1 0",
     "Reversed stable in place sort";
 
 @input = &generate;
 my $output = reverse sort @input;
-ok $output, "CCCBBBAAA", "Reversed stable sort in scalar context";
+is $output, "CCCBBBAAA", "Reversed stable sort in scalar context";
 
 
 @input = &generate;
 @output = reverse sort {$a cmp $b} @input;
-ok join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
     'reversed stable $a cmp $b sort';
 
 @input = &generate;
 @input = reverse sort {$a cmp $b} @input;
-ok join(" ", map {0+$_} @input), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @input), "8 7 6 5 4 3 2 1 0",
     'revesed stable $a cmp $b in place sort';
 
 @input = &generate;
 $output = reverse sort {$a cmp $b} @input;
-ok $output, "CCCBBBAAA", 'Reversed stable $a cmp $b sort in scalar context';
+is $output, "CCCBBBAAA", 'Reversed stable $a cmp $b sort in scalar context';
 
 @input = &generate;
 @output = reverse sort {$b cmp $a} @input;
-ok join(" ", map {0+$_} @output), "2 1 0 5 4 3 8 7 6",
+is join(" ", map {0+$_} @output), "2 1 0 5 4 3 8 7 6",
     'reversed stable $b cmp $a sort';
 
 @input = &generate;
 @input = reverse sort {$b cmp $a} @input;
-ok join(" ", map {0+$_} @input), "2 1 0 5 4 3 8 7 6",
+is join(" ", map {0+$_} @input), "2 1 0 5 4 3 8 7 6",
     'revesed stable $b cmp $a in place sort';
 
 @input = &generate;
 $output = reverse sort {$b cmp $a} @input;
-ok $output, "AAABBBCCC", 'Reversed stable $b cmp $a sort in scalar context';
+is $output, "AAABBBCCC", 'Reversed stable $b cmp $a sort in scalar context';
 
 sub stuff {
     # Something complex enough to defeat any constant folding optimiser
@@ -503,27 +491,27 @@ sub stuff {
 
 @input = &generate;
 @output = reverse sort {stuff || $a cmp $b} @input;
-ok join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
     'reversed stable complex sort';
 
 @input = &generate;
 @input = reverse sort {stuff || $a cmp $b} @input;
-ok join(" ", map {0+$_} @input), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @input), "8 7 6 5 4 3 2 1 0",
     'revesed stable complex in place sort';
 
 @input = &generate;
 $output = reverse sort {stuff || $a cmp $b } @input;
-ok $output, "CCCBBBAAA", 'Reversed stable complex sort in scalar context';
+is $output, "CCCBBBAAA", 'Reversed stable complex sort in scalar context';
 
 sub sortr {
     reverse sort @_;
 }
 
 @output = sortr &generate;
-ok join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
     'reversed stable sort return list context';
 $output = sortr &generate;
-ok $output, "CCCBBBAAA",
+is $output, "CCCBBBAAA",
     'reversed stable sort return scalar context';
 
 sub sortcmpr {
@@ -531,10 +519,10 @@ sub sortcmpr {
 }
 
 @output = sortcmpr &generate;
-ok join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
     'reversed stable $a cmp $b sort return list context';
 $output = sortcmpr &generate;
-ok $output, "CCCBBBAAA",
+is $output, "CCCBBBAAA",
     'reversed stable $a cmp $b sort return scalar context';
 
 sub sortcmprba {
@@ -542,10 +530,10 @@ sub sortcmprba {
 }
 
 @output = sortcmprba &generate;
-ok join(" ", map {0+$_} @output), "2 1 0 5 4 3 8 7 6",
+is join(" ", map {0+$_} @output), "2 1 0 5 4 3 8 7 6",
     'reversed stable $b cmp $a sort return list context';
 $output = sortcmprba &generate;
-ok $output, "AAABBBCCC",
+is $output, "AAABBBCCC",
 'reversed stable $b cmp $a sort return scalar context';
 
 sub sortcmprq {
@@ -553,10 +541,10 @@ sub sortcmprq {
 }
 
 @output = sortcmpr &generate;
-ok join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
+is join(" ", map {0+$_} @output), "8 7 6 5 4 3 2 1 0",
     'reversed stable complex sort return list context';
 $output = sortcmpr &generate;
-ok $output, "CCCBBBAAA",
+is $output, "CCCBBBAAA",
     'reversed stable complex sort return scalar context';
 
 # And now with numbers
@@ -569,148 +557,148 @@ sub generate1 {
 # This won't be very interesting
 @input = &generate1;
 @output = sort {$a cmp $b} @input;
-ok "@output", "A B C D E F G H I", 'stable $a cmp $b sort';
+is "@output", "A B C D E F G H I", 'stable $a cmp $b sort';
 
 @input = &generate1;
 @output = sort {$a <=> $b} @input;
-ok "@output", "A B C D E F G H I", 'stable $a <=> $b sort';
+is "@output", "A B C D E F G H I", 'stable $a <=> $b sort';
 
 @input = &generate1;
 @input = sort {$a <=> $b} @input;
-ok "@input", "A B C D E F G H I", 'stable $a <=> $b in place sort';
+is "@input", "A B C D E F G H I", 'stable $a <=> $b in place sort';
 
 @input = &generate1;
 @output = sort {$b <=> $a} @input;
-ok "@output", "G H I D E F A B C", 'stable $b <=> $a sort';
+is "@output", "G H I D E F A B C", 'stable $b <=> $a sort';
 
 @input = &generate1;
 @input = sort {$b <=> $a} @input;
-ok "@input", "G H I D E F A B C", 'stable $b <=> $a in place sort';
+is "@input", "G H I D E F A B C", 'stable $b <=> $a in place sort';
 
 # test that optimized {$b cmp $a} and {$b <=> $a} remain stable
 # (new in 5.9) without overloading
 { no warnings;
 @b = sort { $b <=> $a } @input = qw/5first 6first 5second 6second/;
-ok "@b" , "6first 6second 5first 5second", "optimized {$b <=> $a} without overloading" ;
+is "@b" , "6first 6second 5first 5second", "optimized {$b <=> $a} without overloading" ;
 @input = sort {$b <=> $a} @input;
-ok "@input" , "6first 6second 5first 5second","inline optimized {$b <=> $a} without overloading" ;
+is "@input" , "6first 6second 5first 5second","inline optimized {$b <=> $a} without overloading" ;
 };
 
 # These two are actually doing string cmp on 0 1 and 2
 @input = &generate1;
 @output = reverse sort @input;
-ok "@output", "I H G F E D C B A", "Reversed stable sort";
+is "@output", "I H G F E D C B A", "Reversed stable sort";
 
 @input = &generate1;
 @input = reverse sort @input;
-ok "@input", "I H G F E D C B A", "Reversed stable in place sort";
+is "@input", "I H G F E D C B A", "Reversed stable in place sort";
 
 @input = &generate1;
 $output = reverse sort @input;
-ok $output, "IHGFEDCBA", "Reversed stable sort in scalar context";
+is $output, "IHGFEDCBA", "Reversed stable sort in scalar context";
 
 @input = &generate1;
 @output = reverse sort {$a <=> $b} @input;
-ok "@output", "I H G F E D C B A", 'reversed stable $a <=> $b sort';
+is "@output", "I H G F E D C B A", 'reversed stable $a <=> $b sort';
 
 @input = &generate1;
 @input = reverse sort {$a <=> $b} @input;
-ok "@input", "I H G F E D C B A", 'revesed stable $a <=> $b in place sort';
+is "@input", "I H G F E D C B A", 'revesed stable $a <=> $b in place sort';
 
 @input = &generate1;
 $output = reverse sort {$a <=> $b} @input;
-ok $output, "IHGFEDCBA", 'reversed stable $a <=> $b sort in scalar context';
+is $output, "IHGFEDCBA", 'reversed stable $a <=> $b sort in scalar context';
 
 @input = &generate1;
 @output = reverse sort {$b <=> $a} @input;
-ok "@output", "C B A F E D I H G", 'reversed stable $b <=> $a sort';
+is "@output", "C B A F E D I H G", 'reversed stable $b <=> $a sort';
 
 @input = &generate1;
 @input = reverse sort {$b <=> $a} @input;
-ok "@input", "C B A F E D I H G", 'revesed stable $b <=> $a in place sort';
+is "@input", "C B A F E D I H G", 'revesed stable $b <=> $a in place sort';
 
 @input = &generate1;
 $output = reverse sort {$b <=> $a} @input;
-ok $output, "CBAFEDIHG", 'reversed stable $b <=> $a sort in scalar context';
+is $output, "CBAFEDIHG", 'reversed stable $b <=> $a sort in scalar context';
 
 @input = &generate1;
 @output = reverse sort {stuff || $a <=> $b} @input;
-ok "@output", "I H G F E D C B A", 'reversed stable complex sort';
+is "@output", "I H G F E D C B A", 'reversed stable complex sort';
 
 @input = &generate1;
 @input = reverse sort {stuff || $a <=> $b} @input;
-ok "@input", "I H G F E D C B A", 'revesed stable complex in place sort';
+is "@input", "I H G F E D C B A", 'revesed stable complex in place sort';
 
 @input = &generate1;
 $output = reverse sort {stuff || $a <=> $b} @input;
-ok $output, "IHGFEDCBA", 'reversed stable complex sort in scalar context';
+is $output, "IHGFEDCBA", 'reversed stable complex sort in scalar context';
 
 sub sortnumr {
     reverse sort {$a <=> $b} @_;
 }
 
 @output = sortnumr &generate1;
-ok "@output", "I H G F E D C B A",
+is "@output", "I H G F E D C B A",
     'reversed stable $a <=> $b sort return list context';
 $output = sortnumr &generate1;
-ok $output, "IHGFEDCBA", 'reversed stable $a <=> $b sort return scalar context';
+is $output, "IHGFEDCBA", 'reversed stable $a <=> $b sort return scalar context';
 
 sub sortnumrba {
     reverse sort {$b <=> $a} @_;
 }
 
 @output = sortnumrba &generate1;
-ok "@output", "C B A F E D I H G",
+is "@output", "C B A F E D I H G",
     'reversed stable $b <=> $a sort return list context';
 $output = sortnumrba &generate1;
-ok $output, "CBAFEDIHG", 'reversed stable $b <=> $a sort return scalar context';
+is $output, "CBAFEDIHG", 'reversed stable $b <=> $a sort return scalar context';
 
 sub sortnumrq {
     reverse sort {stuff || $a <=> $b} @_;
 }
 
 @output = sortnumrq &generate1;
-ok "@output", "I H G F E D C B A",
+is "@output", "I H G F E D C B A",
     'reversed stable complex sort return list context';
 $output = sortnumrq &generate1;
-ok $output, "IHGFEDCBA", 'reversed stable complex sort return scalar context';
+is $output, "IHGFEDCBA", 'reversed stable complex sort return scalar context';
 
 @output = reverse (sort(qw(C A B)), 0);
-ok "@output", "0 C B A", 'reversed sort with trailing argument';
+is "@output", "0 C B A", 'reversed sort with trailing argument';
 
 @output = reverse (0, sort(qw(C A B)));
-ok "@output", "C B A 0", 'reversed sort with leading argument';
+is "@output", "C B A 0", 'reversed sort with leading argument';
 
 eval { @output = sort {goto sub {}} 1,2; };
 $fail_msg = q(Can't goto subroutine outside a subroutine);
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto subr outside subr');
+cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto subr outside subr');
 
 
 
 sub goto_sub {goto sub{}}
 eval { @output = sort goto_sub 1,2; };
 $fail_msg = q(Can't goto subroutine from a sort sub);
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto subr from a sort sub');
+cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto subr from a sort sub');
 
 
 
 eval { @output = sort {goto label} 1,2; };
 $fail_msg = q(Can't "goto" out of a pseudo block);
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto out of a pseudo block 1');
+cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto out of a pseudo block 1');
 
 
 
 sub goto_label {goto label}
 label: eval { @output = sort goto_label 1,2; };
 $fail_msg = q(Can't "goto" out of a pseudo block);
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto out of a pseudo block 2');
+cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'goto out of a pseudo block 2');
 
 
 
 sub self_immolate {undef &self_immolate; $a<=>$b}
 eval { @output = sort self_immolate 1,2,3 };
 $fail_msg = q(Can't undef active subroutine);
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'undef active subr');
+cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'undef active subr');
 
 
 
@@ -729,13 +717,12 @@ main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'undef active subr');
     }
 
     rec(1);
-    main::ok(!$failed, "sort from active sub");
+    ok(!$failed, "sort from active sub");
 }
 
 # $a and $b are set in the package the sort() is called from,
 # *not* the package the sort sub is in. This is longstanding
 # de facto behaviour that shouldn't be broken.
-package main;
 my $answer = "good";
 () = sort OtherPack::foo 1,2,3,4;
 
@@ -749,62 +736,68 @@ my $answer = "good";
     }
 }
 
-main::cmp_ok($answer,'eq','good','sort subr called from other package');
+cmp_ok($answer,'eq','good','sort subr called from other package');
 
 
 # Bug 36430 - sort called in package2 while a
 # sort in package1 is active should set $package2::a/b.
-
-$answer = "good";
-my @list = sort { A::min(@$a) <=> A::min(@$b) }
-  [3, 1, 5], [2, 4], [0];
-
-main::cmp_ok($answer,'eq','good','bug 36430');
-
-package A;
-sub min {
-  my @list = sort {
-    $answer = '$a and/or $b are not defined ' if !defined($a) || !defined($b);
-    $a <=> $b;
-  } @_;
-  $list[0];
+{
+    my $answer = "good";
+    my @list = sort { A::min(@$a) <=> A::min(@$b) }
+      [3, 1, 5], [2, 4], [0];
+
+    cmp_ok($answer,'eq','good','bug 36430');
+
+    package A;
+    sub min {
+        my @list = sort {
+            $answer = '$a and/or $b are not defined ' if !defined($a) || !defined($b);
+            $a <=> $b;
+        } @_;
+        $list[0];
+    }
 }
 
+
 # Bug 7567 - an array shouldn't be modifiable while it's being
 # sorted in-place.
-eval { @a=(1..8); @a = sort { @a = (0) } @a; };
-
-$fail_msg = q(Modification of a read-only value attempted);
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'bug 7567');
+{
+    eval { @a=(1..8); @a = sort { @a = (0) } @a; };
 
+    $fail_msg = q(Modification of a read-only value attempted);
+    cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'bug 7567');
+}
 
 
 # Sorting shouldn't increase the refcount of a sub
-sub foo {(1+$a) <=> (1+$b)}
-my $refcnt = &Internals::SvREFCNT(\&foo);
-@output = sort foo 3,7,9;
-package Foo;
-ok($refcnt, &Internals::SvREFCNT(\&foo), "sort sub refcnt");
-$fail_msg = q(Modification of a read-only value attempted);
-# Sorting a read-only array in-place shouldn't be allowed
-my @readonly = (1..10);
-Internals::SvREADONLY(@readonly, 1);
-eval { @readonly = sort @readonly; };
-main::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'in-place sort of read-only array');
-
-
+{
+    sub foo {(1+$a) <=> (1+$b)}
+    my $refcnt = &Internals::SvREFCNT(\&foo);
+    @output = sort foo 3,7,9;
+
+    {
+        package Foo;
+        ::is($refcnt, &Internals::SvREFCNT(\&foo), "sort sub refcnt");
+        $fail_msg = q(Modification of a read-only value attempted);
+        # Sorting a read-only array in-place shouldn't be allowed
+        my @readonly = (1..10);
+        Internals::SvREADONLY(@readonly, 1);
+        eval { @readonly = sort @readonly; };
+        ::cmp_ok(substr($@,0,length($fail_msg)),'eq',$fail_msg,'in-place sort of read-only array');
+    }
+}
 
 
 # Using return() should be okay even in a deeper context
 @b = sort {while (1) {return ($a <=> $b)} } 1..10;
-ok("@b", "1 2 3 4 5 6 7 8 9 10", "return within loop");
+is("@b", "1 2 3 4 5 6 7 8 9 10", "return within loop");
 
 # Using return() should be okay even if there are other items
 # on the stack at the time.
 @b = sort {$_ = ($a<=>$b) + do{return $b<=> $a}} 1..10;
-ok("@b", "10 9 8 7 6 5 4 3 2 1", "return with SVs on stack");
+is("@b", "10 9 8 7 6 5 4 3 2 1", "return with SVs on stack");
 
 # As above, but with a sort sub rather than a sort block.
 sub ret_with_stacked { $_ = ($a<=>$b) + do {return $b <=> $a} }
 @b = sort ret_with_stacked 1..10;
-ok("@b", "10 9 8 7 6 5 4 3 2 1", "return with SVs on stack");
+is("@b", "10 9 8 7 6 5 4 3 2 1", "return with SVs on stack");