1#!./perl 2 3# $RCSfile: sort.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:24 $ 4 5print "1..19\n"; 6 7sub backwards { $a lt $b ? 1 : $a gt $b ? -1 : 0 } 8 9@harry = ('dog','cat','x','Cain','Abel'); 10@george = ('gone','chased','yz','punished','Axed'); 11 12$x = join('', sort @harry); 13print ($x eq 'AbelCaincatdogx' ? "ok 1\n" : "not ok 1\n"); 14print "# x = '$x'\n"; 15 16$x = join('', sort( backwards @harry)); 17print ($x eq 'xdogcatCainAbel' ? "ok 2\n" : "not ok 2\n"); 18print "# x = '$x'\n"; 19 20$x = join('', sort @george, 'to', @harry); 21print ($x eq 'AbelAxedCaincatchaseddoggonepunishedtoxyz'?"ok 3\n":"not ok 3\n"); 22print "# x = '$x'\n"; 23 24@a = (); 25@b = reverse @a; 26print ("@b" eq "" ? "ok 4\n" : "not ok 4 (@b)\n"); 27 28@a = (1); 29@b = reverse @a; 30print ("@b" eq "1" ? "ok 5\n" : "not ok 5 (@b)\n"); 31 32@a = (1,2); 33@b = reverse @a; 34print ("@b" eq "2 1" ? "ok 6\n" : "not ok 6 (@b)\n"); 35 36@a = (1,2,3); 37@b = reverse @a; 38print ("@b" eq "3 2 1" ? "ok 7\n" : "not ok 7 (@b)\n"); 39 40@a = (1,2,3,4); 41@b = reverse @a; 42print ("@b" eq "4 3 2 1" ? "ok 8\n" : "not ok 8 (@b)\n"); 43 44@a = (10,2,3,4); 45@b = sort {$a <=> $b;} @a; 46print ("@b" eq "2 3 4 10" ? "ok 9\n" : "not ok 9 (@b)\n"); 47 48$sub = 'backwards'; 49$x = join('', sort $sub @harry); 50print ($x eq 'xdogcatCainAbel' ? "ok 10\n" : "not ok 10\n"); 51 52# literals, combinations 53 54@b = sort (4,1,3,2); 55print ("@b" eq '1 2 3 4' ? "ok 11\n" : "not ok 11\n"); 56print "# x = '@b'\n"; 57 58@b = sort grep { $_ } (4,1,3,2); 59print ("@b" eq '1 2 3 4' ? "ok 12\n" : "not ok 12\n"); 60print "# x = '@b'\n"; 61 62@b = sort map { $_ } (4,1,3,2); 63print ("@b" eq '1 2 3 4' ? "ok 13\n" : "not ok 13\n"); 64print "# x = '@b'\n"; 65 66@b = sort reverse (4,1,3,2); 67print ("@b" eq '1 2 3 4' ? "ok 14\n" : "not ok 14\n"); 68print "# x = '@b'\n"; 69 70$^W = 0; 71# redefining sort sub inside the sort sub should fail 72sub twoface { *twoface = sub { $a <=> $b }; &twoface } 73eval { @b = sort twoface 4,1,3,2 }; 74print ($@ =~ /redefine active sort/ ? "ok 15\n" : "not ok 15\n"); 75 76# redefining sort subs outside the sort should not fail 77eval { *twoface = sub { &backwards } }; 78print $@ ? "not ok 16\n" : "ok 16\n"; 79 80eval { @b = sort twoface 4,1,3,2 }; 81print ("@b" eq '4 3 2 1' ? "ok 17\n" : "not ok 17 |@b|\n"); 82 83*twoface = sub { *twoface = *backwards; $a <=> $b }; 84eval { @b = sort twoface 4,1 }; 85print ($@ =~ /redefine active sort/ ? "ok 18\n" : "not ok 18\n"); 86 87*twoface = sub { 88 eval 'sub twoface { $a <=> $b }'; 89 die($@ =~ /redefine active sort/ ? "ok 19\n" : "not ok 19\n"); 90 $a <=> $b; 91 }; 92eval { @b = sort twoface 4,1 }; 93print $@ ? "$@" : "not ok 19\n"; 94