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|
use 5.005;
use strict;
# SAMPLE HIERARCHY TO TEST...
package Base1;
sub new { bless {}, ref($_[0])||$_[0] }
package Base2;
sub new { bless {}, ref($_[0])||$_[0] }
package Der1; @Der1::ISA = qw( Base1 );
package Der2; @Der2::ISA = qw( Base1 );
package Der3; @Der3::ISA = qw( Base2 );
package DerDer1; @DerDer1::ISA = qw( Der1 );
package DerDer2; @DerDer2::ISA = qw( Der2 );
package DerDer3; @DerDer3::ISA = qw( Der3 );
package DerDer4; @DerDer4::ISA = qw( Der3 );
# LOAD AND SHOOT...
package main;
BEGIN { $| = 1; print "1..350\n"; }
END {print "not ok 1\n" unless $::loaded;}
use Class::Multimethods;
$::loaded = 1;
print "ok 1\n";
# DEFINE SOME MULTIMETHODS ON THE ABOVE HIERARCHY...
multimethod mm => ('Base1', 'Base2') => sub { 1 };
multimethod mm => ('Base1', 'Der3') => sub { 2 };
multimethod mm => ('Base1', 'DerDer3') => sub { 3 };
multimethod mm => ('Der1', 'Base2') => sub { 4 };
multimethod mm => ('Base1', 'Base2', 'Base2') => sub { 11 };
multimethod mm => ('Base1', 'Der3', 'Der3') => sub { 12 };
# RESET EXPECTATIONS FOR EVERY POSSIBLE COMBINATION...
my @type1 = qw{Base1 Der1 Der2 DerDer1 DerDer2};
my @type2 = qw{Base2 Der3 DerDer3 DerDer4};
foreach my $type1 ( @type1, @type2 )
{
foreach my $type2 ( @type2, @type1 )
{
$::expect{$type1}{$type2} = 0;
}
}
# GIVEN THE ABOVE MULTIMETHODS, ONLY THESE TYPE COMBINATIONS SHOULD BE VIABLE...
$::expect{Base1}{Base2} = 1;
$::expect{Base1}{Der3} = 2;
$::expect{Base1}{DerDer3} = 3;
$::expect{Base1}{DerDer4} = 2;
$::expect{Der1}{Base2} = 4;
$::expect{Der1}{DerDer3} = 3;
$::expect{Der2}{Base2} = 1;
$::expect{Der2}{Der3} = 2;
$::expect{Der2}{DerDer3} = 3;
$::expect{Der2}{DerDer4} = 2;
$::expect{DerDer1}{Base2} = 4;
$::expect{DerDer1}{DerDer3} = 3;
$::expect{DerDer2}{Base2} = 1;
$::expect{DerDer2}{Der3} = 2;
$::expect{DerDer2}{DerDer3} = 3;
$::expect{DerDer2}{DerDer4} = 2;
# LOOP AND TEST EVERY COMBINATION (3 TIMES)...
$::n = 1;
for my $rep (1..3)
{
foreach my $type1 ( @type1, @type2 )
{
foreach my $type2 ( @type2, @type1 )
{
$::n++;
try($type1,$type2, $::expect{$type1}{$type2})
or print "not ";
print "ok $::n\n"
}
}
# ON THE LAST TIME THROUGH, ADD A NEW CASE THAT CHANGES SOME EXPECTATIONS...
if ($rep == 2)
{
multimethod mm => ('Der2', 'DerDer4') => sub { 5 };
$::expect{Der2}{DerDer4} = 5;
$::expect{DerDer2}{DerDer4} = 5;
# mm(new DerDer2, new DerDer4);
}
}
# TEST MULTIMETHODS ON NON-CLASS TYPES
multimethod mm => ('Der2', 'ARRAY') => sub { 6 };
multimethod mm => ('Der2', 'Regexp') => sub { 7 };
multimethod mm => ('Der2', '#') => sub { 8 };
multimethod mm => ('Der2', '$') => sub { 9 };
$::n++;
eval { mm(new Der2, [1,2,3]) == 6 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Der2, qr/\w*/) == 7 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Der2, 3) == 8 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Der2, "three") == 9 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Der2, "1a") == 9 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Base1, new Base2, new Base2) == 11 }
or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new DerDer1, new Der3, new Base2) == 11 }
or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Base1, new Der3, new Der3) == 12 }
or print "\n$@\n" and print "not ";
print "ok $::n\n";
$::n++;
eval { mm(new Base1, new DerDer3, new DerDer3) == 12 }
or print "\n$@\n" and print "not ";
print "ok $::n\n";
# HERE'S THE SUBROUTINE THAT POWERS THE DOUBLE LOOP ABOVE
sub try
{
# print "for: $_[0], $_[1]\n";
my $obj1 = eval "new $_[0]";
my $obj2 = eval "new $_[1]";
my $err = '';
my $res = 0;
eval { $res = mm($obj1, $obj2) } or $err = $@;
# print "\texpecting: $_[2], got: $res\n";
return $res == $_[2] || do {print "\n$err\n"; 0};
}
# TRY "CROSS-PACKAGE" MULTIMETHODS...
package elsewhere;
use Class::Multimethods;
multimethod 'mm';
$::n++;
eval { mm(new Der2, 1) == 8 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
multimethod mm => ('Der2', 'HASH') => sub { 10 };
$::n++;
eval { mm(new Der2, {a=>1}) == 10 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
# TEST ALTERNATE NAME INTRODUCING SYNTAX...
package otherwhere;
use Class::Multimethods 'mm';
$::n++;
eval { mm(new Der2, 1) == 8 } or print "\n$@\n" and print "not ";
print "ok $::n\n";
# TRY MULTIMETHODS AS CLASS METHODS...
package OtherClass;
use Class::Multimethods;
multimethod new => ('$','#') => sub { bless { num=>$_[1] }, $_[0] };
multimethod new => ('$','$') => sub { bless { str=>$_[1] }, $_[0] };
multimethod set => ('OtherClass','#') => sub { $_[0]->{num} = $_[1] };
multimethod set => ('OtherClass','$') => sub { $_[0]->{str} = $_[1] };
sub hasvals
{
for (keys %{$_[1]})
{
return undef unless $_[0]->{$_} eq $_[1]->{$_};
}
return 1;
return $_[0]
}
sub print
{
print "=====\n";
print "num: $_[0]->{num}\n" if $_[0]->{num};
print "str: $_[0]->{str}\n" if $_[0]->{str};
print "=====\n";
}
package main;
my $obj;
$obj = new OtherClass (42);
# $obj->print();
$::n++;
$obj->hasvals({num=>42}) or print "not ";
print "ok $::n\n";
$obj = new OtherClass ("cat");
# $obj->print();
$::n++;
$obj->hasvals({str=>"cat"}) or print "not ";
print "ok $::n\n";
$obj->set("dog");
# $obj->print();
$::n++;
$obj->hasvals({str=>"dog"}) or print "not ";
print "ok $::n\n";
$obj->set(99);
# $obj->print();
$::n++;
$obj->hasvals({num=>99, str=>"dog"}) or print "not ";
print "ok $::n\n";
# TEST INHERITANCE OF MULTIMETHOD CLASS METHODS...
package SonOfOtherClass;
@SonOfOtherClass::ISA = qw(OtherClass);
use Class::Multimethods;
multimethod set => ('OtherClass','ARRAY')
=> sub { $_[0]->{nums} = $_[1] };
sub print
{
print "=========\n";
$_[0]->SUPER::print();
print "nums: ", join(',', @{$_[0]->{nums}}), "\n"
if $_[0]->{nums};
print "=========\n";
}
package main;
$obj = new SonOfOtherClass (42);
# $obj->print();
$::n++;
$obj->hasvals({num=>42}) or print "not ";
print "ok $::n\n";
$obj = new SonOfOtherClass ("cat");
# $obj->print();
$::n++;
$obj->hasvals({str=>"cat"}) or print "not ";
print "ok $::n\n";
$obj->set("dog");
# $obj->print();
$::n++;
$obj->hasvals({str=>"dog"}) or print "not ";
print "ok $::n\n";
$obj->set(99);
# $obj->print();
$::n++;
$obj->hasvals({num=>99, str=>"dog"}) or print "not ";
print "ok $::n\n";
my $arr = [1,2,3,4,5];
$obj->set($arr);
# $obj->print();
$::n++;
$obj->hasvals({num=>99, str=>"dog", nums=>"$arr"}) or print "not ";
print "ok $::n\n";
# TEST WILDCARDS...
multimethod wild => ('Base1', 'Base2') => sub { 1 };
multimethod wild => ('Der1', 'Der3' ) => sub { 2 };
multimethod wild => ('Base1', '*' ) => sub { 3 };
multimethod wild => ('Base2', '*' ) => sub { 4 };
multimethod wild => ('*', 'Der3' ) => sub { 5 };
multimethod wild => ('*', '*' ) => sub { 6 };
# RESET EXPECTATIONS FOR EVERY POSSIBLE COMBINATION...
# CONSEQUENCES OF $::expect{'*'}{'*'} = 6;
foreach my $type1 ( @type1, @type2 )
{
foreach my $type2 ( @type2, @type1 )
{
$::expect{$type1}{$type2} = 6;
}
}
# CONSEQUENCES OF $::expect{Base1}{Base2} = 1;
foreach my $type1 ( @type1 )
{
foreach my $type2 ( @type2 )
{
$::expect{$type1}{$type2} = 1;
}
}
# CONSEQUENCES OF $::expect{Der1}{Der3} = 2;
foreach my $type1 (qw( Der1 DerDer1 ))
{
foreach my $type2 (qw( Der3 DerDer3 DerDer4 ))
{
$::expect{$type1}{$type2} = 2;
}
}
# CONSEQUENCES OF $::expect{Base1}{'*'} = 3;
foreach my $type1 ( @type1 )
{
foreach my $type2 ( @type1, @type2 )
{
$::expect{$type1}{$type2} = 3
if $::expect{$type1}{$type2} == 6 ;
}
}
# CONSEQUENCES OF $::expect{Base2}{'*'} = 4;
foreach my $type1 ( @type2 )
{
foreach my $type2 ( @type1, @type2 )
{
$::expect{$type1}{$type2} = 4
if $::expect{$type1}{$type2} == 6 ;
}
}
# CONSEQUENCES OF $::expect{'*'}{Der3} = 5;
foreach my $type1 ( @type1, @type2 )
{
foreach my $type2 (qw( Der3 DerDer3 DerDer4 ))
{
$::expect{$type1}{$type2} = 5
if $::expect{$type1}{$type2} == 6;
$::expect{$type1}{$type2} = 0
if $::expect{$type1}{$type2} == 3
|| $::expect{$type1}{$type2} == 4;
}
}
# CASES WHICH AREN'T AMBIGOUS, DESPITE THE PREVIOUS RULE
$::expect{Base2}{DerDer3} = 4; # 0 -> #4, 1 -> #5
$::expect{Base2}{DerDer4} = 4; # 0 -> #4, 1 -> #5
$::expect{Der3}{Der3} = 5; # 0 -> #5, 1 -> #4
$::expect{DerDer3}{Der3} = 5; # 0 -> #5, 2 -> #4
$::expect{DerDer4}{Der3} = 5; # 0 -> #5, 2 -> #4
$::expect{DerDer3}{DerDer3} = 5; # 1 -> #5, 2 -> #4
$::expect{DerDer4}{DerDer3} = 5; # 1 -> #5, 2 -> #4
$::expect{DerDer3}{DerDer4} = 5; # 1 -> #5, 2 -> #4
$::expect{DerDer4}{DerDer4} = 5; # 1 -> #5, 2 -> #4
# LOOP AND TEST EVERY COMBINATION...
foreach my $type1 ( @type1, @type2 )
{
foreach my $type2 ( @type2, @type1 )
{
$::n++;
wildtry($type1,$type2, $::expect{$type1}{$type2})
or print "not ";
print "ok $::n\n"
}
}
sub wildtry
{
# print "for: $_[0], $_[1]\n";
my $obj1 = eval "new $_[0]";
my $obj2 = eval "new $_[1]";
my $err = '';
my $res = 0;
eval { $res = wild($obj1, $obj2) } or $err = $@;
# print "\texpecting: $_[2], got: $res\n";
return $res == $_[2] || do {print "\n$err\n"; 0};
}
# TEST "INHERITANCE" OF '#' FROM '$'
multimethod val => ('$', '$') => sub { return '$$'; };
multimethod val => ('$', '#') => sub { return '$#'; };
multimethod val => ('#', '#') => sub { return '##'; };
$::n++;
val(1,2) eq '##' or print "not ";
print "ok $::n\n";
$::n++;
val('a',1) eq '$#' or print "not ";
print "ok $::n\n";
$::n++;
val('a','b') eq '$$' or print "not ";
print "ok $::n\n";
$::n++;
val(1,'a') eq '$$' or print "not ";
print "ok $::n\n";
|
