Check warnings::enabled & warnings::warn

__END__

--FILE-- abc.pm
package abc ;
use warnings "io" ;
print "ok1\n" if ! warnings::enabled('all') ;
print "ok2\n" if ! warnings::enabled("io") ;
1;
--FILE-- 
no warnings;
use abc ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
no warnings ;
print "ok1\n" if !warnings::enabled('all') ;
print "ok2\n" if warnings::enabled("syntax") ;
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
use warnings 'syntax' ;
print "ok1\n" if   warnings::enabled('io') ;
print "ok2\n" if ! warnings::enabled("syntax") ;
1;
--FILE-- 
use warnings 'io' ;
use abc ;
EXPECT
ok1
ok2
########

--FILE-- abc
no warnings ;
print "ok1\n" if !warnings::enabled('all') ;
print "ok2\n" if warnings::enabled("syntax") ;
1;
--FILE-- 
use warnings 'syntax' ;
require "abc" ;
EXPECT
ok1
ok2
########

--FILE-- abc
use warnings 'syntax' ;
print "ok1\n" if ! warnings::enabled('all') ;
print "ok2\n" if ! warnings::enabled("syntax") ;
print "ok3\n" if   warnings::enabled("io") ;
1;
--FILE-- 
use warnings 'io' ;
require "abc" ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
no warnings ;
sub check {
  print "ok1\n" if !warnings::enabled('all') ;
  print "ok2\n" if warnings::enabled("syntax") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
abc::check() ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
sub check {
  print "ok1\n" if ! warnings::enabled('all') ;
  print "ok2\n" if   warnings::enabled("syntax") ;
  print "ok3\n" if ! warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc
package abc ;
no warnings ;
sub check {
  print "ok1\n" if !warnings::enabled('all') ;
  print "ok2\n" if warnings::enabled("syntax") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
require "abc" ;
abc::check() ;
EXPECT
ok1
ok2
########

--FILE-- abc
package abc ;
use warnings 'io' ;
sub check {
  print "ok1\n" if ! warnings::enabled('all') ;
  print "ok2\n" if   warnings::enabled("syntax") ;
  print "ok3\n" if ! warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
require "abc" ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings "io" ;
print "ok1\n" if ! warnings::enabled('all') ;
print "ok2\n" if ! warnings::enabled("io") ;
1;
--FILE-- def.pm
no warnings;
use abc ;
1;
--FILE-- 
use warnings;
use def ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
no warnings ;
print "ok1\n" if ! warnings::enabled('all') ;
print "ok2\n" if warnings::enabled("syntax") ;
print "ok3\n" if !warnings::enabled("io") ;
1;
--FILE-- def.pm
use warnings 'syntax' ;
print "ok4\n" if !warnings::enabled('all') ;
print "ok5\n" if warnings::enabled("io") ;
use abc ;
1;
--FILE--
use warnings 'io' ;
use def ;
EXPECT
ok1
ok2
ok3
ok4
ok5
########

--FILE-- abc.pm
package abc ;
no warnings ;
sub check {
  print "ok1\n" if !warnings::enabled('all') ;
  print "ok2\n" if warnings::enabled("syntax") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
eval { abc::check() ; };
print $@ ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
sub check {
  print "ok1\n" if ! warnings::enabled('all') ;
  print "ok2\n" if   warnings::enabled("syntax") ;
  print "ok3\n" if ! warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
eval { abc::check() ; } ;
print $@ ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc
package abc ;
no warnings ;
sub check {
  print "ok1\n" if !warnings::enabled('all') ;
  print "ok2\n" if warnings::enabled("syntax") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
require "abc" ;
eval { abc::check() ; } ;
print $@ ;
EXPECT
ok1
ok2
########

--FILE-- abc
package abc ;
use warnings 'io' ;
sub check {
  print "ok1\n" if !warnings::enabled('all') ;
  print "ok2\n" if warnings::enabled("syntax") ;
  print "ok3\n" if warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
require "abc" ;
eval { use warnings 'io' ; abc::check() ; };
abc::check() ; 
print $@ ;
EXPECT
ok1
ok2
ok3
ok1
ok2
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
sub check {
  print "ok1\n" if ! warnings::enabled('all') ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if ! warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
sub fred { abc::check() }
fred() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
sub check {
  print "ok1\n" if  ! warnings::enabled('all') ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
sub fred { no warnings ; abc::check() }
fred() ;
EXPECT
ok1
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
sub check {
  print "ok1\n" if  ! warnings::enabled('all') ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if  warnings::enabled("io") ;
  print "ok4\n" if  ! warnings::enabled("misc") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
sub fred { use warnings 'io'  ; abc::check() }
fred() ;
EXPECT
ok1
ok2
ok3
ok4
########

# check warnings::warn
use warnings ;
eval { warnings::warn() } ;
print $@ ;
eval { warnings::warn("fred", "joe") } ;
print $@ ;
EXPECT
Usage: warnings::warn([category,] 'message') at - line 4
unknown warnings category 'fred' at - line 6
	require 0 called at - line 6
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
sub check { warnings::warn("io", "hello") }
1;
--FILE--
use warnings "io" ;
use abc;
abc::check() ;
EXPECT
hello at - line 3
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
sub check { warnings::warn("misc", "hello") }
1;
--FILE--
use warnings "io" ;
use abc;
abc::check() ;
EXPECT
hello at - line 3
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
sub check { warnings::warn("io", "hello") }
1;
--FILE--
use warnings qw( FATAL deprecated ) ;
use abc;
eval { abc::check() ; } ;
print "[[$@]]\n";
EXPECT
hello at - line 3
[[]]
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
sub check { warnings::warn("io", "hello") }
1;
--FILE--
use warnings qw( FATAL io ) ;
use abc;
eval { abc::check() ; } ;
print "[[$@]]\n";
EXPECT
[[hello at - line 3
]]
########
-W
--FILE-- abc.pm
package abc ;
use warnings "io" ;
print "ok1\n" if warnings::enabled("io") ;
print "ok2\n" if warnings::enabled("all") ;
1;
--FILE-- 
no warnings;
use abc ;
EXPECT
ok1
ok2
########
-X
--FILE-- abc.pm
package abc ;
use warnings "io" ;
print "ok1\n" if !warnings::enabled("io") ;
print "ok2\n" if !warnings::enabled("all") ;
1;
--FILE-- 
use warnings;
use abc ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
no warnings ;
sub check {
  print "ok\n" if ! warnings::enabled() ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
abc::check() ;
EXPECT
package 'abc' not registered for warnings at - line 3
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
use warnings::register ;
sub check {
  print "ok1\n" if  warnings::enabled ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if !warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
use warnings 'abc' ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
use warnings::register ;
sub check {
  print "ok1\n" if !warnings::enabled ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if !warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
no warnings ;
use warnings::register ;
sub check {
  print "ok1\n" if warnings::enabled ;
  print "ok2\n" if warnings::enabled("syntax") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
use warnings 'abc' ;
eval { abc::check() ; };
print $@ ;
EXPECT
ok1
ok2
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
use warnings::register ;
sub check {
  print "ok1\n" if !warnings::enabled ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if !warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
eval { abc::check() ; } ;
print $@ ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
use warnings::register ;
sub check {
  print "ok1\n" if  warnings::enabled ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if !warnings::enabled("io") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
use warnings 'abc' ;
sub fred { abc::check() }
fred() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings 'io' ;
use warnings::register ;
sub check {
  print "ok1\n" if  ! warnings::enabled ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
sub fred { no warnings ; abc::check() }
fred() ;
EXPECT
ok1
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
use warnings::register;
sub check {
  print "ok1\n" if  warnings::enabled ;
  print "ok2\n" if  warnings::enabled("syntax") ;
  print "ok3\n" if  warnings::enabled("io") ;
  print "ok4\n" if  ! warnings::enabled("misc") ;
}
1;
--FILE-- 
use warnings 'syntax' ;
use abc ;
use warnings 'abc' ;
sub fred { use warnings 'io'  ; abc::check() }
fred() ;
EXPECT
ok1
ok2
ok3
ok4
########

--FILE-- abc.pm
package abc ;
use warnings 'misc' ;
use warnings::register;
sub check { warnings::warn("hello") }
1;
--FILE--
use abc;
use warnings "abc" ;
abc::check() ;
EXPECT
hello at - line 3
########

--FILE-- abc.pm
package abc ;
use warnings::register;
sub check { warnings::warn("hello") }
1;
--FILE--
use abc;
abc::check() ;
EXPECT
hello at - line 2
########

--FILE-- abc.pm
package abc ;
use warnings::register ;
sub check { warnings::warn("hello") }
1;
--FILE--
use abc;
use warnings qw( FATAL deprecated ) ;
eval { abc::check() ; } ;
print "[[$@]]\n";
EXPECT
hello at - line 3
[[]]
########

--FILE-- abc.pm
package abc ;
use warnings::register ;
sub check { warnings::warn("hello") }
1;
--FILE--
use abc;
use warnings qw( FATAL abc ) ;
eval { abc::check() ; } ;
print "[[$@]]\n";
EXPECT
[[hello at - line 3
]]
########
-W
--FILE-- abc.pm
package abc ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "ok1\n" if warnings::enabled() ;
  print "ok2\n" if warnings::enabled("io") ;
  print "ok3\n" if warnings::enabled("all") ;
}
1;
--FILE-- 
no warnings;
use abc ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########
-X
--FILE-- abc.pm
package abc ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "ok1\n" if !warnings::enabled() ;
  print "ok2\n" if !warnings::enabled("io") ;
  print "ok3\n" if !warnings::enabled("all") ;
}
1;
--FILE-- 
no warnings;
use abc ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "ok1\n" if warnings::enabled() ;
  print "ok2\n" if warnings::enabled("io") ;
  print "ok3\n" if warnings::enabled("all") ;
}
1;
--FILE-- 
use warnings 'all';
use abc ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "ok1\n" if !warnings::enabled() ;
  print "ok2\n" if !warnings::enabled("io") ;
  print "ok3\n" if !warnings::enabled("all") ;
}
1;
--FILE-- 
use abc ;
no warnings ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "ok1\n" if !warnings::enabled() ;
  print "ok2\n" if !warnings::enabled("io") ;
  print "ok3\n" if !warnings::enabled("all") ;
}
1;
--FILE-- 
use abc ;
use warnings 'abc';
no warnings ;
abc::check() ;
EXPECT
ok1
ok2
ok3
########

--FILE-- abc.pm
package abc ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "abc self" . (warnings::enabled() ? "" : " not") . " enabled\n" ;
  print "abc def"  . (warnings::enabled('def') ? "" : " not") . " enabled\n" ;
  print "abc all"  . (warnings::enabled('all') ? "" : " not") . " enabled\n" ;
}
1;
--FILE-- def.pm
package def ;
use warnings "io" ;
use warnings::register ;
sub check { 
  print "def self" . (warnings::enabled() ? "" : " not") . " enabled\n" ;
  print "def abc"  . (warnings::enabled('abc') ? "" : " not") . " enabled\n" ;
  print "def all"  . (warnings::enabled('all') ? "" : " not") . " enabled\n" ;
}
1;
--FILE-- 
use abc ;
use def ;
use warnings 'abc';
abc::check() ;
def::check() ;
no warnings 'abc'  ;
use warnings 'def'  ;
abc::check() ;
def::check() ;
use warnings 'abc'  ;
use warnings 'def'  ;
abc::check() ;
def::check() ;
no warnings 'abc'  ;
no warnings 'def'  ;
abc::check() ;
def::check() ;
use warnings;
abc::check() ;
def::check() ;
no warnings 'abc' ;
abc::check() ;
def::check() ;
EXPECT
abc self enabled
abc def not enabled
abc all not enabled
def self not enabled
def abc enabled
def all not enabled
abc self not enabled
abc def enabled
abc all not enabled
def self enabled
def abc not enabled
def all not enabled
abc self enabled
abc def enabled
abc all not enabled
def self enabled
def abc enabled
def all not enabled
abc self not enabled
abc def not enabled
abc all not enabled
def self not enabled
def abc not enabled
def all not enabled
abc self enabled
abc def enabled
abc all enabled
def self enabled
def abc enabled
def all enabled
abc self not enabled
abc def enabled
abc all not enabled
def self enabled
def abc not enabled
def all not enabled