Check warnings::enabled & warnings::warn

__END__

--FILE-- abc.pm
package abc ;
use warnings "io" ;
print "ok1\n" if ! warnings::enabled() ;
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() ;
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() ;
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() ;
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 ;
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 ;
  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 ;
  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 ;
  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 ;
  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() ;
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() ;
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() ;
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 ;
  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 ;
  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 ;
  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 ;
  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 ;
  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 ;
}
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 ;
  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") } ;
print $@ ;
EXPECT
Usage: warnings::warn('category', 'message') at - line 4
Usage: warnings::warn('category', 'message') 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
]]