use strict;
use warnings;

use Test::More 0.88;

use constant NON_EXISTENT_OS => 'titanix'; #the system they said could not go down...

#--------------------------------------------------------------------------#
# API tests
#--------------------------------------------------------------------------#

require_ok( 'Perl::OSType' );

can_ok( 'Perl::OSType', 'os_type' );

my @functions = qw/os_type is_os_type/ ;
for my $sub ( @functions ) {
  ok( eval { Perl::OSType->import($sub); 1 }, "importing $sub()" );
  can_ok( 'main', $sub );
}

my $test_pkg = "testpackage$$";

ok( eval "package $test_pkg; use Perl::OSType ':all'; 1",
  "Testing 'use Perl::OSType qw/:all/'"
);

can_ok( $test_pkg, @functions );


#--------------------------------------------------------------------------#
# os_type
#--------------------------------------------------------------------------#

{
  my $fcn = 'os_type()';

  ok( my $current_type = os_type(), "$fcn: without arguments" );

  is( $current_type, os_type( $^O ), "... matches os_type($^O)" );

  is(os_type( NON_EXISTENT_OS ), '', "$fcn: unknown OS returns empty string");

  is(os_type( '' ), '', "$fcn: empty string returns empty string");

  local $^O = 'linux';

  is(os_type( undef ), 'Unix', "$fcn: explicit undef uses $^O");
}

#--------------------------------------------------------------------------#
# is_os_type
#--------------------------------------------------------------------------#

{
  my $fcn = 'is_os_type()';

  is(is_os_type(NON_EXISTENT_OS), '', "$fcn: non-existent type is false");

  is(is_os_type(''), undef, "$fcn: empty string type is false");

  is(is_os_type('Unix', NON_EXISTENT_OS), '', "$fcn: non-existent OS is false");

  local $^O = 'VOS';
  ok( ! is_os_type( 'Unix' ), "$fcn: false" );
  ok( is_os_type( 'VOS' ),    "$fcn: true" );
  ok( ! is_os_type(), "$fcn: false if no type provided" );
}

done_testing;