throws_ok { $common->fill_in( '$foo', bar => 42 ) } qr/unknown var/, 'fill_in no variable';
cmp_ok( $common->fill_in( 'foo = $foo bar = $bar', foo => 42, bar => 1 ), 'eq', 'foo = 42 bar = 1', 'fill_in' );
throws_ok { $common->fill_in( '$foo', bar => 42 ) } qr/unknown var/, 'fill_in no variable';
cmp_ok( $common->fill_in( 'foo = $foo bar = $bar', foo => 42, bar => 1 ), 'eq', 'foo = 42 bar = 1', 'fill_in' );