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    ];
my $aoh = [
    { foo => 1, bar => 2,     baz => 3  },
    { foo => 2, bar => "a b", baz => "" },
    ];

for (qw( after_in on_in before_out )) {
    is_deeply (csv (in => $tfn, $_ => sub {}), $aoa, "callback $_ on AOA with empty sub");
    is_deeply (csv (in => $tfn, callbacks => { $_ => sub {} }), $aoa, "callback $_ on AOA with empty sub");
    }
is_deeply (csv (in => $tfn, after_in => sub {},
    callbacks => { on_in => sub {} }), $aoa, "callback after_in and on_in on AOA");

for (qw( after_in on_in before_out )) {
    is_deeply (csv (in => $tfn, headers => "auto", $_ => sub {}), $aoh, "callback $_ on AOH with empty sub");
    is_deeply (csv (in => $tfn, headers => "auto", callbacks => { $_ => sub {} }), $aoh, "callback $_ on AOH with empty sub");
    }
is_deeply (csv (in => $tfn, headers => "auto", after_in => sub {},
    callbacks => { on_in => sub {} }), $aoh, "callback after_in and on_in on AOH");

is_deeply (csv (in => $tfn, after_in => sub { push @{$_[1]}, "A" }), [
    [qw( foo bar baz A )],
    [ 1, 2, 3, "A" ],
    [ 2, "a b", "", "A" ],
    ], "AOA ith after_in callback");

is_deeply (csv (in => $tfn, headers => "auto", after_in => sub { $_[1]{baz} = "A" }), [
    { foo => 1, bar => 2, baz => "A" },
    { foo => 2, bar => "a b", baz => "A" },
    ], "AOH with after_in callback");

is_deeply (csv (in => $tfn, filter => { 2 => sub { /a/ }}), [
    [qw( foo bar baz )],
    [ 2, "a b", "" ],
    ], "AOA with filter on col 2");
is_deeply (csv (in => $tfn, filter => { 2 => sub { /a/ },
					 1 => sub { length > 1 }}), [
    [qw( foo bar baz )],
    ], "AOA with filter on col 1 and 2");
is_deeply (csv (in => $tfn, filter => { foo => sub { $_ > 1 }}), [
    { foo => 2, bar => "a b", baz => "" },
    ], "AOH with filter on column name");

SKIP: {
    $] < 5.008001 and skip "No HOH/xx support in $]", 3;
    is_deeply (csv (in => $tfn, headers => "lc"),
		[ { foo => 1, bar => 2,     baz => 3 },
		  { foo => 2, bar => "a b", baz => "" }],
		"AOH with lc headers");
    is_deeply (csv (in => $tfn, headers => "uc"),
		[ { FOO => 1, BAR => 2,     BAZ => 3 },
		  { FOO => 2, BAR => "a b", BAZ => "" }],
		"AOH with lc headers");
    is_deeply (csv (in => $tfn, headers => sub { lcfirst uc $_[0] }),
		[ { fOO => 1, bAR => 2,     bAZ => 3 },
		  { fOO => 2, bAR => "a b", bAZ => "" }],
		"AOH with mangled headers");
    }

SKIP: {
    $] < 5.008001 and skip "No BOM support in $]", 1;
    is_deeply (csv (in => $tfn, munge => { bar => "boo" }),
	[{ baz =>  3, boo => 2,     foo => 1 },
	 { baz => "", boo => "a b", foo => 2 }], "Munge with hash");
    }

open  $fh, ">>", $tfn or die "$tfn: $!";
print $fh <<"EOD";
3,3,3
4,5,6
5,7,9
6,9,12
7,11,15
8,13,18
EOD
close $fh;

is_deeply (csv (in => $tfn,
	filter => { foo => sub { $_ > 2 && $_[1][2] - $_[1][1] < 4 }}), [
    { foo => 3, bar => 3, baz =>  3 },
    { foo => 4, bar => 5, baz =>  6 },
    { foo => 5, bar => 7, baz =>  9 },
    { foo => 6, bar => 9, baz => 12 },
    ], "AOH with filter on column name + on other numbered fields");

is_deeply (csv (in => $tfn,
	filter => { foo => sub { $_ > 2 && $_{baz}  - $_{bar}  < 4 }}), [
    { foo => 3, bar => 3, baz =>  3 },
    { foo => 4, bar => 5, baz =>  6 },
    { foo => 5, bar => 7, baz =>  9 },
    { foo => 6, bar => 9, baz => 12 },
    ], "AOH with filter on column name + on other named fields");

# Check content ref in on_in AOA
{   my $aoa = csv (
	in          => $tfn,
	filter      => { 1 => sub { m/^[3-9]/ }},
	on_in       => sub {
	    is ($_[1][1], 2 * $_[1][0] - 3, "AOA $_[1][0]: b = 2a - 3 \$_[1][]");
	    });
    }
# Check content ref in on_in AOH
{   my $aoa = csv (
	in          => $tfn,
	headers     => "auto",
	filter      => { foo => sub { m/^[3-9]/ }},
	after_parse => sub {
	    is ($_[1]{bar}, 2 * $_[1]{foo} - 3, "AOH $_[1]{foo}: b = 2a - 3 \$_[1]{}");
	    });
    }
# Check content ref in on_in AOH with aliases %_
SKIP: {
    $] < 5.008001 and skip "No AOH/alias support in $]", 7; # 6 in on_in, 1 is_deeply
    %_ = ( brt => 42 );
    my $aoa = csv (
	in          => $tfn,
	headers     => "auto",
	filter      => { foo => sub { m/^[3-9]/ }},
	on_in       => sub {
	    is ($_{bar}, 2 * $_{foo} - 3, "AOH $_{foo}: b = 2a - 3 \$_{}");
	    });