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#!perl -T
# -*- mode: cperl ; compile-command: "cd .. ; ./Build ; prove -vb t/06-*.t" -*-
BEGIN { $_ = defined && /(.*)/ && $1 for @ENV{qw/ TMPDIR TEMP TMP /} } # taint vs tempfile
use Test::More tests => 4*15 + 4*5 + 3*6 + 5*13; # non-default standard layers + output backend + internal exceptions + exits
use IO::Handle;
use File::Temp qw( tempfile );
use Data::Dump qw( dump );
use strict;
use warnings;
use Test::Trap; # XXX: testing ourselves ... too early, I suppose?
# The built-in non-default layers -- up against a standard. So far
# just context manipulation:
for my $case
( [ standard => [ ], context => undef, ],
[ Void => [ ':void' ], void => undef, ],
[ Scalar => [ ':scalar' ], scalar => '', ],
[ List => [ ':list' ], list => 1, ],
) {
my ($name, $layer, $context, $wantarray) = @$case;
my $x = 0;
eval sprintf <<'TEST', ($name) x 4 or diag "Error in eval $name: $@";
#line 1 (%s)
BEGIN {
my @L = @$layer; # be nice to perl562
trap { use_ok 'Test::Trap', '$T', $name, @L };
$trap->did_return(" ... importing $name");
$trap->quiet(' ... quietly');
}
() = trap { my $x; () = %s { $x = wantarray }; $x };
if ($context eq 'context') {
$trap->return_is_deeply( [1], ' ... list context propagated' );
$T->wantarray_is( 1, ' ... list context propagated' );
}
else {
$trap->return_is_deeply( [$wantarray], " ... forced $context context" );
$T->wantarray_is( $wantarray, " ... forced $context context" );
}
$T->quiet( " ... with no output in the $name trap" );
$trap->quiet( " ... and no output from the $name trap itself" );
() = trap { my $x; scalar %s { $x = wantarray }; $x };
if ($context eq 'context') {
$trap->return_is_deeply( [''], ' ... scalar context propagated' );
$T->wantarray_is( '', ' ... scalar context propagated' );
}
else {
$trap->return_is_deeply( [$wantarray], " ... forced $context context" );
$T->wantarray_is( $wantarray, " ... forced $context context" );
}
$T->quiet( " ... with no output in the $name trap" );
$trap->quiet( " ... and no output from the $name trap itself" );
() = trap { my $x; %s { $x = wantarray }; $x };
if ($context eq 'context') {
$trap->return_is_deeply( [undef], ' ... void context propagated' );
$T->wantarray_is( undef, ' ... void context propagated' );
}
else {
$trap->return_is_deeply( [$wantarray], " ... forced $context context" );
$T->wantarray_is( $wantarray, " ... forced $context context" );
}
$T->quiet( " ... with no output in the $name trap" );
$trap->quiet( " ... and no output from the $name trap itself" );
1;
TEST
}
# The exceptions -- different layers that are supposed to raise an
# internal exception are added (in two copies!) to a default setup.
# Exceptions may be raised in the application of the layer, in the
# teardown, or both. Exceptions in the application of the layer are
# immediate (and terminate the trap), but exceptions in teardown are
# delayed, and any number of teardown actions can raise an exception.
for my $case
( [ exception1 => sub { die "going down\n" },
qr{^Rethrowing internal exception: going down\n at \(exception1\) line 7\.?\n\z},
0, '(in layer, so user code not run)',
],
[ exception2 => sub { my $self = shift; $self->Teardown(sub { die "going up\n" } ); $self->Next },
qr{^Rethrowing teardown exception: going up\n\nRethrowing teardown exception: going up\n at \(exception2\) line 7\.?\n\z},
1, '(in teardown, so user code has been run)',
],
[ exception3 => sub { my $self = shift; $self->Teardown(sub { die "going up\n" } ); die "going down\n" },
qr{^Rethrowing internal exception: going down\n\nRethrowing teardown exception: going up\n at \(exception3\) line 7\.?\n\z},
0, '(in layer, so user code has not run)',
],
) {
my ($name, $layer, $exception, $value, $test_name) = @$case;
my $x = 0;
eval sprintf <<'TEST', ($name) x 2, ( $value ? (teardown => 'run') : (layer => 'not run') ) or diag "Error in eval $name: $@";
#line 1 (%s)
BEGIN {
my $L = $layer; # be nice to perl562
trap { use_ok 'Test::Trap', '$T', $name, $L, $L };
$trap->did_return(" ... importing $name");
$trap->quiet(' ... quietly');
}
trap { %s { ++$x } };
$trap->die_like( $exception, ' ... internal exceptions caught and rethrown' );
is( $x, $value, ' ... in %s, so user code %s' );
$trap->quiet;
1;
TEST
}
# Test the new :output() layer:
for my $case # layers backendlist useable
( [ Tempfile => [ ':output(tempfile)' ], '"tempfile"', 1 ],
[ Perlio => [ ':output(perlio)' ], '"perlio"', !!eval q{ use PerlIO 'scalar'; 1 } ],
[ Mixed => [ ':output(nosuch;perlio)' ], '("nosuch", "perlio")', !!eval q{ use PerlIO 'scalar'; 1 } ],
[ Badout => [ ':output(nosuch)' ], '"nosuch"', 0 ],
) {
my ($name, $layer, $backendlist, $usable) = @$case;
eval sprintf <<'TEST', ($name) x 2 or diag "Error in $name eval: $@";
#line 1 (%s)
BEGIN {
my @L = @$layer; # be nice to perl562
trap { use_ok 'Test::Trap', '$T', $name, @L };
$trap->did_return(" ... importing $name");
$trap->quiet(' ... quietly');
}
() = trap { %s { print "foo" }; $T->stdout };
if ($usable) {
$trap->return_is_deeply( ['foo'], "Trapped the STDOUT with $name" );
}
else {
$trap->die_like( qr/^No output layer implementation found for \Q$backendlist/, "Died with $name" );
}
$trap->warn_is_deeply( [], 'No warnings' );
1;
TEST
$@ and die "Got $@";
}
# Need some setup to test missing STDOUT/STDERR trapping layer:
STDOUT: {
close STDOUT;
my ($outfh, $outname) = tempfile( UNLINK => 1 );
open STDOUT, '>', $outname;
STDOUT->autoflush(1);
print STDOUT '';
sub stdout () { local $/; local *OUT; open OUT, '<', $outname or die; <OUT> }
END { close STDOUT; close $outfh }
}
STDERR: {
close STDERR;
my ($errfh, $errname) = tempfile( UNLINK => 1 );
open STDERR, '>', $errname;
STDERR->autoflush(1);
print STDERR '';
sub stderr () { local $/; local *ERR; open ERR, '<', $errname or die; <ERR> }
END { close STDERR; close $errfh }
}
# More setup, to deal with the "special" argv-messing layer:
local @ARGV; # in case some harness wants to mess with it ...
my @argv = ('A');
my $special = sub {
my $self = shift;
local *ARGV = \@argv;
$self->{inargv} = [@argv];
$self->Next;
$self->{outargv} = [@argv];
};
# And then we apply varying combinations of layers, to test what is
# trapped and what isn't:
for my $case
( [ default => [ ':default' ], qw( stdout stderr warn ) ],
[ raw => [ ':flow' ], qw( ) ],
[ mixed => [ ':raw:warn:stderr:stdout:exit:die'], qw( stdout stderr warn ) ],
[ special => [ ':default', $special ], qw( stdout stderr warn argv )],
[ warntrap => [ ':flow:warn' ], qw( warn ) ],
) {
my ($name, $layer, @active) = @$case;
my %t = map { $_ => 1 } @active;
my @a = @ARGV;
my @a2 = @argv;
my $out = stdout;
my $err = stderr;
eval sprintf <<'TEST', ($name) x 2 or diag "Error in eval $name: $@";
#line 1 (%s)
BEGIN {
my @L = @$layer; # be nice to perl562
trap { use_ok 'Test::Trap', '$T', $name, @L };
$trap->did_return(" ... importing $name");
$trap->quiet(' ... quietly');
}
%s { print 'Hello'; warn "Hi!\n"; push @ARGV, $name; exit 1 };
is( $T->exit, 1, "&$name traps exit code 1" );
if ($t{stdout}) {
is( $T->stdout, 'Hello', ' ... the stdout' );
is( stdout, $out, ' (preventing output on the previous STDOUT)' );
}
else {
is( $T->stdout, undef, ' ... no stdout' );
is( stdout, $out . 'Hello', ' (leaving the output going to the previous STDOUT)' );
}
if ($t{stderr}) {
is( $T->stderr, "Hi!\n", ' ... the stderr' );
is( stderr, $err, ' (preventing output on the previous STDERR)' );
}
else {
is( $T->stderr, undef, ' ... no stderr' );
is( stderr, $err . "Hi!\n", ' (leaving the output going to the previous STDERR)' );
}
&is_deeply( scalar $T->warn,
$t{warn} ? ( ["Hi!\n"], ' ... the warnings' )
: ( undef, ' ... no warnings' ),
);
if ($t{argv}) {
is_deeply( $T->{inargv}, \@a2, ' ... the in-@ARGV' );
is_deeply( $T->{outargv}, [@a2, $name], ' ... the out-@ARGV' );
is_deeply( \@ARGV, \@a, ' (keeping the real @ARGV unchanged)' );
is_deeply( \@argv, [@a2, $name], ' (instead modifying the lexical @argv)' );
}
else {
is_deeply( $T->{inargv}, undef, ' ... no in-@ARGV' );
is_deeply( $T->{outargv}, undef, ' ... no out-@ARGV' );
is_deeply( \@ARGV, [@a, $name], ' (so not preventing the modification of the real @ARGV)' );
is_deeply( \@argv, \@a2, ' (leaving the lexical @argv unchanged)' );
}
1;
TEST
}
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