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package Test::Builder;
use 5.006;
use strict;
use warnings;
our $VERSION = '1.302135';
BEGIN {
if( $] < 5.008 ) {
require Test::Builder::IO::Scalar;
}
}
use Scalar::Util qw/blessed reftype weaken/;
use Test2::Util qw/USE_THREADS try get_tid/;
use Test2::API qw/context release/;
# Make Test::Builder thread-safe for ithreads.
BEGIN {
warn "Test::Builder was loaded after Test2 initialization, this is not recommended."
if Test2::API::test2_init_done() || Test2::API::test2_load_done();
if (USE_THREADS && ! Test2::API::test2_ipc_disabled()) {
require Test2::IPC;
require Test2::IPC::Driver::Files;
Test2::IPC::Driver::Files->import;
Test2::API::test2_ipc_enable_polling();
Test2::API::test2_no_wait(1);
Test2::API::test2_ipc_enable_shm();
}
}
use Test2::Event::Subtest;
use Test2::Hub::Subtest;
use Test::Builder::Formatter;
use Test::Builder::TodoDiag;
our $Level = 1;
our $Test = $ENV{TB_NO_EARLY_INIT} ? undef : Test::Builder->new;
sub _add_ts_hooks {
my $self = shift;
my $hub = $self->{Stack}->top;
# Take a reference to the hash key, we do this to avoid closing over $self
# which is the singleton. We use a reference because the value could change
# in rare cases.
my $epkgr = \$self->{Exported_To};
#$hub->add_context_aquire(sub {$_[0]->{level} += $Level - 1});
$hub->pre_filter(sub {
my ($active_hub, $e) = @_;
my $epkg = $$epkgr;
my $cpkg = $e->{trace} ? $e->{trace}->{frame}->[0] : undef;
no strict 'refs';
no warnings 'once';
my $todo;
$todo = ${"$cpkg\::TODO"} if $cpkg;
$todo = ${"$epkg\::TODO"} if $epkg && !$todo;
return $e unless $todo;
# Turn a diag into a todo diag
return Test::Builder::TodoDiag->new(%$e) if ref($e) eq 'Test2::Event::Diag';
if ($active_hub == $hub) {
$e->set_todo($todo) if $e->can('set_todo');
$e->add_amnesty({tag => 'TODO', details => $todo});
}
else {
$e->add_amnesty({tag => 'TODO', details => $todo, inherited => 1});
}
# Set todo on ok's
if ($e->isa('Test2::Event::Ok')) {
$e->set_effective_pass(1);
if (my $result = $e->get_meta(__PACKAGE__)) {
$result->{reason} ||= $todo;
$result->{type} ||= 'todo';
$result->{ok} = 1;
}
}
return $e;
}, inherit => 1);
}
{
no warnings;
INIT {
use warnings;
Test2::API::test2_load() unless Test2::API::test2_in_preload();
}
}
sub new {
my($class) = shift;
unless($Test) {
$Test = $class->create(singleton => 1);
Test2::API::test2_add_callback_post_load(
sub {
$Test->{Original_Pid} = $$ if !$Test->{Original_Pid} || $Test->{Original_Pid} == 0;
$Test->reset(singleton => 1);
$Test->_add_ts_hooks;
}
);
# Non-TB tools normally expect 0 added to the level. $Level is normally 1. So
# we only want the level to change if $Level != 1.
# TB->ctx compensates for this later.
Test2::API::test2_add_callback_context_aquire(sub { $_[0]->{level} += $Level - 1 });
Test2::API::test2_add_callback_exit(sub { $Test->_ending(@_) });
Test2::API::test2_ipc()->set_no_fatal(1) if Test2::API::test2_has_ipc();
}
return $Test;
}
sub create {
my $class = shift;
my %params = @_;
my $self = bless {}, $class;
if ($params{singleton}) {
$self->{Stack} = Test2::API::test2_stack();
}
else {
$self->{Stack} = Test2::API::Stack->new;
$self->{Stack}->new_hub(
formatter => Test::Builder::Formatter->new,
ipc => Test2::API::test2_ipc(),
);
$self->reset(%params);
$self->_add_ts_hooks;
}
return $self;
}
sub ctx {
my $self = shift;
context(
# 1 for our frame, another for the -1 off of $Level in our hook at the top.
level => 2,
fudge => 1,
stack => $self->{Stack},
hub => $self->{Hub},
wrapped => 1,
@_
);
}
sub parent {
my $self = shift;
my $ctx = $self->ctx;
my $chub = $self->{Hub} || $ctx->hub;
$ctx->release;
my $meta = $chub->meta(__PACKAGE__, {});
my $parent = $meta->{parent};
return undef unless $parent;
return bless {
Original_Pid => $$,
Stack => $self->{Stack},
Hub => $parent,
}, blessed($self);
}
sub child {
my( $self, $name ) = @_;
$name ||= "Child of " . $self->name;
my $ctx = $self->ctx;
my $parent = $ctx->hub;
my $pmeta = $parent->meta(__PACKAGE__, {});
$self->croak("You already have a child named ($pmeta->{child}) running")
if $pmeta->{child};
$pmeta->{child} = $name;
# Clear $TODO for the child.
my $orig_TODO = $self->find_TODO(undef, 1, undef);
my $subevents = [];
my $hub = $ctx->stack->new_hub(
class => 'Test2::Hub::Subtest',
);
$hub->pre_filter(sub {
my ($active_hub, $e) = @_;
# Turn a diag into a todo diag
return Test::Builder::TodoDiag->new(%$e) if ref($e) eq 'Test2::Event::Diag';
return $e;
}, inherit => 1) if $orig_TODO;
$hub->listen(sub { push @$subevents => $_[1] });
$hub->set_nested( $parent->nested + 1 );
my $meta = $hub->meta(__PACKAGE__, {});
$meta->{Name} = $name;
$meta->{TODO} = $orig_TODO;
$meta->{TODO_PKG} = $ctx->trace->package;
$meta->{parent} = $parent;
$meta->{Test_Results} = [];
$meta->{subevents} = $subevents;
$meta->{subtest_id} = $hub->id;
$meta->{subtest_uuid} = $hub->uuid;
$meta->{subtest_buffered} = $parent->format ? 0 : 1;
$self->_add_ts_hooks;
$ctx->release;
return bless { Original_Pid => $$, Stack => $self->{Stack}, Hub => $hub, no_log_results => $self->{no_log_results} }, blessed($self);
}
sub finalize {
my $self = shift;
my $ok = 1;
($ok) = @_ if @_;
my $st_ctx = $self->ctx;
my $chub = $self->{Hub} || return $st_ctx->release;
my $meta = $chub->meta(__PACKAGE__, {});
if ($meta->{child}) {
$self->croak("Can't call finalize() with child ($meta->{child}) active");
}
local $? = 0; # don't fail if $subtests happened to set $? nonzero
$self->{Stack}->pop($chub);
$self->find_TODO($meta->{TODO_PKG}, 1, $meta->{TODO});
my $parent = $self->parent;
my $ctx = $parent->ctx;
my $trace = $ctx->trace;
delete $ctx->hub->meta(__PACKAGE__, {})->{child};
$chub->finalize($trace->snapshot(hid => $chub->hid, nested => $chub->nested), 1)
if $ok
&& $chub->count
&& !$chub->no_ending
&& !$chub->ended;
my $plan = $chub->plan || 0;
my $count = $chub->count;
my $failed = $chub->failed;
my $passed = $chub->is_passing;
my $num_extra = $plan =~ m/\D/ ? 0 : $count - $plan;
if ($count && $num_extra != 0) {
my $s = $plan == 1 ? '' : 's';
$st_ctx->diag(<<"FAIL");
Looks like you planned $plan test$s but ran $count.
FAIL
}
if ($failed) {
my $s = $failed == 1 ? '' : 's';
my $qualifier = $num_extra == 0 ? '' : ' run';
$st_ctx->diag(<<"FAIL");
Looks like you failed $failed test$s of $count$qualifier.
FAIL
}
if (!$passed && !$failed && $count && !$num_extra) {
$st_ctx->diag(<<"FAIL");
All assertions inside the subtest passed, but errors were encountered.
FAIL
}
$st_ctx->release;
unless ($chub->bailed_out) {
my $plan = $chub->plan;
if ( $plan && $plan eq 'SKIP' ) {
$parent->skip($chub->skip_reason, $meta->{Name});
}
elsif ( !$chub->count ) {
$parent->ok( 0, sprintf q[No tests run for subtest "%s"], $meta->{Name} );
}
else {
$parent->{subevents} = $meta->{subevents};
$parent->{subtest_id} = $meta->{subtest_id};
$parent->{subtest_uuid} = $meta->{subtest_uuid};
$parent->{subtest_buffered} = $meta->{subtest_buffered};
$parent->ok( $chub->is_passing, $meta->{Name} );
}
}
$ctx->release;
return $chub->is_passing;
}
sub subtest {
my $self = shift;
my ($name, $code, @args) = @_;
my $ctx = $self->ctx;
$ctx->throw("subtest()'s second argument must be a code ref")
unless $code && reftype($code) eq 'CODE';
$name ||= "Child of " . $self->name;
$_->($name,$code,@args)
for Test2::API::test2_list_pre_subtest_callbacks();
$ctx->note("Subtest: $name");
my $child = $self->child($name);
my $start_pid = $$;
my $st_ctx;
my ($ok, $err, $finished, $child_error);
T2_SUBTEST_WRAPPER: {
my $ctx = $self->ctx;
$st_ctx = $ctx->snapshot;
$ctx->release;
$ok = eval { local $Level = 1; $code->(@args); 1 };
($err, $child_error) = ($@, $?);
# They might have done 'BEGIN { skip_all => "whatever" }'
if (!$ok && $err =~ m/Label not found for "last T2_SUBTEST_WRAPPER"/ || (blessed($err) && blessed($err) eq 'Test::Builder::Exception')) {
$ok = undef;
$err = undef;
}
else {
$finished = 1;
}
}
if ($start_pid != $$ && !$INC{'Test2/IPC.pm'}) {
warn $ok ? "Forked inside subtest, but subtest never finished!\n" : $err;
exit 255;
}
my $trace = $ctx->trace;
if (!$finished) {
if(my $bailed = $st_ctx->hub->bailed_out) {
my $chub = $child->{Hub};
$self->{Stack}->pop($chub);
$ctx->bail($bailed->reason);
}
my $code = $st_ctx->hub->exit_code;
$ok = !$code;
$err = "Subtest ended with exit code $code" if $code;
}
my $st_hub = $st_ctx->hub;
my $plan = $st_hub->plan;
my $count = $st_hub->count;
if (!$count && (!defined($plan) || "$plan" ne 'SKIP')) {
$st_ctx->plan(0) unless defined $plan;
$st_ctx->diag('No tests run!');
}
$child->finalize($st_ctx->trace);
$ctx->release;
die $err unless $ok;
$? = $child_error if defined $child_error;
return $st_hub->is_passing;
}
sub name {
my $self = shift;
my $ctx = $self->ctx;
release $ctx, $ctx->hub->meta(__PACKAGE__, {})->{Name};
}
sub reset { ## no critic (Subroutines::ProhibitBuiltinHomonyms)
my ($self, %params) = @_;
Test2::API::test2_set_is_end(0);
# We leave this a global because it has to be localized and localizing
# hash keys is just asking for pain. Also, it was documented.
$Level = 1;
$self->{no_log_results} = $ENV{TEST_NO_LOG_RESULTS} ? 1 : 0
unless $params{singleton};
$self->{Original_Pid} = Test2::API::test2_in_preload() ? -1 : $$;
my $ctx = $self->ctx;
my $hub = $ctx->hub;
$ctx->release;
unless ($params{singleton}) {
$hub->reset_state();
$hub->_tb_reset();
}
$ctx = $self->ctx;
my $meta = $ctx->hub->meta(__PACKAGE__, {});
%$meta = (
Name => $0,
Ending => 0,
Done_Testing => undef,
Skip_All => 0,
Test_Results => [],
parent => $meta->{parent},
);
$self->{Exported_To} = undef unless $params{singleton};
$self->{Orig_Handles} ||= do {
my $format = $ctx->hub->format;
my $out;
if ($format && $format->isa('Test2::Formatter::TAP')) {
$out = $format->handles;
}
$out ? [@$out] : [];
};
$self->use_numbers(1);
$self->no_header(0) unless $params{singleton};
$self->no_ending(0) unless $params{singleton};
$self->reset_outputs;
$ctx->release;
return;
}
my %plan_cmds = (
no_plan => \&no_plan,
skip_all => \&skip_all,
tests => \&_plan_tests,
);
sub plan {
my( $self, $cmd, $arg ) = @_;
return unless $cmd;
my $ctx = $self->ctx;
my $hub = $ctx->hub;
$ctx->throw("You tried to plan twice") if $hub->plan;
local $Level = $Level + 1;
if( my $method = $plan_cmds{$cmd} ) {
local $Level = $Level + 1;
$self->$method($arg);
}
else {
my @args = grep { defined } ( $cmd, $arg );
$ctx->throw("plan() doesn't understand @args");
}
release $ctx, 1;
}
sub _plan_tests {
my($self, $arg) = @_;
my $ctx = $self->ctx;
if($arg) {
local $Level = $Level + 1;
$self->expected_tests($arg);
}
elsif( !defined $arg ) {
$ctx->throw("Got an undefined number of tests");
}
else {
$ctx->throw("You said to run 0 tests");
}
$ctx->release;
}
sub expected_tests {
my $self = shift;
my($max) = @_;
my $ctx = $self->ctx;
if(@_) {
$self->croak("Number of tests must be a positive integer. You gave it '$max'")
unless $max =~ /^\+?\d+$/;
$ctx->plan($max);
}
my $hub = $ctx->hub;
$ctx->release;
my $plan = $hub->plan;
return 0 unless $plan;
return 0 if $plan =~ m/\D/;
return $plan;
}
sub no_plan {
my($self, $arg) = @_;
my $ctx = $self->ctx;
if (defined $ctx->hub->plan) {
warn "Plan already set, no_plan() is a no-op, this will change to a hard failure in the future.";
$ctx->release;
return;
}
$ctx->alert("no_plan takes no arguments") if $arg;
$ctx->hub->plan('NO PLAN');
release $ctx, 1;
}
sub done_testing {
my($self, $num_tests) = @_;
my $ctx = $self->ctx;
my $meta = $ctx->hub->meta(__PACKAGE__, {});
if ($meta->{Done_Testing}) {
my ($file, $line) = @{$meta->{Done_Testing}}[1,2];
local $ctx->hub->{ended}; # OMG This is awful.
$self->ok(0, "done_testing() was already called at $file line $line");
$ctx->release;
return;
}
$meta->{Done_Testing} = [$ctx->trace->call];
my $plan = $ctx->hub->plan;
my $count = $ctx->hub->count;
# If done_testing() specified the number of tests, shut off no_plan
if( defined $num_tests ) {
$ctx->plan($num_tests) if !$plan || $plan eq 'NO PLAN';
}
elsif ($count && defined $num_tests && $count != $num_tests) {
$self->ok(0, "planned to run @{[ $self->expected_tests ]} but done_testing() expects $num_tests");
}
else {
$num_tests = $self->current_test;
}
if( $self->expected_tests && $num_tests != $self->expected_tests ) {
$self->ok(0, "planned to run @{[ $self->expected_tests ]} ".
"but done_testing() expects $num_tests");
}
$ctx->plan($num_tests) if $ctx->hub->plan && $ctx->hub->plan eq 'NO PLAN';
$ctx->hub->finalize($ctx->trace, 1);
release $ctx, 1;
}
sub has_plan {
my $self = shift;
my $ctx = $self->ctx;
my $plan = $ctx->hub->plan;
$ctx->release;
return( $plan ) if $plan && $plan !~ m/\D/;
return('no_plan') if $plan && $plan eq 'NO PLAN';
return(undef);
}
sub skip_all {
my( $self, $reason ) = @_;
my $ctx = $self->ctx;
$ctx->hub->meta(__PACKAGE__, {})->{Skip_All} = $reason || 1;
# Work around old perl bug
if ($] < 5.020000) {
my $begin = 0;
my $level = 0;
while (my @call = caller($level++)) {
last unless @call && $call[0];
next unless $call[3] =~ m/::BEGIN$/;
$begin++;
last;
}
# HACK!
die 'Label not found for "last T2_SUBTEST_WRAPPER"' if $begin && $ctx->hub->meta(__PACKAGE__, {})->{parent};
}
$ctx->plan(0, SKIP => $reason);
}
sub exported_to {
my( $self, $pack ) = @_;
if( defined $pack ) {
$self->{Exported_To} = $pack;
}
return $self->{Exported_To};
}
sub ok {
my( $self, $test, $name ) = @_;
my $ctx = $self->ctx;
# $test might contain an object which we don't want to accidentally
# store, so we turn it into a boolean.
$test = $test ? 1 : 0;
# In case $name is a string overloaded object, force it to stringify.
no warnings qw/uninitialized numeric/;
$name = "$name" if defined $name;
# Profiling showed that the regex here was a huge time waster, doing the
# numeric addition first cuts our profile time from ~300ms to ~50ms
$self->diag(<<" ERR") if 0 + $name && $name =~ /^[\d\s]+$/;
You named your test '$name'. You shouldn't use numbers for your test names.
Very confusing.
ERR
use warnings qw/uninitialized numeric/;
my $trace = $ctx->{trace};
my $hub = $ctx->{hub};
my $result = {
ok => $test,
actual_ok => $test,
reason => '',
type => '',
(name => defined($name) ? $name : ''),
};
$hub->{_meta}->{+__PACKAGE__}->{Test_Results}[ $hub->{count} ] = $result unless $self->{no_log_results};
my $orig_name = $name;
my @attrs;
my $subevents = delete $self->{subevents};
my $subtest_id = delete $self->{subtest_id};
my $subtest_uuid = delete $self->{subtest_uuid};
my $subtest_buffered = delete $self->{subtest_buffered};
my $epkg = 'Test2::Event::Ok';
if ($subevents) {
$epkg = 'Test2::Event::Subtest';
push @attrs => (subevents => $subevents, subtest_id => $subtest_id, subtest_uuid => $subtest_uuid, buffered => $subtest_buffered);
}
my $e = bless {
trace => bless( {%$trace}, 'Test2::EventFacet::Trace'),
pass => $test,
name => $name,
_meta => {'Test::Builder' => $result},
effective_pass => $test,
@attrs,
}, $epkg;
$hub->send($e);
$self->_ok_debug($trace, $orig_name) unless($test);
$ctx->release;
return $test;
}
sub _ok_debug {
my $self = shift;
my ($trace, $orig_name) = @_;
my $is_todo = defined($self->todo);
my $msg = $is_todo ? "Failed (TODO)" : "Failed";
my (undef, $file, $line) = $trace->call;
if (defined $orig_name) {
$self->diag(qq[ $msg test '$orig_name'\n at $file line $line.\n]);
}
else {
$self->diag(qq[ $msg test at $file line $line.\n]);
}
}
sub _diag_fh {
my $self = shift;
local $Level = $Level + 1;
return $self->in_todo ? $self->todo_output : $self->failure_output;
}
sub _unoverload {
my ($self, $type, $thing) = @_;
return unless ref $$thing;
return unless blessed($$thing) || scalar $self->_try(sub{ $$thing->isa('UNIVERSAL') });
{
local ($!, $@);
require overload;
}
my $string_meth = overload::Method( $$thing, $type ) || return;
$$thing = $$thing->$string_meth();
}
sub _unoverload_str {
my $self = shift;
$self->_unoverload( q[""], $_ ) for @_;
}
sub _unoverload_num {
my $self = shift;
$self->_unoverload( '0+', $_ ) for @_;
for my $val (@_) {
next unless $self->_is_dualvar($$val);
$$val = $$val + 0;
}
}
# This is a hack to detect a dualvar such as $!
sub _is_dualvar {
my( $self, $val ) = @_;
# Objects are not dualvars.
return 0 if ref $val;
no warnings 'numeric';
my $numval = $val + 0;
return ($numval != 0 and $numval ne $val ? 1 : 0);
}
sub is_eq {
my( $self, $got, $expect, $name ) = @_;
my $ctx = $self->ctx;
local $Level = $Level + 1;
if( !defined $got || !defined $expect ) {
# undef only matches undef and nothing else
my $test = !defined $got && !defined $expect;
$self->ok( $test, $name );
$self->_is_diag( $got, 'eq', $expect ) unless $test;
$ctx->release;
return $test;
}
release $ctx, $self->cmp_ok( $got, 'eq', $expect, $name );
}
sub is_num {
my( $self, $got, $expect, $name ) = @_;
my $ctx = $self->ctx;
local $Level = $Level + 1;
if( !defined $got || !defined $expect ) {
# undef only matches undef and nothing else
my $test = !defined $got && !defined $expect;
$self->ok( $test, $name );
$self->_is_diag( $got, '==', $expect ) unless $test;
$ctx->release;
return $test;
}
release $ctx, $self->cmp_ok( $got, '==', $expect, $name );
}
sub _diag_fmt {
my( $self, $type, $val ) = @_;
if( defined $$val ) {
if( $type eq 'eq' or $type eq 'ne' ) {
# quote and force string context
$$val = "'$$val'";
}
else {
# force numeric context
$self->_unoverload_num($val);
}
}
else {
$$val = 'undef';
}
return;
}
sub _is_diag {
my( $self, $got, $type, $expect ) = @_;
$self->_diag_fmt( $type, $_ ) for \$got, \$expect;
local $Level = $Level + 1;
return $self->diag(<<"DIAGNOSTIC");
got: $got
expected: $expect
DIAGNOSTIC
}
sub _isnt_diag {
my( $self, $got, $type ) = @_;
$self->_diag_fmt( $type, \$got );
local $Level = $Level + 1;
return $self->diag(<<"DIAGNOSTIC");
got: $got
expected: anything else
DIAGNOSTIC
}
sub isnt_eq {
my( $self, $got, $dont_expect, $name ) = @_;
my $ctx = $self->ctx;
local $Level = $Level + 1;
if( !defined $got || !defined $dont_expect ) {
# undef only matches undef and nothing else
my $test = defined $got || defined $dont_expect;
$self->ok( $test, $name );
$self->_isnt_diag( $got, 'ne' ) unless $test;
$ctx->release;
return $test;
}
release $ctx, $self->cmp_ok( $got, 'ne', $dont_expect, $name );
}
sub isnt_num {
my( $self, $got, $dont_expect, $name ) = @_;
my $ctx = $self->ctx;
local $Level = $Level + 1;
if( !defined $got || !defined $dont_expect ) {
# undef only matches undef and nothing else
my $test = defined $got || defined $dont_expect;
$self->ok( $test, $name );
$self->_isnt_diag( $got, '!=' ) unless $test;
$ctx->release;
return $test;
}
release $ctx, $self->cmp_ok( $got, '!=', $dont_expect, $name );
}
sub like {
my( $self, $thing, $regex, $name ) = @_;
my $ctx = $self->ctx;
local $Level = $Level + 1;
release $ctx, $self->_regex_ok( $thing, $regex, '=~', $name );
}
sub unlike {
my( $self, $thing, $regex, $name ) = @_;
my $ctx = $self->ctx;
local $Level = $Level + 1;
release $ctx, $self->_regex_ok( $thing, $regex, '!~', $name );
}
my %numeric_cmps = map { ( $_, 1 ) } ( "<", "<=", ">", ">=", "==", "!=", "<=>" );
# Bad, these are not comparison operators. Should we include more?
my %cmp_ok_bl = map { ( $_, 1 ) } ( "=", "+=", ".=", "x=", "^=", "|=", "||=", "&&=", "...");
sub cmp_ok {
my( $self, $got, $type, $expect, $name ) = @_;
my $ctx = $self->ctx;
if ($cmp_ok_bl{$type}) {
$ctx->throw("$type is not a valid comparison operator in cmp_ok()");
}
my ($test, $succ);
my $error;
{
## no critic (BuiltinFunctions::ProhibitStringyEval)
local( $@, $!, $SIG{__DIE__} ); # isolate eval
my($pack, $file, $line) = $ctx->trace->call();
# This is so that warnings come out at the caller's level
$succ = eval qq[
#line $line "(eval in cmp_ok) $file"
\$test = (\$got $type \$expect);
1;
];
$error = $@;
}
local $Level = $Level + 1;
my $ok = $self->ok( $test, $name );
# Treat overloaded objects as numbers if we're asked to do a
# numeric comparison.
my $unoverload
= $numeric_cmps{$type}
? '_unoverload_num'
: '_unoverload_str';
$self->diag(<<"END") unless $succ;
An error occurred while using $type:
------------------------------------
$error
------------------------------------
END
unless($ok) {
$self->$unoverload( \$got, \$expect );
if( $type =~ /^(eq|==)$/ ) {
$self->_is_diag( $got, $type, $expect );
}
elsif( $type =~ /^(ne|!=)$/ ) {
no warnings;
my $eq = ($got eq $expect || $got == $expect)
&& (
(defined($got) xor defined($expect))
|| (length($got) != length($expect))
);
use warnings;
if ($eq) {
$self->_cmp_diag( $got, $type, $expect );
}
else {
$self->_isnt_diag( $got, $type );
}
}
else {
$self->_cmp_diag( $got, $type, $expect );
}
}
return release $ctx, $ok;
}
sub _cmp_diag {
my( $self, $got, $type, $expect ) = @_;
$got = defined $got ? "'$got'" : 'undef';
$expect = defined $expect ? "'$expect'" : 'undef';
local $Level = $Level + 1;
return $self->diag(<<"DIAGNOSTIC");
$got
$type
$expect
DIAGNOSTIC
}
sub _caller_context {
my $self = shift;
my( $pack, $file, $line ) = $self->caller(1);
my $code = '';
$code .= "#line $line $file\n" if defined $file and defined $line;
return $code;
}
sub BAIL_OUT {
my( $self, $reason ) = @_;
my $ctx = $self->ctx;
$self->{Bailed_Out} = 1;
$ctx->bail($reason);
}
{
no warnings 'once';
*BAILOUT = \&BAIL_OUT;
}
sub skip {
my( $self, $why, $name ) = @_;
$why ||= '';
$name = '' unless defined $name;
$self->_unoverload_str( \$why );
my $ctx = $self->ctx;
$ctx->hub->meta(__PACKAGE__, {})->{Test_Results}[ $ctx->hub->count ] = {
'ok' => 1,
actual_ok => 1,
name => $name,
type => 'skip',
reason => $why,
} unless $self->{no_log_results};
$name =~ s|#|\\#|g; # # in a name can confuse Test::Harness.
$name =~ s{\n}{\n# }sg;
$why =~ s{\n}{\n# }sg;
my $tctx = $ctx->snapshot;
$tctx->skip('', $why);
return release $ctx, 1;
}
sub todo_skip {
my( $self, $why ) = @_;
$why ||= '';
my $ctx = $self->ctx;
$ctx->hub->meta(__PACKAGE__, {})->{Test_Results}[ $ctx->hub->count ] = {
'ok' => 1,
actual_ok => 0,
name => '',
type => 'todo_skip',
reason => $why,
} unless $self->{no_log_results};
$why =~ s{\n}{\n# }sg;
my $tctx = $ctx->snapshot;
$tctx->send_event( 'Skip', todo => $why, todo_diag => 1, reason => $why, pass => 0);
return release $ctx, 1;
}
sub maybe_regex {
my( $self, $regex ) = @_;
my $usable_regex = undef;
return $usable_regex unless defined $regex;
my( $re, $opts );
# Check for qr/foo/
if( _is_qr($regex) ) {
$usable_regex = $regex;
}
# Check for '/foo/' or 'm,foo,'
elsif(( $re, $opts ) = $regex =~ m{^ /(.*)/ (\w*) $ }sx or
( undef, $re, $opts ) = $regex =~ m,^ m([^\w\s]) (.+) \1 (\w*) $,sx
)
{
$usable_regex = length $opts ? "(?$opts)$re" : $re;
}
return $usable_regex;
}
sub _is_qr {
my $regex = shift;
# is_regexp() checks for regexes in a robust manner, say if they're
# blessed.
return re::is_regexp($regex) if defined &re::is_regexp;
return ref $regex eq 'Regexp';
}
sub _regex_ok {
my( $self, $thing, $regex, $cmp, $name ) = @_;
my $ok = 0;
my $usable_regex = $self->maybe_regex($regex);
unless( defined $usable_regex ) {
local $Level = $Level + 1;
$ok = $self->ok( 0, $name );
$self->diag(" '$regex' doesn't look much like a regex to me.");
return $ok;
}
{
my $test;
my $context = $self->_caller_context;
{
## no critic (BuiltinFunctions::ProhibitStringyEval)
local( $@, $!, $SIG{__DIE__} ); # isolate eval
# No point in issuing an uninit warning, they'll see it in the diagnostics
no warnings 'uninitialized';
$test = eval $context . q{$test = $thing =~ /$usable_regex/ ? 1 : 0};
}
$test = !$test if $cmp eq '!~';
local $Level = $Level + 1;
$ok = $self->ok( $test, $name );
}
unless($ok) {
$thing = defined $thing ? "'$thing'" : 'undef';
my $match = $cmp eq '=~' ? "doesn't match" : "matches";
local $Level = $Level + 1;
$self->diag( sprintf <<'DIAGNOSTIC', $thing, $match, $regex );
%s
%13s '%s'
DIAGNOSTIC
}
return $ok;
}
sub is_fh {
my $self = shift;
my $maybe_fh = shift;
return 0 unless defined $maybe_fh;
return 1 if ref $maybe_fh eq 'GLOB'; # its a glob ref
return 1 if ref \$maybe_fh eq 'GLOB'; # its a glob
return eval { $maybe_fh->isa("IO::Handle") } ||
eval { tied($maybe_fh)->can('TIEHANDLE') };
}
sub level {
my( $self, $level ) = @_;
if( defined $level ) {
$Level = $level;
}
return $Level;
}
sub use_numbers {
my( $self, $use_nums ) = @_;
my $ctx = $self->ctx;
my $format = $ctx->hub->format;
unless ($format && $format->can('no_numbers') && $format->can('set_no_numbers')) {
warn "The current formatter does not support 'use_numbers'" if $format;
return release $ctx, 0;
}
$format->set_no_numbers(!$use_nums) if defined $use_nums;
return release $ctx, $format->no_numbers ? 0 : 1;
}
BEGIN {
for my $method (qw(no_header no_diag)) {
my $set = "set_$method";
my $code = sub {
my( $self, $no ) = @_;
my $ctx = $self->ctx;
my $format = $ctx->hub->format;
unless ($format && $format->can($set)) {
warn "The current formatter does not support '$method'" if $format;
$ctx->release;
return
}
$format->$set($no) if defined $no;
return release $ctx, $format->$method ? 1 : 0;
};
no strict 'refs'; ## no critic
*$method = $code;
}
}
sub no_ending {
my( $self, $no ) = @_;
my $ctx = $self->ctx;
$ctx->hub->set_no_ending($no) if defined $no;
return release $ctx, $ctx->hub->no_ending;
}
sub diag {
my $self = shift;
return unless @_;
my $text = join '' => map {defined($_) ? $_ : 'undef'} @_;
if (Test2::API::test2_in_preload()) {
chomp($text);
$text =~ s/^/# /msg;
print STDERR $text, "\n";
return 0;
}
my $ctx = $self->ctx;
$ctx->diag($text);
$ctx->release;
return 0;
}
sub note {
my $self = shift;
return unless @_;
my $text = join '' => map {defined($_) ? $_ : 'undef'} @_;
if (Test2::API::test2_in_preload()) {
chomp($text);
$text =~ s/^/# /msg;
print STDOUT $text, "\n";
return 0;
}
my $ctx = $self->ctx;
$ctx->note($text);
$ctx->release;
return 0;
}
sub explain {
my $self = shift;
local ($@, $!);
require Data::Dumper;
return map {
ref $_
? do {
my $dumper = Data::Dumper->new( [$_] );
$dumper->Indent(1)->Terse(1);
$dumper->Sortkeys(1) if $dumper->can("Sortkeys");
$dumper->Dump;
}
: $_
} @_;
}
sub output {
my( $self, $fh ) = @_;
my $ctx = $self->ctx;
my $format = $ctx->hub->format;
$ctx->release;
return unless $format && $format->isa('Test2::Formatter::TAP');
$format->handles->[Test2::Formatter::TAP::OUT_STD()] = $self->_new_fh($fh)
if defined $fh;
return $format->handles->[Test2::Formatter::TAP::OUT_STD()];
}
sub failure_output {
my( $self, $fh ) = @_;
my $ctx = $self->ctx;
my $format = $ctx->hub->format;
$ctx->release;
return unless $format && $format->isa('Test2::Formatter::TAP');
$format->handles->[Test2::Formatter::TAP::OUT_ERR()] = $self->_new_fh($fh)
if defined $fh;
return $format->handles->[Test2::Formatter::TAP::OUT_ERR()];
}
sub todo_output {
my( $self, $fh ) = @_;
my $ctx = $self->ctx;
my $format = $ctx->hub->format;
$ctx->release;
return unless $format && $format->isa('Test::Builder::Formatter');
$format->handles->[Test::Builder::Formatter::OUT_TODO()] = $self->_new_fh($fh)
if defined $fh;
return $format->handles->[Test::Builder::Formatter::OUT_TODO()];
}
sub _new_fh {
my $self = shift;
my($file_or_fh) = shift;
my $fh;
if( $self->is_fh($file_or_fh) ) {
$fh = $file_or_fh;
}
elsif( ref $file_or_fh eq 'SCALAR' ) {
# Scalar refs as filehandles was added in 5.8.
if( $] >= 5.008 ) {
open $fh, ">>", $file_or_fh
or $self->croak("Can't open scalar ref $file_or_fh: $!");
}
# Emulate scalar ref filehandles with a tie.
else {
$fh = Test::Builder::IO::Scalar->new($file_or_fh)
or $self->croak("Can't tie scalar ref $file_or_fh");
}
}
else {
open $fh, ">", $file_or_fh
or $self->croak("Can't open test output log $file_or_fh: $!");
_autoflush($fh);
}
return $fh;
}
sub _autoflush {
my($fh) = shift;
my $old_fh = select $fh;
$| = 1;
select $old_fh;
return;
}
sub reset_outputs {
my $self = shift;
my $ctx = $self->ctx;
my $format = $ctx->hub->format;
$ctx->release;
return unless $format && $format->isa('Test2::Formatter::TAP');
$format->set_handles([@{$self->{Orig_Handles}}]) if $self->{Orig_Handles};
return;
}
sub carp {
my $self = shift;
my $ctx = $self->ctx;
$ctx->alert(join "", @_);
$ctx->release;
}
sub croak {
my $self = shift;
my $ctx = $self->ctx;
$ctx->throw(join "", @_);
$ctx->release;
}
sub current_test {
my( $self, $num ) = @_;
my $ctx = $self->ctx;
my $hub = $ctx->hub;
if( defined $num ) {
$hub->set_count($num);
unless ($self->{no_log_results}) {
# If the test counter is being pushed forward fill in the details.
my $test_results = $ctx->hub->meta(__PACKAGE__, {})->{Test_Results};
if ($num > @$test_results) {
my $start = @$test_results ? @$test_results : 0;
for ($start .. $num - 1) {
$test_results->[$_] = {
'ok' => 1,
actual_ok => undef,
reason => 'incrementing test number',
type => 'unknown',
name => undef
};
}
}
# If backward, wipe history. Its their funeral.
elsif ($num < @$test_results) {
$#{$test_results} = $num - 1;
}
}
}
return release $ctx, $hub->count;
}
sub is_passing {
my $self = shift;
my $ctx = $self->ctx;
my $hub = $ctx->hub;
if( @_ ) {
my ($bool) = @_;
$hub->set_failed(0) if $bool;
$hub->is_passing($bool);
}
return release $ctx, $hub->is_passing;
}
sub summary {
my($self) = shift;
return if $self->{no_log_results};
my $ctx = $self->ctx;
my $data = $ctx->hub->meta(__PACKAGE__, {})->{Test_Results};
$ctx->release;
return map { $_ ? $_->{'ok'} : () } @$data;
}
sub details {
my $self = shift;
return if $self->{no_log_results};
my $ctx = $self->ctx;
my $data = $ctx->hub->meta(__PACKAGE__, {})->{Test_Results};
$ctx->release;
return @$data;
}
sub find_TODO {
my( $self, $pack, $set, $new_value ) = @_;
my $ctx = $self->ctx;
$pack ||= $ctx->trace->package || $self->exported_to;
$ctx->release;
return unless $pack;
no strict 'refs'; ## no critic
no warnings 'once';
my $old_value = ${ $pack . '::TODO' };
$set and ${ $pack . '::TODO' } = $new_value;
return $old_value;
}
sub todo {
my( $self, $pack ) = @_;
local $Level = $Level + 1;
my $ctx = $self->ctx;
$ctx->release;
my $meta = $ctx->hub->meta(__PACKAGE__, {todo => []})->{todo};
return $meta->[-1]->[1] if $meta && @$meta;
$pack ||= $ctx->trace->package;
return unless $pack;
no strict 'refs'; ## no critic
no warnings 'once';
return ${ $pack . '::TODO' };
}
sub in_todo {
my $self = shift;
local $Level = $Level + 1;
my $ctx = $self->ctx;
$ctx->release;
my $meta = $ctx->hub->meta(__PACKAGE__, {todo => []})->{todo};
return 1 if $meta && @$meta;
my $pack = $ctx->trace->package || return 0;
no strict 'refs'; ## no critic
no warnings 'once';
my $todo = ${ $pack . '::TODO' };
return 0 unless defined $todo;
return 0 if "$todo" eq '';
return 1;
}
sub todo_start {
my $self = shift;
my $message = @_ ? shift : '';
my $ctx = $self->ctx;
my $hub = $ctx->hub;
my $filter = $hub->pre_filter(sub {
my ($active_hub, $e) = @_;
# Turn a diag into a todo diag
return Test::Builder::TodoDiag->new(%$e) if ref($e) eq 'Test2::Event::Diag';
# Set todo on ok's
if ($hub == $active_hub && $e->isa('Test2::Event::Ok')) {
$e->set_todo($message);
$e->set_effective_pass(1);
if (my $result = $e->get_meta(__PACKAGE__)) {
$result->{reason} ||= $message;
$result->{type} ||= 'todo';
$result->{ok} = 1;
}
}
return $e;
}, inherit => 1);
push @{$ctx->hub->meta(__PACKAGE__, {todo => []})->{todo}} => [$filter, $message];
$ctx->release;
return;
}
sub todo_end {
my $self = shift;
my $ctx = $self->ctx;
my $set = pop @{$ctx->hub->meta(__PACKAGE__, {todo => []})->{todo}};
$ctx->throw('todo_end() called without todo_start()') unless $set;
$ctx->hub->pre_unfilter($set->[0]);
$ctx->release;
return;
}
sub caller { ## no critic (Subroutines::ProhibitBuiltinHomonyms)
my( $self ) = @_;
my $ctx = $self->ctx;
my $trace = $ctx->trace;
$ctx->release;
return wantarray ? $trace->call : $trace->package;
}
sub _try {
my( $self, $code, %opts ) = @_;
my $error;
my $return;
{
local $!; # eval can mess up $!
local $@; # don't set $@ in the test
local $SIG{__DIE__}; # don't trip an outside DIE handler.
$return = eval { $code->() };
$error = $@;
}
die $error if $error and $opts{die_on_fail};
return wantarray ? ( $return, $error ) : $return;
}
sub _ending {
my $self = shift;
my ($ctx, $real_exit_code, $new) = @_;
unless ($ctx) {
my $octx = $self->ctx;
$ctx = $octx->snapshot;
$octx->release;
}
return if $ctx->hub->no_ending;
return if $ctx->hub->meta(__PACKAGE__, {})->{Ending}++;
# Don't bother with an ending if this is a forked copy. Only the parent
# should do the ending.
return unless $self->{Original_Pid} == $$;
my $hub = $ctx->hub;
return if $hub->bailed_out;
my $plan = $hub->plan;
my $count = $hub->count;
my $failed = $hub->failed;
my $passed = $hub->is_passing;
return unless $plan || $count || $failed;
# Ran tests but never declared a plan or hit done_testing
if( !$hub->plan and $hub->count ) {
$self->diag("Tests were run but no plan was declared and done_testing() was not seen.");
if($real_exit_code) {
$self->diag(<<"FAIL");
Looks like your test exited with $real_exit_code just after $count.
FAIL
$$new ||= $real_exit_code;
return;
}
# But if the tests ran, handle exit code.
if($failed > 0) {
my $exit_code = $failed <= 254 ? $failed : 254;
$$new ||= $exit_code;
return;
}
$$new ||= 254;
return;
}
if ($real_exit_code && !$count) {
$self->diag("Looks like your test exited with $real_exit_code before it could output anything.");
$$new ||= $real_exit_code;
return;
}
return if $plan && "$plan" eq 'SKIP';
if (!$count) {
$self->diag('No tests run!');
$$new ||= 255;
return;
}
if ($real_exit_code) {
$self->diag(<<"FAIL");
Looks like your test exited with $real_exit_code just after $count.
FAIL
$$new ||= $real_exit_code;
return;
}
if ($plan eq 'NO PLAN') {
$ctx->plan( $count );
$plan = $hub->plan;
}
# Figure out if we passed or failed and print helpful messages.
my $num_extra = $count - $plan;
if ($num_extra != 0) {
my $s = $plan == 1 ? '' : 's';
$self->diag(<<"FAIL");
Looks like you planned $plan test$s but ran $count.
FAIL
}
if ($failed) {
my $s = $failed == 1 ? '' : 's';
my $qualifier = $num_extra == 0 ? '' : ' run';
$self->diag(<<"FAIL");
Looks like you failed $failed test$s of $count$qualifier.
FAIL
}
if (!$passed && !$failed && $count && !$num_extra) {
$ctx->diag(<<"FAIL");
All assertions passed, but errors were encountered.
FAIL
}
my $exit_code = 0;
if ($failed) {
$exit_code = $failed <= 254 ? $failed : 254;
}
elsif ($num_extra != 0) {
$exit_code = 255;
}
elsif (!$passed) {
$exit_code = 255;
}
$$new ||= $exit_code;
return;
}
# Some things used this even though it was private... I am looking at you
# Test::Builder::Prefix...
sub _print_comment {
my( $self, $fh, @msgs ) = @_;
return if $self->no_diag;
return unless @msgs;
# Prevent printing headers when compiling (i.e. -c)
return if $^C;
# Smash args together like print does.
# Convert undef to 'undef' so its readable.
my $msg = join '', map { defined($_) ? $_ : 'undef' } @msgs;
# Escape the beginning, _print will take care of the rest.
$msg =~ s/^/# /;
local( $\, $", $, ) = ( undef, ' ', '' );
print $fh $msg;
return 0;
}
# This is used by Test::SharedFork to turn on IPC after the fact. Not
# documenting because I do not want it used. The method name is borrowed from
# Test::Builder 2
# Once Test2 stuff goes stable this method will be removed and Test::SharedFork
# will be made smarter.
sub coordinate_forks {
my $self = shift;
{
local ($@, $!);
require Test2::IPC;
}
Test2::IPC->import;
Test2::API::test2_ipc_enable_polling();
Test2::API::test2_load();
my $ipc = Test2::IPC::apply_ipc($self->{Stack});
$ipc->set_no_fatal(1);
Test2::API::test2_no_wait(1);
Test2::API::test2_ipc_enable_shm();
}
sub no_log_results { $_[0]->{no_log_results} = 1 }
1;
__END__
=head1 NAME
Test::Builder - Backend for building test libraries
=head1 SYNOPSIS
package My::Test::Module;
use base 'Test::Builder::Module';
my $CLASS = __PACKAGE__;
sub ok {
my($test, $name) = @_;
my $tb = $CLASS->builder;
$tb->ok($test, $name);
}
=head1 DESCRIPTION
L and L have proven to be popular testing modules,
but they're not always flexible enough. Test::Builder provides a
building block upon which to write your own test libraries I.
=head2 Construction
=over 4
=item B
my $Test = Test::Builder->new;
Returns a Test::Builder object representing the current state of the
test.
Since you only run one test per program C always returns the same
Test::Builder object. No matter how many times you call C, you're
getting the same object. This is called a singleton. This is done so that
multiple modules share such global information as the test counter and
where test output is going.
If you want a completely new Test::Builder object different from the
singleton, use C.
=item B
my $Test = Test::Builder->create;
Ok, so there can be more than one Test::Builder object and this is how
you get it. You might use this instead of C if you're testing
a Test::Builder based module, but otherwise you probably want C.
B: the implementation is not complete. C, for example, is still
shared by B Test::Builder objects, even ones created using this method.
Also, the method name may change in the future.
=item B
$builder->subtest($name, \&subtests, @args);
See documentation of C in Test::More.
C also, and optionally, accepts arguments which will be passed to the
subtests reference.
=item B
diag $builder->name;
Returns the name of the current builder. Top level builders default to C<$0>
(the name of the executable). Child builders are named via the C
method. If no name is supplied, will be named "Child of $parent->name".
=item B
$Test->reset;
Reinitializes the Test::Builder singleton to its original state.
Mostly useful for tests run in persistent environments where the same
test might be run multiple times in the same process.
=back
=head2 Setting up tests
These methods are for setting up tests and declaring how many there
are. You usually only want to call one of these methods.
=over 4
=item B
$Test->plan('no_plan');
$Test->plan( skip_all => $reason );
$Test->plan( tests => $num_tests );
A convenient way to set up your tests. Call this and Test::Builder
will print the appropriate headers and take the appropriate actions.
If you call C, don't call any of the other methods below.
=item B
my $max = $Test->expected_tests;
$Test->expected_tests($max);
Gets/sets the number of tests we expect this test to run and prints out
the appropriate headers.
=item B
$Test->no_plan;
Declares that this test will run an indeterminate number of tests.
=item B
$Test->done_testing();
$Test->done_testing($num_tests);
Declares that you are done testing, no more tests will be run after this point.
If a plan has not yet been output, it will do so.
$num_tests is the number of tests you planned to run. If a numbered
plan was already declared, and if this contradicts, a failing test
will be run to reflect the planning mistake. If C was declared,
this will override.
If C is called twice, the second call will issue a
failing test.
If C<$num_tests> is omitted, the number of tests run will be used, like
no_plan.
C is, in effect, used when you'd want to use C, but
safer. You'd use it like so:
$Test->ok($a == $b);
$Test->done_testing();
Or to plan a variable number of tests:
for my $test (@tests) {
$Test->ok($test);
}
$Test->done_testing(scalar @tests);
=item B
$plan = $Test->has_plan
Find out whether a plan has been defined. C<$plan> is either C (no plan
has been set), C (indeterminate # of tests) or an integer (the number
of expected tests).
=item B
$Test->skip_all;
$Test->skip_all($reason);
Skips all the tests, using the given C<$reason>. Exits immediately with 0.
=item B
my $pack = $Test->exported_to;
$Test->exported_to($pack);
Tells Test::Builder what package you exported your functions to.
This method isn't terribly useful since modules which share the same
Test::Builder object might get exported to different packages and only
the last one will be honored.
=back
=head2 Running tests
These actually run the tests, analogous to the functions in Test::More.
They all return true if the test passed, false if the test failed.
C<$name> is always optional.
=over 4
=item B
$Test->ok($test, $name);
Your basic test. Pass if C<$test> is true, fail if $test is false. Just
like Test::Simple's C.
=item B
$Test->is_eq($got, $expected, $name);
Like Test::More's C. Checks if C<$got eq $expected>. This is the
string version.
C only ever matches another C.
=item B
$Test->is_num($got, $expected, $name);
Like Test::More's C. Checks if C<$got == $expected>. This is the
numeric version.
C only ever matches another C.
=item B
$Test->isnt_eq($got, $dont_expect, $name);
Like L's C. Checks if C<$got ne $dont_expect>. This is
the string version.
=item B
$Test->isnt_num($got, $dont_expect, $name);
Like L's C. Checks if C<$got ne $dont_expect>. This is
the numeric version.
=item B
$Test->like($thing, qr/$regex/, $name);
$Test->like($thing, '/$regex/', $name);
Like L's C. Checks if $thing matches the given C<$regex>.
=item B
$Test->unlike($thing, qr/$regex/, $name);
$Test->unlike($thing, '/$regex/', $name);
Like L's C. Checks if $thing B the
given C<$regex>.
=item B
$Test->cmp_ok($thing, $type, $that, $name);
Works just like L's C.
$Test->cmp_ok($big_num, '!=', $other_big_num);
=back
=head2 Other Testing Methods
These are methods which are used in the course of writing a test but are not themselves tests.
=over 4
=item B
$Test->BAIL_OUT($reason);
Indicates to the L that things are going so badly all
testing should terminate. This includes running any additional test
scripts.
It will exit with 255.
=for deprecated
BAIL_OUT() used to be BAILOUT()
=item B
$Test->skip;
$Test->skip($why);
Skips the current test, reporting C<$why>.
=item B
$Test->todo_skip;
$Test->todo_skip($why);
Like C, only it will declare the test as failing and TODO. Similar
to
print "not ok $tnum # TODO $why\n";
=begin _unimplemented
=item B
$Test->skip_rest;
$Test->skip_rest($reason);
Like C, only it skips all the rest of the tests you plan to run
and terminates the test.
If you're running under C, it skips once and terminates the
test.
=end _unimplemented
=back
=head2 Test building utility methods
These methods are useful when writing your own test methods.
=over 4
=item B
$Test->maybe_regex(qr/$regex/);
$Test->maybe_regex('/$regex/');
This method used to be useful back when Test::Builder worked on Perls
before 5.6 which didn't have qr//. Now its pretty useless.
Convenience method for building testing functions that take regular
expressions as arguments.
Takes a quoted regular expression produced by C, or a string
representing a regular expression.
Returns a Perl value which may be used instead of the corresponding
regular expression, or C if its argument is not recognized.
For example, a version of C, sans the useful diagnostic messages,
could be written as:
sub laconic_like {
my ($self, $thing, $regex, $name) = @_;
my $usable_regex = $self->maybe_regex($regex);
die "expecting regex, found '$regex'\n"
unless $usable_regex;
$self->ok($thing =~ m/$usable_regex/, $name);
}
=item B
my $is_fh = $Test->is_fh($thing);
Determines if the given C<$thing> can be used as a filehandle.
=cut
=back
=head2 Test style
=over 4
=item B
$Test->level($how_high);
How far up the call stack should C<$Test> look when reporting where the
test failed.
Defaults to 1.
Setting C<$Test::Builder::Level> overrides. This is typically useful
localized:
sub my_ok {
my $test = shift;
local $Test::Builder::Level = $Test::Builder::Level + 1;
$TB->ok($test);
}
To be polite to other functions wrapping your own you usually want to increment C<$Level> rather than set it to a constant.
=item B
$Test->use_numbers($on_or_off);
Whether or not the test should output numbers. That is, this if true:
ok 1
ok 2
ok 3
or this if false
ok
ok
ok
Most useful when you can't depend on the test output order, such as
when threads or forking is involved.
Defaults to on.
=item B
$Test->no_diag($no_diag);
If set true no diagnostics will be printed. This includes calls to
C.
=item B
$Test->no_ending($no_ending);
Normally, Test::Builder does some extra diagnostics when the test
ends. It also changes the exit code as described below.
If this is true, none of that will be done.
=item B
$Test->no_header($no_header);
If set to true, no "1..N" header will be printed.
=back
=head2 Output
Controlling where the test output goes.
It's ok for your test to change where STDOUT and STDERR point to,
Test::Builder's default output settings will not be affected.
=over 4
=item B
$Test->diag(@msgs);
Prints out the given C<@msgs>. Like C, arguments are simply
appended together.
Normally, it uses the C handle, but if this is for a
TODO test, the C handle is used.
Output will be indented and marked with a # so as not to interfere
with test output. A newline will be put on the end if there isn't one
already.
We encourage using this rather than calling print directly.
Returns false. Why? Because C is often used in conjunction with
a failing test (C) it "passes through" the failure.
return ok(...) || diag(...);
=for blame transfer
Mark Fowler
=item B
$Test->note(@msgs);
Like C, but it prints to the C handle so it will not
normally be seen by the user except in verbose mode.
=item B
my @dump = $Test->explain(@msgs);
Will dump the contents of any references in a human readable format.
Handy for things like...
is_deeply($have, $want) || diag explain $have;
or
is_deeply($have, $want) || note explain $have;
=item B