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#!/usr/bin/perl
use v5.18;
use warnings;
use Test2::V0;
use Object::Pad 0.800 ':experimental(adjust_params)';
{
my %captured;
class WithAdjustParams {
ADJUST :params ( :$req, :$opt = "default opt" )
{
$captured{req} = $req;
$captured{opt} = $opt;
}
}
undef %captured;
WithAdjustParams->new( req => "the req", opt => "the opt" );
is( \%captured, { req => "the req", opt => "the opt" }, 'ADJUST :params saw req and opt' );
undef %captured;
WithAdjustParams->new( req => "the req" );
is( \%captured, { req => "the req", opt => "default opt" }, 'ADJUST :params saw req and default opt' );
my $LINE = __LINE__+1;
ok( !defined eval { WithAdjustParams->new(); 1 }, 'Missing required parameter throws exception' );
like( $@, qr/^Required parameter 'req' is missing for WithAdjustParams constructor at \S+ line $LINE\./,
'Exception thrown from constructor with missing parameter' );
}
{
my %captured;
class WithAdjustParamsDefaults {
ADJUST :params ( :$x = "default X", :$y //= "default Y", :$z ||= "default Z" )
{
$captured{x} = $x;
$captured{y} = $y;
$captured{z} = $z;
}
}
undef %captured;
WithAdjustParamsDefaults->new( x => "the X", y => "the Y", z => "the Z" );
is( \%captured, { x => "the X", y => "the Y", z => "the Z" }, 'ADJUST :params saw passed values' );
undef %captured;
WithAdjustParamsDefaults->new();
is( \%captured, { x => "default X", y => "default Y", z => "default Z" },
'ADJUST :params saw defaults when absent' );
undef %captured;
WithAdjustParamsDefaults->new( x => undef, y => undef, z => undef );
is( \%captured, { x => undef, y => "default Y", z => "default Z" },
'ADJUST :params saw x undef but y z defaults when undef' );
undef %captured;
WithAdjustParamsDefaults->new( x => "", y => "", z => "" );
is( \%captured, { x => "", y => "", z => "default Z" },
'ADJUST :params saw x y "" but z defaults when ""' );
}
{
class StrictlyWithParams :strict(params) {
# Check that a trailing comma is permitted
ADJUST :params ( :$param = undef, ) { }
}
ok( defined eval { StrictlyWithParams->new( param => 123 ) }, ':strict(params) is OK' )
or diag( "Exception was: $@" );
ok( !defined eval { StrictlyWithParams->new( more => 2 ) }, ':strict(params) complains about others' );
}
{
my %captured;
class WithRestParams {
ADJUST :params ( :$one = 1, :$two = 2, %params ) {
%captured = %params;
}
}
undef %captured;
WithRestParams->new( one => 111, three => 3 );
is( \%captured, { three => 3 }, 'ADJUST :params rest views remaining params' );
}
{
my %captured;
class StrictlyWithRestParams :strict(params) {
ADJUST :params ( %params ) {
%captured = %params; %params = ();
}
}
StrictlyWithRestParams->new( unknown => "OK" );
is( \%captured, { unknown => "OK" }, 'ADJUST :params rest can consume params' );
}
{
class ExpressionOrder {
field $val;
ADJUST :params (
:$first = undef,
:$second = uc $first,
) {
$val = $second;
}
method val { return $val; }
}
is( ExpressionOrder->new( first => "value" )->val, "VALUE",
'Named param expressions are evaluated in order' );
}
# out-of-block control flow emits warnings
{
my $warnings;
BEGIN { $SIG{__WARN__} = sub { $warnings .= $_[0] }; }
my $WARNLINE;
class ReturnFromAdjust {
$WARNLINE = __LINE__+1;
ADJUST { return; }
}
BEGIN { undef $SIG{__WARN__} }
like( $warnings,
qr/^Using return to leave an ADJUST phaser is discouraged and will be removed in a later version at \S+ line $WARNLINE\./,
'return from ADJUST emits warning' );
}
use Object::Pad ':experimental(composed_adjust)';
# class with composed ADJUST phasers
{
class ComposedAdjust {
field $adjusted;
field $a = "a";
ADJUST { $adjusted .= $a; }
ADJUST { $adjusted .= "b"; }
field $c = "c";
ADJUST { $adjusted .= $c; }
method result { $adjusted }
}
is( ComposedAdjust->new->result, "abc", 'Composed ADJUST phasers still work' );
}
# ADJUST :params can also be composed
{
class ComposedAdjustParams {
field $adjusted;
ADJUST { $adjusted .= "a"; }
ADJUST :params ( :$x ) { $adjusted .= $x; }
ADJUST { $adjusted .= "c"; }
method result { $adjusted }
}
is( ComposedAdjustParams->new( x => "X" )->result, "aXc", 'Composed ADJUST phasers permit :params' );
}
done_testing;
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