X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Fop%2Flocal.t;h=8bfea00b9a4006b5b7fe19f5d58dd0d63b5fe82b;hb=21fa6956243df9cb622bebfa0934ea7923519b4f;hp=3e30306218d1fad77606123309d624fe20e0a1c9;hpb=85aff5773f2412a54180cc35f86370c56b65bf77;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/op/local.t b/t/op/local.t
index 3e30306..8bfea00 100755
--- a/t/op/local.t
+++ b/t/op/local.t
@@ -1,60 +1,464 @@
 #!./perl
 
-# $RCSfile: local.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:04 $
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = qw(. ../lib);
+    require './test.pl';
+}
+plan tests => 122;
+
+my $list_assignment_supported = 1;
+
+#mg.c says list assignment not supported on VMS, EPOC, and SYMBIAN.
+$list_assignment_supported = 0 if ($^O eq 'VMS');
 
-print "1..24\n";
 
 sub foo {
     local($a, $b) = @_;
     local($c, $d);
-    $c = "ok 3\n";
-    $d = "ok 4\n";
-    { local($a,$c) = ("ok 9\n", "ok 10\n"); ($x, $y) = ($a, $c); }
-    print $a, $b;
-    $c . $d;
+    $c = "c 3";
+    $d = "d 4";
+    { local($a,$c) = ("a 9", "c 10"); ($x, $y) = ($a, $c); }
+    is($a, "a 1");
+    is($b, "b 2");
+    $c, $d;
 }
 
-$a = "ok 5\n";
-$b = "ok 6\n";
-$c = "ok 7\n";
-$d = "ok 8\n";
+$a = "a 5";
+$b = "b 6";
+$c = "c 7";
+$d = "d 8";
 
-print &foo("ok 1\n","ok 2\n");
+my @res;
+@res =  &foo("a 1","b 2");
+is($res[0], "c 3");
+is($res[1], "d 4");
 
-print $a,$b,$c,$d,$x,$y;
+is($a, "a 5");
+is($b, "b 6");
+is($c, "c 7");
+is($d, "d 8");
+is($x, "a 9");
+is($y, "c 10");
 
 # same thing, only with arrays and associative arrays
 
 sub foo2 {
     local($a, @b) = @_;
     local(@c, %d);
-    @c = "ok 13\n";
-    $d{''} = "ok 14\n";
-    { local($a,@c) = ("ok 19\n", "ok 20\n"); ($x, $y) = ($a, @c); }
-    print $a, @b;
-    $c[0] . $d{''};
+    @c = "c 3";
+    $d{''} = "d 4";
+    { local($a,@c) = ("a 19", "c 20"); ($x, $y) = ($a, @c); }
+    is($a, "a 1");
+    is("@b", "b 2");
+    $c[0], $d{''};
 }
 
-$a = "ok 15\n";
-@b = "ok 16\n";
-@c = "ok 17\n";
-$d{''} = "ok 18\n";
+$a = "a 5";
+@b = "b 6";
+@c = "c 7";
+$d{''} = "d 8";
 
-print &foo2("ok 11\n","ok 12\n");
+@res = &foo2("a 1","b 2");
+is($res[0], "c 3");
+is($res[1], "d 4");
+
+is($a, "a 5");
+is("@b", "b 6");
+is($c[0], "c 7");
+is($d{''}, "d 8");
+is($x, "a 19");
+is($y, "c 20");
 
-print $a,@b,@c,%d,$x,$y;
 
 eval 'local($$e)';
-print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 21\n";
+like($@, qr/Can't localize through a reference/);
+
+eval '$e = []; local(@$e)';
+like($@, qr/Can't localize through a reference/);
+
+eval '$e = {}; local(%$e)';
+like($@, qr/Can't localize through a reference/);
+
+# Array and hash elements
+
+@a = ('a', 'b', 'c');
+{
+    local($a[1]) = 'foo';
+    local($a[2]) = $a[2];
+    is($a[1], 'foo');
+    is($a[2], 'c');
+    undef @a;
+}
+is($a[1], 'b');
+is($a[2], 'c');
+ok(!defined $a[0]);
 
-eval 'local(@$e)';
-print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 22\n";
+@a = ('a', 'b', 'c');
+{
+    local($a[1]) = "X";
+    shift @a;
+}
+is($a[0].$a[1], "Xb");
+{
+    my $d = "@a";
+    local @a = @a;
+    is("@a", $d);
+}
 
-eval 'local(%$e)';
-print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 23\n";
+%h = ('a' => 1, 'b' => 2, 'c' => 3);
+{
+    local($h{'a'}) = 'foo';
+    local($h{'b'}) = $h{'b'};
+    is($h{'a'}, 'foo');
+    is($h{'b'}, 2);
+    local($h{'c'});
+    delete $h{'c'};
+}
+is($h{'a'}, 1);
+is($h{'b'}, 2);
+{
+    my $d = join("\n", map { "$_=>$h{$_}" } sort keys %h);
+    local %h = %h;
+    is(join("\n", map { "$_=>$h{$_}" } sort keys %h), $d);
+}
+is($h{'c'}, 3);
 
 # check for scope leakage
 $a = 'outer';
 if (1) { local $a = 'inner' }
-print +($a eq 'outer') ? "" : "not ", "ok 24\n";
+is($a, 'outer');
+
+# see if localization works when scope unwinds
+local $m = 5;
+eval {
+    for $m (6) {
+	local $m = 7;
+	die "bye";
+    }
+};
+is($m, 5);
+
+# see if localization works on tied arrays
+{
+    package TA;
+    sub TIEARRAY { bless [], $_[0] }
+    sub STORE { print "# STORE [@_]\n"; $_[0]->[$_[1]] = $_[2] }
+    sub FETCH { my $v = $_[0]->[$_[1]]; print "# FETCH [@_=$v]\n"; $v }
+    sub CLEAR { print "# CLEAR [@_]\n"; @{$_[0]} = (); }
+    sub FETCHSIZE { scalar(@{$_[0]}) }
+    sub SHIFT { shift (@{$_[0]}) }
+    sub EXTEND {}
+}
+
+tie @a, 'TA';
+@a = ('a', 'b', 'c');
+{
+    local($a[1]) = 'foo';
+    local($a[2]) = $a[2];
+    is($a[1], 'foo');
+    is($a[2], 'c');
+    @a = ();
+}
+is($a[1], 'b');
+is($a[2], 'c');
+ok(!defined $a[0]);
+{
+    my $d = "@a";
+    local @a = @a;
+    is("@a", $d);
+}
+
+{
+    package TH;
+    sub TIEHASH { bless {}, $_[0] }
+    sub STORE { print "# STORE [@_]\n"; $_[0]->{$_[1]} = $_[2] }
+    sub FETCH { my $v = $_[0]->{$_[1]}; print "# FETCH [@_=$v]\n"; $v }
+    sub EXISTS { print "# EXISTS [@_]\n"; exists $_[0]->{$_[1]}; }
+    sub DELETE { print "# DELETE [@_]\n"; delete $_[0]->{$_[1]}; }
+    sub CLEAR { print "# CLEAR [@_]\n"; %{$_[0]} = (); }
+    sub FIRSTKEY { print "# FIRSTKEY [@_]\n"; keys %{$_[0]}; each %{$_[0]} }
+    sub NEXTKEY { print "# NEXTKEY [@_]\n"; each %{$_[0]} }
+}
+
+# see if localization works on tied hashes
+tie %h, 'TH';
+%h = ('a' => 1, 'b' => 2, 'c' => 3);
+
+{
+    local($h{'a'}) = 'foo';
+    local($h{'b'}) = $h{'b'};
+    local($h{'y'});
+    local($h{'z'}) = 33;
+    is($h{'a'}, 'foo');
+    is($h{'b'}, 2);
+    local($h{'c'});
+    delete $h{'c'};
+}
+is($h{'a'}, 1);
+is($h{'b'}, 2);
+is($h{'c'}, 3);
+# local() should preserve the existenceness of tied hash elements
+ok(! exists $h{'y'});
+ok(! exists $h{'z'});
+TODO: {
+    todo_skip("Localize entire tied hash");
+    my $d = join("\n", map { "$_=>$h{$_}" } sort keys %h);
+    local %h = %h;
+    is(join("\n", map { "$_=>$h{$_}" } sort keys %h), $d);
+}
+
+@a = ('a', 'b', 'c');
+{
+    local($a[1]) = "X";
+    shift @a;
+}
+is($a[0].$a[1], "Xb");
+
+# now try the same for %SIG
+
+$SIG{TERM} = 'foo';
+$SIG{INT} = \&foo;
+$SIG{__WARN__} = $SIG{INT};
+{
+    local($SIG{TERM}) = $SIG{TERM};
+    local($SIG{INT}) = $SIG{INT};
+    local($SIG{__WARN__}) = $SIG{__WARN__};
+    is($SIG{TERM}, 'main::foo');
+    is($SIG{INT}, \&foo);
+    is($SIG{__WARN__}, \&foo);
+    local($SIG{INT});
+    delete $SIG{__WARN__};
+}
+is($SIG{TERM}, 'main::foo');
+is($SIG{INT}, \&foo);
+is($SIG{__WARN__}, \&foo);
+{
+    my $d = join("\n", map { "$_=>$SIG{$_}" } sort keys %SIG);
+    local %SIG = %SIG;
+    is(join("\n", map { "$_=>$SIG{$_}" } sort keys %SIG), $d);
+}
+
+# and for %ENV
+
+$ENV{_X_} = 'a';
+$ENV{_Y_} = 'b';
+$ENV{_Z_} = 'c';
+{
+    local($ENV{_A_});
+    local($ENV{_B_}) = 'foo';
+    local($ENV{_X_}) = 'foo';
+    local($ENV{_Y_}) = $ENV{_Y_};
+    is($ENV{_X_}, 'foo');
+    is($ENV{_Y_}, 'b');
+    local($ENV{_Z_});
+    delete $ENV{_Z_};
+}
+is($ENV{_X_}, 'a');
+is($ENV{_Y_}, 'b');
+is($ENV{_Z_}, 'c');
+# local() should preserve the existenceness of %ENV elements
+ok(! exists $ENV{_A_});
+ok(! exists $ENV{_B_});
+
+SKIP: {
+    skip("Can't make list assignment to \%ENV on this system")
+	unless $list_assignment_supported;
+    my $d = join("\n", map { "$_=>$ENV{$_}" } sort keys %ENV);
+    local %ENV = %ENV;
+    is(join("\n", map { "$_=>$ENV{$_}" } sort keys %ENV), $d);
+}
+
+# does implicit localization in foreach skip magic?
+
+$_ = "o 0,o 1,";
+my $iter = 0;
+while (/(o.+?),/gc) {
+    is($1, "o $iter");
+    foreach (1..1) { $iter++ }
+    if ($iter > 2) { fail("endless loop"); last; }
+}
+
+{
+    package UnderScore;
+    sub TIESCALAR { bless \my $self, shift }
+    sub FETCH { die "read  \$_ forbidden" }
+    sub STORE { die "write \$_ forbidden" }
+    tie $_, __PACKAGE__;
+    my @tests = (
+	"Nesting"     => sub { print '#'; for (1..3) { print }
+			       print "\n" },			1,
+	"Reading"     => sub { print },				0,
+	"Matching"    => sub { $x = /badness/ },		0,
+	"Concat"      => sub { $_ .= "a" },			0,
+	"Chop"        => sub { chop },				0,
+	"Filetest"    => sub { -x },				0,
+	"Assignment"  => sub { $_ = "Bad" },			0,
+	# XXX whether next one should fail is debatable
+	"Local \$_"   => sub { local $_  = 'ok?'; print },	0,
+	"for local"   => sub { for("#ok?\n"){ print } },	1,
+    );
+    while ( ($name, $code, $ok) = splice(@tests, 0, 3) ) {
+	eval { &$code };
+        main::ok(($ok xor $@), "Underscore '$name'");
+    }
+    untie $_;
+}
+
+{
+    # BUG 20001205.22
+    my %x;
+    $x{a} = 1;
+    { local $x{b} = 1; }
+    ok(! exists $x{b});
+    { local @x{c,d,e}; }
+    ok(! exists $x{c});
+}
+
+# local() and readonly magic variables
+
+eval { local $1 = 1 };
+like($@, qr/Modification of a read-only value attempted/);
+
+eval { for ($1) { local $_ = 1 } };
+like($@, qr/Modification of a read-only value attempted/);
+
+# make sure $1 is still read-only
+eval { for ($1) { local $_ = 1 } };
+like($@, qr/Modification of a read-only value attempted/);
+
+# The s/// adds 'g' magic to $_, but it should remain non-readonly
+eval { for("a") { for $x (1,2) { local $_="b"; s/(.*)/+$1/ } } };
+is($@, "");
+
+# Special local() behavior for $[
+# (see RT #38207 - Useless localization of constant ($[) in getopts.pl}
+{
+    local $[ = 1;
+    local $TODO = "local() not currently working correctly with \$[";
+    ok(1 == $[);
+    undef $TODO;
+    f();
+}
+
+sub f { ok(0 == $[); }
+
+# sub localisation
+{
+	package Other;
+
+	sub f1 { "f1" }
+	sub f2 { "f2" }
+
+	no warnings "redefine";
+	{
+		local *f1 = sub  { "g1" };
+		::ok(f1() eq "g1", "localised sub via glob");
+	}
+	::ok(f1() eq "f1", "localised sub restored");
+	{
+		local $Other::{"f1"} = sub { "h1" };
+		::ok(f1() eq "h1", "localised sub via stash");
+	}
+	::ok(f1() eq "f1", "localised sub restored");
+	{
+		local @Other::{qw/ f1 f2 /} = (sub { "j1" }, sub { "j2" });
+		::ok(f1() eq "j1", "localised sub via stash slice");
+		::ok(f2() eq "j2", "localised sub via stash slice");
+	}
+	::ok(f1() eq "f1", "localised sub restored");
+	::ok(f2() eq "f2", "localised sub restored");
+}
+
+# Localising unicode keys (bug #38815)
+{
+    my %h;
+    $h{"\243"} = "pound";
+    $h{"\302\240"} = "octects";
+    is(scalar keys %h, 2);
+    {
+	my $unicode = chr 256;
+	my $ambigous = "\240" . $unicode;
+	chop $ambigous;
+	local $h{$unicode} = 256;
+	local $h{$ambigous} = 160;
+
+	is(scalar keys %h, 4);
+	is($h{"\243"}, "pound");
+	is($h{$unicode}, 256);
+	is($h{$ambigous}, 160);
+	is($h{"\302\240"}, "octects");
+    }
+    is(scalar keys %h, 2);
+    is($h{"\243"}, "pound");
+    is($h{"\302\240"}, "octects");
+}
+
+# And with slices
+{
+    my %h;
+    $h{"\243"} = "pound";
+    $h{"\302\240"} = "octects";
+    is(scalar keys %h, 2);
+    {
+	my $unicode = chr 256;
+	my $ambigous = "\240" . $unicode;
+	chop $ambigous;
+	local @h{$unicode, $ambigous} = (256, 160);
+
+	is(scalar keys %h, 4);
+	is($h{"\243"}, "pound");
+	is($h{$unicode}, 256);
+	is($h{$ambigous}, 160);
+	is($h{"\302\240"}, "octects");
+    }
+    is(scalar keys %h, 2);
+    is($h{"\243"}, "pound");
+    is($h{"\302\240"}, "octects");
+}
+
+# [perl #39012] localizing @_ element then shifting frees element too # soon
+
+{
+    my $x;
+    my $y = bless [], 'X39012';
+    sub X39012::DESTROY { $x++ }
+    sub { local $_[0]; shift }->($y);
+    ok(!$x,  '[perl #39012]');
+    
+}
+
+# when localising a hash element, the key should be copied, not referenced
+
+{
+    my %h=('k1' => 111);
+    my $k='k1';
+    {
+	local $h{$k}=222;
+
+	is($h{'k1'},222);
+	$k='k2';
+    }
+    ok(! exists($h{'k2'}));
+    is($h{'k1'},111);
+}
+{
+    my %h=('k1' => 111);
+    our $k = 'k1';  # try dynamic too
+    {
+	local $h{$k}=222;
+	is($h{'k1'},222);
+	$k='k2';
+    }
+    ok(! exists($h{'k2'}));
+    is($h{'k1'},111);
+}
+
+# Keep this test last, as it can SEGV
+{
+    local *@;
+    pass("Localised *@");
+    eval {1};
+    pass("Can eval with *@ localised");
+}