Re: overriding builtins quirk

[p5sagit/p5-mst-13.2.git] / t / op / pack.t

diff --git a/t/op/pack.t b/t/op/pack.t
index ca5ab4a..a4c5db0 100755 (executable)
--- a/t/op/pack.t
+++ b/t/op/pack.t
@@ -6,7 +6,7 @@ BEGIN {
     require './test.pl';
 }
 
-plan tests => 5816;
+plan tests => 5826;
 
 use strict;
 use warnings;
@@ -139,6 +139,23 @@ sub list_eq ($$) {
     }
     cmp_ok(unpack ('w',$x), '==', ~0 - 1);
     cmp_ok(unpack ('w',$y), '==', ~0 - 2);
+
+    # These should spot that pack 'w' is using NV, not double, on platforms
+    # where IVs are smaller than doubles, and harmlessly pass elsewhere.
+    # (tests for change 16861)
+    my $x0 = 2**54+3;
+    my $y0 = 2**54-2;
+
+    $x = pack 'w', $x0;
+    $y = pack 'w', $y0;
+
+    if ($x0 == $y0) {
+        is($x, $y, "NV arithmetic");
+    } else {
+        isnt($x, $y, "IV/NV arithmetic");
+    }
+    cmp_ok(unpack ('w',$x), '==', $x0);
+    cmp_ok(unpack ('w',$y), '==', $y0);
 }
 
 
@@ -153,6 +170,44 @@ sub list_eq ($$) {
 
   eval { $x = unpack 'w', pack 'C*', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
   like($@, qr/^Unterminated compressed integer/);
+
+  eval { $x = pack 'w', -1 };
+  like ($@, qr/^Cannot compress negative numbers/);
+
+  eval { $x = pack 'w', '1'x(1 + length ~0) . 'e0' };
+  like ($@, qr/^Can only compress unsigned integers/);
+
+ SKIP: {
+    # Is this a stupid thing to do on VMS, VOS and other unusual platforms?
+    my $inf = eval '2**10000';
+
+    skip "Couldn't generate infinity - got error '$@'"
+      unless defined $inf and $inf == $inf / 2 and $inf + 1 == $inf;
+
+    eval { $x = pack 'w', $inf };
+    like ($@, qr/^Cannot compress integer/);
+  }
+
+ SKIP: {
+    # This should be about the biggest thing possible on an IEEE double
+    my $big = eval '2**1023';
+
+    skip "Couldn't generate 2**1023 - got error '$@'", 3
+      unless defined $big and $big != $big / 2;
+
+    eval { $x = pack 'w', $big };
+    is ($@, '', "Should be able to pack 'w', $big # 2**1023");
+
+    my $y = eval {unpack 'w', $x};
+    is ($@, '',
+       "Should be able to unpack 'w' the result of pack 'w', $big # 2**1023");
+
+    # I'm getting about 1e-16 on FreeBSD
+    my $quotient = int (100 * ($y - $big) / $big);
+    ok($quotient < 2 && $quotient > -2,
+       "Round trip pack, unpack 'w' of $big is withing 1% ($quotient%)");
+  }
+
 }
 
 #
@@ -937,3 +992,6 @@ foreach my $template (qw(A Z c C s S i I l L n N v V q Q j J f d F D u U w)) {
     }
   }
 }
+
+ok(pack('u2', 'AA'), "[perl #8026]"); # used to hang and eat RAM in perl 5.7.2
+