[ruby/fiddle] Fix PACK_MAP for unsigned types (https://github.com/ruby/fiddle/pull/110)

https://github.com/ruby/fiddle/commit/4a71246645ccff001292c9d80b855b2ef5bf06c1

1 files changed, 37 insertions, 0 deletions

diff --git a/test/fiddle/test_pack.rb b/test/fiddle/test_pack.rb
new file mode 100644
index 0000000000..ade1dd5040
--- /dev/null
+++ b/test/fiddle/test_pack.rb
@@ -0,0 +1,37 @@
+begin
+  require_relative 'helper'
+  require 'fiddle/pack'
+rescue LoadError
+  return
+end
+
+module Fiddle
+  class TestPack < TestCase
+    def test_pack_map
+      if defined?(TYPE_LONG_LONG)
+        assert_equal [0xffff_ffff_ffff_ffff], [0xffff_ffff_ffff_ffff].pack(PackInfo::PACK_MAP[-TYPE_LONG_LONG]).unpack(PackInfo::PACK_MAP[-TYPE_LONG_LONG])
+      end
+
+      case Fiddle::SIZEOF_VOIDP
+      when 8
+        assert_equal [0xffff_ffff_ffff_ffff], [0xffff_ffff_ffff_ffff].pack(PackInfo::PACK_MAP[TYPE_VOIDP]).unpack(PackInfo::PACK_MAP[TYPE_VOIDP])
+      when 4
+        assert_equal [0xffff_ffff], [0xffff_ffff].pack(PackInfo::PACK_MAP[TYPE_VOIDP]).unpack(PackInfo::PACK_MAP[TYPE_VOIDP])
+      end
+
+      case Fiddle::SIZEOF_LONG
+      when 8
+        assert_equal [0xffff_ffff_ffff_ffff], [0xffff_ffff_ffff_ffff].pack(PackInfo::PACK_MAP[-TYPE_LONG]).unpack(PackInfo::PACK_MAP[-TYPE_LONG])
+      when 4
+        assert_equal [0xffff_ffff], [0xffff_ffff].pack(PackInfo::PACK_MAP[-TYPE_LONG]).unpack(PackInfo::PACK_MAP[-TYPE_LONG])
+      end
+
+      if Fiddle::SIZEOF_INT == 4
+        assert_equal [0xffff_ffff], [0xffff_ffff].pack(PackInfo::PACK_MAP[-TYPE_INT]).unpack(PackInfo::PACK_MAP[-TYPE_INT])
+      end
+
+      assert_equal [0xffff], [0xffff].pack(PackInfo::PACK_MAP[-TYPE_SHORT]).unpack(PackInfo::PACK_MAP[-TYPE_SHORT])
+      assert_equal [0xff], [0xff].pack(PackInfo::PACK_MAP[-TYPE_CHAR]).unpack(PackInfo::PACK_MAP[-TYPE_CHAR])
+    end
+  end
+end