diff options
Diffstat (limited to 'test/fiddle/test_c_struct_entry.rb')
-rw-r--r-- | test/fiddle/test_c_struct_entry.rb | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/test/fiddle/test_c_struct_entry.rb b/test/fiddle/test_c_struct_entry.rb new file mode 100644 index 0000000000..43cf28e493 --- /dev/null +++ b/test/fiddle/test_c_struct_entry.rb @@ -0,0 +1,54 @@ +require_relative 'helper' + +require 'fiddle/struct' + +module Fiddle + class TestCStructEntity < TestCase + def test_class_size + types = [TYPE_DOUBLE, TYPE_CHAR] + + size = CStructEntity.size types + + alignments = types.map { |type| PackInfo::ALIGN_MAP[type] } + + expected = PackInfo.align 0, alignments[0] + expected += PackInfo::SIZE_MAP[TYPE_DOUBLE] + + expected = PackInfo.align expected, alignments[1] + expected += PackInfo::SIZE_MAP[TYPE_CHAR] + + expected = PackInfo.align expected, alignments.max + + assert_equal expected, size + end + + def test_class_size_with_count + size = CStructEntity.size([[TYPE_DOUBLE, 2], [TYPE_CHAR, 20]]) + + types = [TYPE_DOUBLE, TYPE_CHAR] + alignments = types.map { |type| PackInfo::ALIGN_MAP[type] } + + expected = PackInfo.align 0, alignments[0] + expected += PackInfo::SIZE_MAP[TYPE_DOUBLE] * 2 + + expected = PackInfo.align expected, alignments[1] + expected += PackInfo::SIZE_MAP[TYPE_CHAR] * 20 + + expected = PackInfo.align expected, alignments.max + + assert_equal expected, size + end + + def test_set_ctypes + union = CStructEntity.malloc [TYPE_INT, TYPE_LONG] + union.assign_names %w[int long] + + # this test is roundabout because the stored ctypes are not accessible + union['long'] = 1 + union['int'] = 2 + + assert_equal 1, union['long'] + assert_equal 2, union['int'] + end + end +end |