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 def test_aref_pointer_array team = CStructEntity.malloc([[TYPE_VOIDP, 2]]) team.assign_names(["names"]) alice = Fiddle::Pointer.malloc(6) alice[0, 6] = "Alice\0" bob = Fiddle::Pointer.malloc(4) bob[0, 4] = "Bob\0" team["names"] = [alice, bob] assert_equal(["Alice", "Bob"], team["names"].map(&:to_s)) end def test_aref_pointer user = CStructEntity.malloc([TYPE_VOIDP]) user.assign_names(["name"]) alice = Fiddle::Pointer.malloc(6) alice[0, 6] = "Alice\0" user["name"] = alice assert_equal("Alice", user["name"].to_s) end end end