1require_relative 'test_base'
2
3require 'dl/struct'
4
5module DL
6  class TestCUnionEntity < TestBase
7    def test_class_size
8      size = CUnionEntity.size([TYPE_DOUBLE, TYPE_CHAR])
9
10      assert_equal SIZEOF_DOUBLE, size
11    end
12
13    def test_class_size_with_count
14      size = CUnionEntity.size([[TYPE_DOUBLE, 2], [TYPE_CHAR, 20]])
15
16      assert_equal SIZEOF_CHAR * 20, size
17    end
18
19    def test_set_ctypes
20      union = CUnionEntity.malloc [TYPE_INT, TYPE_LONG]
21      union.assign_names %w[int long]
22
23      # this test is roundabout because the stored ctypes are not accessible
24      union['long'] = 1
25      assert_equal 1, union['long']
26
27      union['int'] = 1
28      assert_equal 1, union['int']
29    end
30  end
31end
32