/test/language/assertion/test_attribute03.e

 1-- This file is part of SmartEiffel The GNU Eiffel Compiler Tools and Libraries.
 2-- See the Copyright notice at the end of this file.
 3--
 4class TEST_ATTRIBUTE03
 5
 6insert
 7   EIFFELTEST_TOOLS
 8
 9create {}
10   main
11
12feature {ANY}
13   main
14      local
15         aux: AUX_ATTRIBUTE03B; x: INTEGER
16      do
17         set_flags
18         create aux
19         assert(aux.attribute_require_counter = 0)
20         assert(aux.deferred_require_counter = 0)
21         assert(aux.attribute_ensure_counter = 0)
22         assert(aux.deferred_ensure_counter = 0)
23
24         x := aux.value + aux.value
25         -- TODO, Rmk: clarify, what ECMA specifies about contracts 
26         -- of attributes. Why did I once add " + aux.value"? 
27         
28         -- aux.value cannot change between the two successive calls, 
29         -- as no feature with side effects is called in between.
30         -- Therefore the optimizer might choose to evaluate it (and 
31         -- therefore also its contracts) only once.
32         if require_flag then
33            label_assert("precondition evaluated (1 or 2 times)",
34                            aux.attribute_require_counter = 1
35                         or aux.attribute_require_counter = 2)
36            assert(aux.deferred_require_counter = 0)
37         end
38         if ensure_flag then
39            label_assert("postcondition evaluated (1 or 2 times)",
40                            aux.attribute_ensure_counter = 1
41                         or aux.attribute_ensure_counter = 2)
42            label_assert("inherited postcondition evaluated (equal times)",
43                            aux.deferred_ensure_counter = aux.attribute_ensure_counter)
44         end
45      end
46
47   require_flag: BOOLEAN
48
49   ensure_flag: BOOLEAN
50
51   set_flags_require: BOOLEAN
52      do
53         require_flag := True
54         Result := True
55      end
56
57   set_flags
58      require
59         set_flags_require
60      do
61      ensure
62         set_flags_ensure
63      end
64
65   set_flags_ensure: BOOLEAN
66      do
67         ensure_flag := True
68         Result := True
69      end
70
71end -- class TEST_ATTRIBUTE03
72--
73-- ------------------------------------------------------------------------------------------------------------------------------
74-- Copyright notice below. Please read.
75--
76-- SmartEiffel is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License,
77-- as published by the Free Software Foundation; either version 2, or (at your option) any later version.
78-- SmartEiffel is distributed in the hope that it will be useful but WITHOUT ANY WARRANTY; without even the implied warranty
79-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have
80-- received a copy of the GNU General Public License along with SmartEiffel; see the file COPYING. If not, write to the Free
81-- Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
82--
83-- Copyright(C) 1994-2002: INRIA - LORIA (INRIA Lorraine) - ESIAL U.H.P.       - University of Nancy 1 - FRANCE
84-- Copyright(C) 2003-2006: INRIA - LORIA (INRIA Lorraine) - I.U.T. Charlemagne - University of Nancy 2 - FRANCE
85--
86-- Authors: Dominique COLNET, Philippe RIBET, Cyril ADRIAN, Vincent CROIZIER, Frederic MERIZEN
87--
88-- http://SmartEiffel.loria.fr - SmartEiffel@loria.fr
89-- ------------------------------------------------------------------------------------------------------------------------------