/test/lib/numeric/number/test_number39.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_NUMBER39
 5   -- tests on "factorial"
 6
 7insert
 8   EIFFELTEST_TOOLS
 9   NUMBER_TOOLS
10
11create {}
12   make
13
14feature {ANY}
15   make
16      local
17         n1, n2, n3: NUMBER
18      do
19         n1 := from_integer(0)
20         assert(n1.factorial @= 1)
21         n1 := from_integer(1)
22         assert(n1.factorial @= 1)
23         n1 := from_integer(10)
24         n2 := from_string("3628800")
25         assert(n1.factorial.is_equal(n2))
26         -- warning : very slow
27         n1 := from_integer(1000) --from_integer(Maximum_integer) ;
28         n1 := n1 @+ 1
29         n1 := n1.factorial
30         n2 := from_integer(1000) --from_integer(Maximum_integer);
31         n2 := n2.factorial
32         n3 := from_integer(1000) --from_integer(Maximum_integer);
33         n3 := n3 @+ 1
34         n2 := n2 * n3
35         assert(n2.is_equal(n1))
36      end
37
38
39
40end -- class TEST_NUMBER39
41--
42-- ------------------------------------------------------------------------------------------------------------------------------
43-- Copyright notice below. Please read.
44--
45-- SmartEiffel is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License,
46-- as published by the Free Software Foundation; either version 2, or (at your option) any later version.
47-- SmartEiffel is distributed in the hope that it will be useful but WITHOUT ANY WARRANTY; without even the implied warranty
48-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have
49-- received a copy of the GNU General Public License along with SmartEiffel; see the file COPYING. If not, write to the Free
50-- Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
51--
52-- Copyright(C) 1994-2002: INRIA - LORIA (INRIA Lorraine) - ESIAL U.H.P.       - University of Nancy 1 - FRANCE
53-- Copyright(C) 2003-2006: INRIA - LORIA (INRIA Lorraine) - I.U.T. Charlemagne - University of Nancy 2 - FRANCE
54--
55-- Authors: Dominique COLNET, Philippe RIBET, Cyril ADRIAN, Vincent CROIZIER, Frederic MERIZEN
56--
57-- http://SmartEiffel.loria.fr - SmartEiffel@loria.fr
58-- ------------------------------------------------------------------------------------------------------------------------------