/test/lib/numeric/number/test_number09.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_NUMBER09
 5   -- some strange examples of calculations between numbers
 6   -- properties of additions, multiplications...
 7
 8insert
 9   EIFFELTEST_TOOLS
10   NUMBER_TOOLS
11
12create {}
13   make
14
15feature {ANY}
16   make
17      local
18         n1, n2, n3, n4: NUMBER
19      do
20         -- SMALL_INTEGER
21         n1 := from_integer(10)
22         n2 := from_integer(2)
23         n3 := from_integer(-1)
24         n4 := from_integer(11)
25         -- between numbers...
26         assert((n1 + n2 + n3 + n4).is_equal(n4 * n2))
27         assert((n1 - n2 - n3 - n4).is_equal(n3 * n2))
28         assert((n1 / n2 * (n3 + n4)).is_equal((n3 + n4) * n1 / n2))
29         -- between numbers and integers...
30         assert((n1 * n2 * n3 * n4) @= -220)
31         assert((n1 / n2 / n3) @= -5)
32         assert((n1 * (n3 + n4)) @= 100)
33         assert((n1 * (n3 + n4) * n2) @= 200)
34         assert((n1 / n2 * (n3 + n4)) @= 50)
35         -- if this go on, then all must go on :)
36         assert((n1 / n2 * (n1 * n2) / ((n3 + n4) * ((n1 + n3 - n3) * (n2 / n2)))) @= 1)
37         -- (5 * 20) / (10 * 10)
38         -- LARGE_POSITIVE_INTEGER
39         --...
40         -- LARGE_NEGATIVE_INTEGER
41         --...
42      end
43
44
45
46end -- class TEST_NUMBER09
47--
48-- ------------------------------------------------------------------------------------------------------------------------------
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57--
58-- Copyright(C) 1994-2002: INRIA - LORIA (INRIA Lorraine) - ESIAL U.H.P.       - University of Nancy 1 - FRANCE
59-- Copyright(C) 2003-2006: INRIA - LORIA (INRIA Lorraine) - I.U.T. Charlemagne - University of Nancy 2 - FRANCE
60--
61-- Authors: Dominique COLNET, Philippe RIBET, Cyril ADRIAN, Vincent CROIZIER, Frederic MERIZEN
62--
63-- http://SmartEiffel.loria.fr - SmartEiffel@loria.fr
64-- ------------------------------------------------------------------------------------------------------------------------------