2 // BigIntegerTest.cs - NUnit Test Cases for BigInteger
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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29 using NUnit.Framework;
30 using myalias = System;
33 namespace MonoTests.Mono.Math {
36 public class BigIntegerTest {
39 public void DefaultBitCount ()
41 BigInteger bi = new BigInteger ();
42 Assert.AreEqual (0, bi.BitCount (), "default BitCount");
43 // note: not bit are set so BitCount is zero
47 public void DefaultRandom ()
49 // based on bugzilla entry #68452
50 BigInteger bi = new BigInteger ();
51 Assert.AreEqual (0, bi.BitCount (), "before randomize");
53 // Randomize returns a random number of BitCount length
54 // so in this case it will ALWAYS return 0
55 Assert.AreEqual (0, bi.BitCount (), "after randomize");
56 Assert.AreEqual (new BigInteger (0), bi, "Zero");
60 public void ModPow_0_Even ()
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62 BigInteger x = new BigInteger (1);
63 BigInteger y = new BigInteger (0);
64 BigInteger z = x.ModPow (y, 1024);
65 Assert.AreEqual ("1", z.ToString (), "1 pow 0 == 1");
69 public void ModPow_Big_Even ()
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71 // http://gcc.gnu.org/ml/java/2001-01/msg00150.html
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72 BigInteger x = BigInteger.Parse ("222556259477882361118129720038750144464896096345697329917462180806109470940281821580712930114298080816996240075704780895407778416354633927929850543336844729388676722554712356733107888579404671103423966348754128720372408391573576775380281687780687492527566938517625657849775850241884119610654472761291507970934");
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73 BigInteger y = BigInteger.Parse ("110319153937683287453746757581772092163629769182044007837690319614087550020383807943886070460712008994638849038231331120616035703719955147238394349941968802357224177878230564379014395900786093465543114548034361805469457605783731382574787980771957640613447628351175959168798011343064123908688343944150028709336");
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74 BigInteger z = BigInteger.Parse ("211455809992703561445401788842734346323873054957006050135582190157359001703882707072169880651159563587522668850959539052488297197610540840476872693108381476249027986010074543599432542677282684917897250864056294311624311681558854158430574409491081490219256907243905496547813878640883064959346343865887971384185");
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75 BigInteger a = z.ModPow (x, y);
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76 Assert.AreEqual ("89040229313686098274750802637193802904787850353791629688385431482589769348345172944539658366893587456857347312314974124445695423885005533414559099801699612294235861570065774222911180890417009385455826560773741520297884850460324781620974467560905975577765401911117379967692495136423710471201230243826129276993", a.ToString ());
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80 public void ModPow_2 ()
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83 BigInteger b = new BigInteger (10);
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84 BigInteger m = new BigInteger (32);
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85 // after 40 we start loosing double precision and result will differ
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86 for (int i=1; i < 40; i++) {
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87 BigInteger e = new BigInteger (i);
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88 BigInteger r = e.ModPow (b, m);
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89 long expected = (long) myalias.Math.Pow (i, 10) % 32;
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90 Assert.AreEqual (expected.ToString (), r.ToString (), i.ToString ());
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