pkg/math/test/lcm_test.dart - Issue 541523002: pkg/math: remove placeholder

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Side by Side Diff: pkg/math/test/lcm_test.dart

Issue 541523002: pkg/math: remove placeholder (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart

Patch Set: Created 6 years, 3 months ago

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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file

2 // for details. All rights reserved. Use of this source code is governed by a

3 // BSD-style license that can be found in the LICENSE file.

4

5 library math_test;

6 import "package:expect/expect.dart";

7 import 'dart:math';

8 import 'package:math/math.dart';

9

10 void testLcm() {

11 Expect.equals(0, lcm(0, 7));

12 Expect.equals(0, lcm(5, 0));

13 Expect.equals(0, lcm(-5, 0));

14 Expect.equals(0, lcm(0, 0));

15 Expect.equals(35, lcm(5, 7));

16 Expect.equals(36, lcm(12, 18));

17 Expect.equals(36, lcm(12, -18));

18 Expect.equals(36, lcm(-12, -18));

19 Expect.equals(36, lcm(18, 12));

20 Expect.equals(315, lcm(45, 105));

21

22 Expect.throws(() => lcm(0, null), (e) => e is ArgumentError);

23 Expect.throws(() => lcm(null, 0), (e) => e is ArgumentError);

24

25 // Cover all branches in Binary GCD implementation.

26 // 0 shared powers-of-two factors.

27 Expect.equals(28, lcm(2*2, 7));

28 // 1 shared power-of-two factor.

29 Expect.equals(28, lcm(22, 27));

30 // >1 shared powers-of-two factors.

31 Expect.equals(120, lcm(2223, 2225));

32

33 // 0 remaining powers-of-two in a.

34 Expect.equals(18, lcm(23, 23*3));

35 // 1 remaining power-of-two in a.

36 Expect.equals(36, lcm(223, 233));

37 // >1 remaining powers-of-two in a.

38 Expect.equals(144, lcm(22223, 233));

39

40 // 0 remaining powers-of-two in b.

41 Expect.equals(18, lcm(23, 23*3));

42 // 1 remaining power-of-two in b.

43 Expect.equals(12, lcm(23, 22*3));

44 // >1 remaining powers-of-two in b.

45 Expect.equals(72, lcm(23, 2223*3));

46

47 // Innermost 'if'

48 // a > b.

49 Expect.equals(60, lcm(2235, 23));

50 // a == b.

51 Expect.equals(24, lcm(23, 2223));

52 // a < b.

53 Expect.equals(84, lcm(23, 2237));

54

55 // do while loop executions.

56 // Executed 1 time.

57 Expect.equals(24, lcm(23, 2223));

58 // Executed >1 times.

59 Expect.equals(180, lcm(233, 223*5));

60

61 // Medium int (mint) arguments.

62 Expect.equals(pow(2, 62)3, lcm(pow(2, 61)3, pow(2,62)));

63 // 9079837958533 is the first prime after 2**48 / 31.

64 Expect.equals(31379079837958533,

65 lcm(319079837958533, 379079837958533));

66 }

67

68 main() {

69 testLcm();

70 }

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