Mercurial > hg
annotate contrib/bdiff-torture.py @ 39611:f3900f4c63d4
py3: prevent the win32 ctype _fields_ from being transformed to bytes
Otherwise, any hg invocation dies with
TypeError: '_fields_' must be a sequence of (name, C type) pairs
# skip-blame just a r prefix
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Thu, 13 Sep 2018 00:42:25 -0400 |
parents | 0c73634d0570 |
children | 876494fd967d |
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1 # Randomized torture test generation for bdiff |
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2 |
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3 from __future__ import absolute_import, print_function |
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4 import random |
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5 import sys |
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6 |
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7 from mercurial import ( |
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8 mdiff, |
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9 ) |
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10 |
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11 def reducetest(a, b): |
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12 tries = 0 |
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13 reductions = 0 |
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14 print("reducing...") |
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15 while tries < 1000: |
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16 a2 = "\n".join(l for l in a.splitlines() |
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17 if random.randint(0, 100) > 0) + "\n" |
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18 b2 = "\n".join(l for l in b.splitlines() |
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19 if random.randint(0, 100) > 0) + "\n" |
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20 if a2 == a and b2 == b: |
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21 continue |
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22 if a2 == b2: |
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23 continue |
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24 tries += 1 |
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25 |
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26 try: |
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27 test1(a, b) |
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28 except Exception as inst: |
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29 reductions += 1 |
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30 tries = 0 |
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31 a = a2 |
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32 b = b2 |
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33 |
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34 print("reduced:", reductions, len(a) + len(b), |
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35 repr(a), repr(b)) |
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36 try: |
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37 test1(a, b) |
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38 except Exception as inst: |
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39 print("failed:", inst) |
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40 |
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41 sys.exit(0) |
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42 |
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43 def test1(a, b): |
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44 d = mdiff.textdiff(a, b) |
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45 if not d: |
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46 raise ValueError("empty") |
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47 c = mdiff.patches(a, [d]) |
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48 if c != b: |
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49 raise ValueError("bad") |
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50 |
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51 def testwrap(a, b): |
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52 try: |
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53 test1(a, b) |
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54 return |
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55 except Exception as inst: |
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56 pass |
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57 print("exception:", inst) |
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58 reducetest(a, b) |
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59 |
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60 def test(a, b): |
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61 testwrap(a, b) |
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62 testwrap(b, a) |
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63 |
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64 def rndtest(size, noise): |
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65 a = [] |
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66 src = " aaaaaaaabbbbccd" |
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67 for x in xrange(size): |
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68 a.append(src[random.randint(0, len(src) - 1)]) |
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69 |
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70 while True: |
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71 b = [c for c in a if random.randint(0, 99) > noise] |
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72 b2 = [] |
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73 for c in b: |
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74 b2.append(c) |
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75 while random.randint(0, 99) < noise: |
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76 b2.append(src[random.randint(0, len(src) - 1)]) |
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77 if b2 != a: |
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78 break |
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79 |
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80 a = "\n".join(a) + "\n" |
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81 b = "\n".join(b2) + "\n" |
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82 |
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83 test(a, b) |
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84 |
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85 maxvol = 10000 |
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86 startsize = 2 |
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87 while True: |
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88 size = startsize |
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89 count = 0 |
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90 while size < maxvol: |
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91 print(size) |
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92 volume = 0 |
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93 while volume < maxvol: |
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94 rndtest(size, 2) |
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95 volume += size |
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96 count += 2 |
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97 size *= 2 |
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98 maxvol *= 4 |
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99 startsize *= 4 |