diff options
Diffstat (limited to 'factory/fuzzy.py')
| -rw-r--r-- | factory/fuzzy.py | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/factory/fuzzy.py b/factory/fuzzy.py index 94599b7..a7e834c 100644 --- a/factory/fuzzy.py +++ b/factory/fuzzy.py @@ -1,6 +1,6 @@ # -*- coding: utf-8 -*- # Copyright (c) 2010 Mark Sandstrom -# Copyright (c) 2011-2013 Raphaël Barrois +# Copyright (c) 2011-2015 Raphaël Barrois # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal @@ -34,6 +34,25 @@ from . import compat from . import declarations +_random = random.Random() + + +def get_random_state(): + """Retrieve the state of factory.fuzzy's random generator.""" + return _random.getstate() + + +def set_random_state(state): + """Force-set the state of factory.fuzzy's random generator.""" + return _random.setstate(state) + + +def reseed_random(seed): + """Reseed factory.fuzzy's random generator.""" + r = random.Random(seed) + set_random_state(r.getstate()) + + class BaseFuzzyAttribute(declarations.OrderedDeclaration): """Base class for fuzzy attributes. @@ -81,7 +100,7 @@ class FuzzyText(BaseFuzzyAttribute): """ def __init__(self, prefix='', length=12, suffix='', - chars=string.ascii_letters, **kwargs): + chars=string.ascii_letters, **kwargs): super(FuzzyText, self).__init__(**kwargs) self.prefix = prefix self.suffix = suffix @@ -89,19 +108,27 @@ class FuzzyText(BaseFuzzyAttribute): self.chars = tuple(chars) # Unroll iterators def fuzz(self): - chars = [random.choice(self.chars) for _i in range(self.length)] + chars = [_random.choice(self.chars) for _i in range(self.length)] return self.prefix + ''.join(chars) + self.suffix class FuzzyChoice(BaseFuzzyAttribute): - """Handles fuzzy choice of an attribute.""" + """Handles fuzzy choice of an attribute. + + Args: + choices (iterable): An iterable yielding options; will only be unrolled + on the first call. + """ def __init__(self, choices, **kwargs): - self.choices = list(choices) + self.choices = None + self.choices_generator = choices super(FuzzyChoice, self).__init__(**kwargs) def fuzz(self): - return random.choice(self.choices) + if self.choices is None: + self.choices = list(self.choices_generator) + return _random.choice(self.choices) class FuzzyInteger(BaseFuzzyAttribute): @@ -119,7 +146,7 @@ class FuzzyInteger(BaseFuzzyAttribute): super(FuzzyInteger, self).__init__(**kwargs) def fuzz(self): - return random.randrange(self.low, self.high + 1, self.step) + return _random.randrange(self.low, self.high + 1, self.step) class FuzzyDecimal(BaseFuzzyAttribute): @@ -137,7 +164,7 @@ class FuzzyDecimal(BaseFuzzyAttribute): super(FuzzyDecimal, self).__init__(**kwargs) def fuzz(self): - base = compat.float_to_decimal(random.uniform(self.low, self.high)) + base = decimal.Decimal(str(_random.uniform(self.low, self.high))) return base.quantize(decimal.Decimal(10) ** -self.precision) @@ -155,7 +182,7 @@ class FuzzyFloat(BaseFuzzyAttribute): super(FuzzyFloat, self).__init__(**kwargs) def fuzz(self): - return random.uniform(self.low, self.high) + return _random.uniform(self.low, self.high) class FuzzyDate(BaseFuzzyAttribute): @@ -175,7 +202,7 @@ class FuzzyDate(BaseFuzzyAttribute): self.end_date = end_date.toordinal() def fuzz(self): - return datetime.date.fromordinal(random.randint(self.start_date, self.end_date)) + return datetime.date.fromordinal(_random.randint(self.start_date, self.end_date)) class BaseFuzzyDateTime(BaseFuzzyAttribute): @@ -215,7 +242,7 @@ class BaseFuzzyDateTime(BaseFuzzyAttribute): delta = self.end_dt - self.start_dt microseconds = delta.microseconds + 1000000 * (delta.seconds + (delta.days * 86400)) - offset = random.randint(0, microseconds) + offset = _random.randint(0, microseconds) result = self.start_dt + datetime.timedelta(microseconds=offset) if self.force_year is not None: @@ -270,10 +297,10 @@ class FuzzyDateTime(BaseFuzzyDateTime): def _check_bounds(self, start_dt, end_dt): if start_dt.tzinfo is None: raise ValueError( - "FuzzyDateTime only handles aware datetimes, got start=%r" + "FuzzyDateTime requires timezone-aware datetimes, got start=%r" % start_dt) if end_dt.tzinfo is None: raise ValueError( - "FuzzyDateTime only handles aware datetimes, got end=%r" + "FuzzyDateTime requires timezone-aware datetimes, got end=%r" % end_dt) super(FuzzyDateTime, self)._check_bounds(start_dt, end_dt) |