Lib/test/test_strftime.py

   1 #! /usr/bin/env python
   2
   3 # Sanity checker for time.strftime
   4
   5 import time, calendar, sys, os, re
   6 from test.test_support import verbose
   7
   8 def main():
   9     global verbose
  10     # For C Python, these tests expect C locale, so we try to set that
  11     # explicitly.  For Jython, Finn says we need to be in the US locale; my
  12     # understanding is that this is the closest Java gets to C's "C" locale.
  13     # Jython ought to supply an _locale module which Does The Right Thing, but
  14     # this is the best we can do given today's state of affairs.
  15     try:
  16         import java
  17         java.util.Locale.setDefault(java.util.Locale.US)
  18     except ImportError:
  19         # Can't do this first because it will succeed, even in Jython
  20         import locale
  21         locale.setlocale(locale.LC_TIME, 'C')
  22     now = time.time()
  23     strftest(now)
  24     verbose = 0
  25     # Try a bunch of dates and times,  chosen to vary through time of
  26     # day and daylight saving time
  27     for j in range(-5, 5):
  28         for i in range(25):
  29             strftest(now + (i + j*100)*23*3603)
  30
  31 def strftest(now):
  32     if verbose:
  33         print "strftime test for", time.ctime(now)
  34     nowsecs = str(long(now))[:-1]
  35     gmt = time.gmtime(now)
  36     now = time.localtime(now)
  37
  38     if now[3] < 12: ampm='(AM|am)'
  39     else: ampm='(PM|pm)'
  40
  41     jan1 = time.localtime(time.mktime((now[0], 1, 1) + (0,)*6))
  42
  43     try:
  44         if now[8]: tz = time.tzname[1]
  45         else: tz = time.tzname[0]
  46     except AttributeError:
  47         tz = ''
  48
  49     if now[3] > 12: clock12 = now[3] - 12
  50     elif now[3] > 0: clock12 = now[3]
  51     else: clock12 = 12
  52
  53     expectations = (
  54         ('%a', calendar.day_abbr[now[6]], 'abbreviated weekday name'),
  55         ('%A', calendar.day_name[now[6]], 'full weekday name'),
  56         ('%b', calendar.month_abbr[now[1]], 'abbreviated month name'),
  57         ('%B', calendar.month_name[now[1]], 'full month name'),
  58         # %c see below
  59         ('%d', '%02d' % now[2], 'day of month as number (00-31)'),
  60         ('%H', '%02d' % now[3], 'hour (00-23)'),
  61         ('%I', '%02d' % clock12, 'hour (01-12)'),
  62         ('%j', '%03d' % now[7], 'julian day (001-366)'),
  63         ('%m', '%02d' % now[1], 'month as number (01-12)'),
  64         ('%M', '%02d' % now[4], 'minute, (00-59)'),
  65         ('%p', ampm, 'AM or PM as appropriate'),
  66         ('%S', '%02d' % now[5], 'seconds of current time (00-60)'),
  67         ('%U', '%02d' % ((now[7] + jan1[6])//7),
  68          'week number of the year (Sun 1st)'),
  69         ('%w', '0?%d' % ((1+now[6]) % 7), 'weekday as a number (Sun 1st)'),
  70         ('%W', '%02d' % ((now[7] + (jan1[6] - 1)%7)//7),
  71          'week number of the year (Mon 1st)'),
  72         # %x see below
  73         ('%X', '%02d:%02d:%02d' % (now[3], now[4], now[5]), '%H:%M:%S'),
  74         ('%y', '%02d' % (now[0]%100), 'year without century'),
  75         ('%Y', '%d' % now[0], 'year with century'),
  76         # %Z see below
  77         ('%%', '%', 'single percent sign'),
  78         )
  79
  80     nonstandard_expectations = (
  81         # These are standard but don't have predictable output
  82         ('%c', fixasctime(time.asctime(now)), 'near-asctime() format'),
  83         ('%x', '%02d/%02d/%02d' % (now[1], now[2], (now[0]%100)),
  84          '%m/%d/%y %H:%M:%S'),
  85         ('%Z', '%s' % tz, 'time zone name'),
  86
  87         # These are some platform specific extensions
  88         ('%D', '%02d/%02d/%02d' % (now[1], now[2], (now[0]%100)), 'mm/dd/yy'),
  89         ('%e', '%2d' % now[2], 'day of month as number, blank padded ( 0-31)'),
  90         ('%h', calendar.month_abbr[now[1]], 'abbreviated month name'),
  91         ('%k', '%2d' % now[3], 'hour, blank padded ( 0-23)'),
  92         ('%n', '\n', 'newline character'),
  93         ('%r', '%02d:%02d:%02d %s' % (clock12, now[4], now[5], ampm),
  94          '%I:%M:%S %p'),
  95         ('%R', '%02d:%02d' % (now[3], now[4]), '%H:%M'),
  96         ('%s', nowsecs, 'seconds since the Epoch in UCT'),
  97         ('%t', '\t', 'tab character'),
  98         ('%T', '%02d:%02d:%02d' % (now[3], now[4], now[5]), '%H:%M:%S'),
  99         ('%3y', '%03d' % (now[0]%100),
 100          'year without century rendered using fieldwidth'),
 101         )
 102
 103     if verbose:
 104         print "Strftime test, platform: %s, Python version: %s" % \
 105               (sys.platform, sys.version.split()[0])
 106
 107     for e in expectations:
 108         try:
 109             result = time.strftime(e[0], now)
 110         except ValueError, error:
 111             print "Standard '%s' format gave error:" % e[0], error
 112             continue
 113         if re.match(e[1], result): continue
 114         if not result or result[0] == '%':
 115             print "Does not support standard '%s' format (%s)" % (e[0], e[2])
 116         else:
 117             print "Conflict for %s (%s):" % (e[0], e[2])
 118             print "  Expected %s, but got %s" % (e[1], result)
 119
 120     for e in nonstandard_expectations:
 121         try:
 122             result = time.strftime(e[0], now)
 123         except ValueError, result:
 124             if verbose:
 125                 print "Error for nonstandard '%s' format (%s): %s" % \
 126                       (e[0], e[2], str(result))
 127             continue
 128         if re.match(e[1], result):
 129             if verbose:
 130                 print "Supports nonstandard '%s' format (%s)" % (e[0], e[2])
 131         elif not result or result[0] == '%':
 132             if verbose:
 133                 print "Does not appear to support '%s' format (%s)" % (e[0],
 134                                                                        e[2])
 135         else:
 136             if verbose:
 137                 print "Conflict for nonstandard '%s' format (%s):" % (e[0],
 138                                                                       e[2])
 139                 print "  Expected %s, but got %s" % (e[1], result)
 140
 141 def fixasctime(s):
 142     if s[8] == ' ':
 143         s = s[:8] + '0' + s[9:]
 144     return s
 145
 146 main()