Lib/test/test_strftime.py

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