250 lines
8.3 KiB
Python
250 lines
8.3 KiB
Python
import re
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import sys
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import parser
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d={}
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# d is the dictionary of unittest changes, keyed to the old name
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# used by unittest.
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# d[old][0] is the new replacement function.
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# d[old][1] is the operator you will substitute, or '' if there is none.
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# d[old][2] is the possible number of arguments to the unittest
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# function.
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# Old Unittest Name new name operator # of args
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d['assertRaises'] = ('raises', '', ['Any'])
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d['fail'] = ('raise AssertionError', '', [0,1])
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d['assert_'] = ('assert', '', [1,2])
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d['failIf'] = ('assert not', '', [1,2])
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d['assertEqual'] = ('assert', ' ==', [2,3])
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d['failIfEqual'] = ('assert not', ' ==', [2,3])
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d['assertIn'] = ('assert', ' in', [2,3])
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d['assertNotIn'] = ('assert', ' not in', [2,3])
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d['assertNotEqual'] = ('assert', ' !=', [2,3])
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d['failUnlessEqual'] = ('assert', ' ==', [2,3])
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d['assertAlmostEqual'] = ('assert round', ' ==', [2,3,4])
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d['failIfAlmostEqual'] = ('assert not round', ' ==', [2,3,4])
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d['assertNotAlmostEqual'] = ('assert round', ' !=', [2,3,4])
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d['failUnlessAlmostEquals'] = ('assert round', ' ==', [2,3,4])
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# the list of synonyms
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d['failUnlessRaises'] = d['assertRaises']
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d['failUnless'] = d['assert_']
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d['assertEquals'] = d['assertEqual']
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d['assertNotEquals'] = d['assertNotEqual']
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d['assertAlmostEquals'] = d['assertAlmostEqual']
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d['assertNotAlmostEquals'] = d['assertNotAlmostEqual']
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# set up the regular expressions we will need
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leading_spaces = re.compile(r'^(\s*)') # this never fails
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pat = ''
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for k in d.keys(): # this complicated pattern to match all unittests
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pat += '|' + r'^(\s*)' + 'self.' + k + r'\(' # \tself.whatever(
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old_names = re.compile(pat[1:])
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linesep='\n' # nobody will really try to convert files not read
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# in text mode, will they?
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def blocksplitter(fp):
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'''split a file into blocks that are headed by functions to rename'''
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blocklist = []
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blockstring = ''
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for line in fp:
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interesting = old_names.match(line)
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if interesting :
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if blockstring:
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blocklist.append(blockstring)
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blockstring = line # reset the block
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else:
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blockstring += line
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blocklist.append(blockstring)
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return blocklist
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def rewrite_utest(block):
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'''rewrite every block to use the new utest functions'''
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'''returns the rewritten unittest, unless it ran into problems,
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in which case it just returns the block unchanged.
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'''
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utest = old_names.match(block)
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if not utest:
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return block
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old = utest.group(0).lstrip()[5:-1] # the name we want to replace
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new = d[old][0] # the name of the replacement function
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op = d[old][1] # the operator you will use , or '' if there is none.
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possible_args = d[old][2] # a list of the number of arguments the
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# unittest function could possibly take.
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if possible_args == ['Any']: # just rename assertRaises & friends
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return re.sub('self.'+old, new, block)
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message_pos = possible_args[-1]
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# the remaining unittests can have an optional message to print
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# when they fail. It is always the last argument to the function.
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try:
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indent, argl, trailer = decompose_unittest(old, block)
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except SyntaxError: # but we couldn't parse it!
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return block
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argnum = len(argl)
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if argnum not in possible_args:
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# sanity check - this one isn't real either
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return block
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elif argnum == message_pos:
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message = argl[-1]
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argl = argl[:-1]
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else:
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message = None
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if argnum is 0 or (argnum is 1 and argnum is message_pos): #unittest fail()
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string = ''
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if message:
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message = ' ' + message
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elif message_pos is 4: # assertAlmostEqual & friends
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try:
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pos = argl[2].lstrip()
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except IndexError:
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pos = '7' # default if none is specified
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string = '(%s -%s, %s)%s 0' % (argl[0], argl[1], pos, op )
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else: # assert_, assertEquals and all the rest
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string = ' ' + op.join(argl)
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if message:
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string = string + ',' + message
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return indent + new + string + trailer
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def decompose_unittest(old, block):
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'''decompose the block into its component parts'''
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''' returns indent, arglist, trailer
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indent -- the indentation
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arglist -- the arguments to the unittest function
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trailer -- any extra junk after the closing paren, such as #commment
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'''
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indent = re.match(r'(\s*)', block).group()
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pat = re.search('self.' + old + r'\(', block)
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args, trailer = get_expr(block[pat.end():], ')')
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arglist = break_args(args, [])
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if arglist == ['']: # there weren't any
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return indent, [], trailer
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for i in range(len(arglist)):
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try:
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parser.expr(arglist[i].lstrip('\t '))
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except SyntaxError:
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if i == 0:
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arglist[i] = '(' + arglist[i] + ')'
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else:
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arglist[i] = ' (' + arglist[i] + ')'
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return indent, arglist, trailer
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def break_args(args, arglist):
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'''recursively break a string into a list of arguments'''
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try:
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first, rest = get_expr(args, ',')
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if not rest:
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return arglist + [first]
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else:
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return [first] + break_args(rest, arglist)
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except SyntaxError:
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return arglist + [args]
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def get_expr(s, char):
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'''split a string into an expression, and the rest of the string'''
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pos=[]
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for i in range(len(s)):
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if s[i] == char:
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pos.append(i)
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if pos == []:
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raise SyntaxError # we didn't find the expected char. Ick.
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for p in pos:
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# make the python parser do the hard work of deciding which comma
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# splits the string into two expressions
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try:
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parser.expr('(' + s[:p] + ')')
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return s[:p], s[p+1:]
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except SyntaxError: # It's not an expression yet
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pass
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raise SyntaxError # We never found anything that worked.
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def main():
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import sys
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import py
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usage = "usage: %prog [-s [filename ...] | [-i | -c filename ...]]"
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optparser = py.std.optparse.OptionParser(usage)
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def select_output (option, opt, value, optparser, **kw):
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if hasattr(optparser, 'output'):
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optparser.error(
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'Cannot combine -s -i and -c options. Use one only.')
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else:
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optparser.output = kw['output']
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optparser.add_option("-s", "--stdout", action="callback",
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callback=select_output,
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callback_kwargs={'output':'stdout'},
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help="send your output to stdout")
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optparser.add_option("-i", "--inplace", action="callback",
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callback=select_output,
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callback_kwargs={'output':'inplace'},
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help="overwrite files in place")
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optparser.add_option("-c", "--copy", action="callback",
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callback=select_output,
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callback_kwargs={'output':'copy'},
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help="copy files ... fn.py --> fn_cp.py")
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options, args = optparser.parse_args()
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output = getattr(optparser, 'output', 'stdout')
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if output in ['inplace', 'copy'] and not args:
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optparser.error(
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'-i and -c option require at least one filename')
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if not args:
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s = ''
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for block in blocksplitter(sys.stdin):
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s += rewrite_utest(block)
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sys.stdout.write(s)
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else:
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for infilename in args: # no error checking to see if we can open, etc.
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infile = file(infilename)
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s = ''
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for block in blocksplitter(infile):
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s += rewrite_utest(block)
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if output == 'inplace':
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outfile = file(infilename, 'w+')
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elif output == 'copy': # yes, just go clobber any existing .cp
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outfile = file (infilename[:-3]+ '_cp.py', 'w+')
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else:
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outfile = sys.stdout
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outfile.write(s)
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if __name__ == '__main__':
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main()
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