tests/test-newcgi.t

check-code: catch Python 'is' comparing number or string literals

The Python 'is' operator compares object identity, so it should
definitely not be applied to string or number literals, which Python
implementations are free to represent with a temporary object.

This should catch the following kinds of bogus expressions (examples):

  x is 'foo'     x is not 'foo'
  x is "bar"     x is not "bar"
  x is 42        x is not 42
  x is -36       x is not -36

As originally proposed by Martin Geisler, amended with catching
negative numbers.

This tests if CGI files from after d0db3462d568 but
before d74fc8dec2b4 still work.

  $ hg init test
  $ cat >hgweb.cgi <<HGWEB
  > #!/usr/bin/env python
  > #
  > # An example CGI script to use hgweb, edit as necessary
  > 
  > import cgitb
  > cgitb.enable()
  > 
  > from mercurial import demandimport; demandimport.enable()
  > from mercurial.hgweb import hgweb
  > from mercurial.hgweb import wsgicgi
  > from mercurial.hgweb.request import wsgiapplication
  > 
  > def make_web_app():
  >     return hgweb("test", "Empty test repository")
  > 
  > wsgicgi.launch(wsgiapplication(make_web_app))
  > HGWEB

  $ chmod 755 hgweb.cgi

  $ cat >hgweb.config <<HGWEBDIRCONF
  > [paths]
  > test = test
  > HGWEBDIRCONF

  $ cat >hgwebdir.cgi <<HGWEBDIR
  > #!/usr/bin/env python
  > #
  > # An example CGI script to export multiple hgweb repos, edit as necessary
  > 
  > import cgitb
  > cgitb.enable()
  > 
  > from mercurial import demandimport; demandimport.enable()
  > from mercurial.hgweb import hgwebdir
  > from mercurial.hgweb import wsgicgi
  > from mercurial.hgweb.request import wsgiapplication
  > 
  > def make_web_app():
  >     return hgwebdir("hgweb.config")
  > 
  > wsgicgi.launch(wsgiapplication(make_web_app))
  > HGWEBDIR

  $ chmod 755 hgwebdir.cgi

  $ DOCUMENT_ROOT="/var/www/hg"; export DOCUMENT_ROOT
  $ GATEWAY_INTERFACE="CGI/1.1"; export GATEWAY_INTERFACE
  $ HTTP_ACCEPT="text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"; export HTTP_ACCEPT
  $ HTTP_ACCEPT_CHARSET="ISO-8859-1,utf-8;q=0.7,*;q=0.7"; export HTTP_ACCEPT_CHARSET
  $ HTTP_ACCEPT_ENCODING="gzip,deflate"; export HTTP_ACCEPT_ENCODING
  $ HTTP_ACCEPT_LANGUAGE="en-us,en;q=0.5"; export HTTP_ACCEPT_LANGUAGE
  $ HTTP_CACHE_CONTROL="max-age=0"; export HTTP_CACHE_CONTROL
  $ HTTP_CONNECTION="keep-alive"; export HTTP_CONNECTION
  $ HTTP_HOST="hg.omnifarious.org"; export HTTP_HOST
  $ HTTP_KEEP_ALIVE="300"; export HTTP_KEEP_ALIVE
  $ HTTP_USER_AGENT="Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.0.4) Gecko/20060608 Ubuntu/dapper-security Firefox/1.5.0.4"; export HTTP_USER_AGENT
  $ PATH_INFO="/"; export PATH_INFO
  $ PATH_TRANSLATED="/var/www/hg/index.html"; export PATH_TRANSLATED
  $ QUERY_STRING=""; export QUERY_STRING
  $ REMOTE_ADDR="127.0.0.2"; export REMOTE_ADDR
  $ REMOTE_PORT="44703"; export REMOTE_PORT
  $ REQUEST_METHOD="GET"; export REQUEST_METHOD
  $ REQUEST_URI="/test/"; export REQUEST_URI
  $ SCRIPT_FILENAME="/home/hopper/hg_public/test.cgi"; export SCRIPT_FILENAME
  $ SCRIPT_NAME="/test"; export SCRIPT_NAME
  $ SCRIPT_URI="http://hg.omnifarious.org/test/"; export SCRIPT_URI
  $ SCRIPT_URL="/test/"; export SCRIPT_URL
  $ SERVER_ADDR="127.0.0.1"; export SERVER_ADDR
  $ SERVER_ADMIN="eric@localhost"; export SERVER_ADMIN
  $ SERVER_NAME="hg.omnifarious.org"; export SERVER_NAME
  $ SERVER_PORT="80"; export SERVER_PORT
  $ SERVER_PROTOCOL="HTTP/1.1"; export SERVER_PROTOCOL
  $ SERVER_SIGNATURE="<address>Apache/2.0.53 (Fedora) Server at hg.omnifarious.org Port 80</address>"; export SERVER_SIGNATURE
  $ SERVER_SOFTWARE="Apache/2.0.53 (Fedora)"; export SERVER_SOFTWARE

  $ python hgweb.cgi > page1
  $ python hgwebdir.cgi > page2

  $ PATH_INFO="/test/"
  $ PATH_TRANSLATED="/var/something/test.cgi"
  $ REQUEST_URI="/test/test/"
  $ SCRIPT_URI="http://hg.omnifarious.org/test/test/"
  $ SCRIPT_URL="/test/test/"
  $ python hgwebdir.cgi > page3

  $ grep -i error page1 page2 page3
  [1]