hgweb: added test case for extension loading phases (issue1824)

this checks the order of module loading phases of hgweb.

`4) reposetup' lines are duplicated because hgweb calls
hg.repository() twice, one by __init__, another by refresh.

tests/test-extension

@@ -75,6 +75,20 b" echo 'bar = bar.py' >> $HGRCPATH"
 # command with no output, we just want to see the extensions loaded
 hg paths
 
+# check hgweb's load order
+echo '% hgweb.cgi'
+cat > hgweb.cgi <<EOF
+#!/usr/bin/env python
+from mercurial import demandimport; demandimport.enable()
+from mercurial.hgweb import hgweb
+from mercurial.hgweb import wsgicgi
+
+application = hgweb('.', 'test repo')
+wsgicgi.launch(application)
+EOF
+SCRIPT_NAME='/' SERVER_PORT='80' SERVER_NAME='localhost' python hgweb.cgi \
+    | grep '^[[:digit:]]) [[:alnum:] ]*$'  # ignores HTML output
+
 echo 'foo = !' >> $HGRCPATH
 echo 'bar = !' >> $HGRCPATH
 

tests/test-extension.out

@@ -24,6 +24,17 b' 3) foo extsetup'
 3) bar extsetup
 4) foo reposetup
 4) bar reposetup
+% hgweb.cgi
+1) foo imported
+1) bar imported
+2) foo uisetup
+2) bar uisetup
+3) foo extsetup
+3) bar extsetup
+4) foo reposetup
+4) bar reposetup
+4) foo reposetup
+4) bar reposetup
 empty extension - empty cmdtable
 
 no commands defined