Prove that eggs downloading/uploading is supported.

src/zc/buildout/networkcache.txt

@@ -482,10 +482,43 @@ Buildout can download the content using the new certificate, because it still av
    Downloading hello.txt from network cache.
    download: Downloaded http://localhost/hello.txt
 
+Of course eggs are also supported by networkcache:
+
+   >>> write(sample_buildout, 'buildout.cfg',
+   ... '''
+   ... [buildout]
+   ...
+   ... networkcache-section = networkcache
+   ... find-links = %(link_server)s
+   ... develop = download
+   ... parts = eggs
+   ...
+   ... [eggs]
+   ... recipe = zc.recipe.egg:eggs
+   ... eggs = demoneeded == 1.2c1
+   ...
+   ... [networkcache]
+   ... download-cache-url = %(nc_url)sshacache
+   ... download-dir-url = %(nc_url)sshadir
+   ... upload-cache-url = %(nc_url)sshacache
+   ... upload-dir-url = %(nc_url)sshadir
+   ... ''' % globals())
+   >>> print system(buildout)
+   Networkcache enabled.
+   Networkcache download cache: 'http://localhost/shacache', directory 'http://localhost/shadir'
+   Networkcache upload cache: 'http://localhost/shacache', directory 'http://localhost/shadir'
+   Develop: '/sample-buildout/download'
+   Uninstalling download.
+   Installing eggs.
+   Getting distribution for 'demoneeded==1.2c1'.
+   Downloading demoneeded-1.2c1.zip from network cache.
+   Failed to download from network cache demoneeded-1.2c1.zip: 404 : Not Found
+   Uploading http://localhost/demoneeded-1.2c1.zip into network cache.
+   Got demoneeded 1.2c1.
+
 Todo:
 
- * downloading eggs
- * downloading extensions?
+ * downloading extends?
  * showing that wrong md5sum will fail to upload
 
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