Fix .pyxdep files in pyximport and tests

pyximport/pyximport.py

@@ -112,6 +112,7 @@ def handle_special_build(modname, pyxfilename):
     return ext, setup_args
 
 def handle_dependencies(pyxfilename):
+    testing = '_test_files' in globals()
     dependfile = os.path.splitext(pyxfilename)[0] + PYXDEP_EXT
 
     # by default let distutils decide whether to rebuild on its own
@@ -132,6 +133,7 @@ def handle_dependencies(pyxfilename):
             files.extend(glob.glob(fullpath))
 
         # only for unit testing to see we did the right thing
+        if testing:
             _test_files[:] = []  #$pycheck_no
 
         # if any file that the pyxfile depends upon is newer than
@@ -143,6 +145,7 @@ def handle_dependencies(pyxfilename):
                 print("Rebuilding because of ", file)
                 filetime = os.path.getmtime(file)
                 os.utime(pyxfilename, (filetime, filetime))
+                if testing:
                     _test_files.append(file)
 
 def build_module(name, pyxfilename, pyxbuild_dir=None):

pyximport/test/test_pyximport.py

-import pyximport; pyximport.install()
+import pyximport; pyximport.install(reload_support=True)
 import os, sys
 import time, shutil
 import tempfile
@@ -21,6 +21,7 @@ def on_remove_file_error(func, path, excinfo):
     print "You may want to delete this yourself when you get a chance."
 
 def test():
+    pyximport._test_files = []
     tempdir = make_tempdir()
     sys.path.append(tempdir)
     filename = os.path.join(tempdir, "dummy.pyx")