Run unittests in a temporary directory

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Makefile.am

@@ -263,7 +263,9 @@ nodist_TESTS =
 
 TESTS = $(dist_TESTS) $(nodist_TESTS)
 
-TESTS_ENVIRONMENT = PYTHONPATH=.:$(top_builddir) $(PYTHON)
+TESTS_ENVIRONMENT = \
+	PYTHONPATH=. TOP_SRCDIR=$(abs_top_srcdir) \
+	$(RUN_IN_TEMPDIR) $(PYTHON)
 
 all-local: stamp-directories devel/upload \
 	doc/examples/bash_completion \
@@ -357,7 +359,8 @@ srclinks: stamp-directories
 	set -e; \
 	for i in man/footer.sgml $(pkgpython_PYTHON) $(hypervisor_PYTHON) \
 			$(rapi_PYTHON) $(http_PYTHON) $(confd_PYTHON) \
-			$(dist_sbin_SCRIPTS) $(dist_tools_SCRIPTS); do \
+			$(dist_sbin_SCRIPTS) $(dist_tools_SCRIPTS) \
+			$(dist_TESTS); do \
 		if test ! -f $$i -a -f $(abs_top_srcdir)/$$i; then \
 			$(LN_S) $(abs_top_srcdir)/$$i $$i; \
 		fi; \

test/testutils.py

@@ -83,10 +83,8 @@ class GanetiTestCase(unittest.TestCase):
         be used in 'make distcheck' rules
 
     """
-    prefix = os.environ.get("srcdir", "")
-    if prefix:
-      prefix = prefix + "/test/"
-    return "%sdata/%s" % (prefix, name)
+    prefix = os.environ.get("TOP_SRCDIR", ".")
+    return "%s/test/data/%s" % (prefix, name)
 
   @classmethod
   def _ReadTestData(cls, name):