Publish coverage information also from envsitedir

This is needed because otherwise we do not publish the
coverage information of the unit tests, but only those
coming from the aliBuild commands.

alibuild_helpers/utilities.py

@@ -29,6 +29,10 @@ class SpecError(Exception):
 
 asList = lambda x : x if type(x) == list else [x]
 
+# This function is only needed to check the coverage of the testsuite
+# is really happening and we did not made a mistake in tox.ini
+def check_coverage():
+  return True
 
 def resolve_store_path(architecture, spec_hash):
   """Return the path where a tarball with the given hash is to be stored.

tests/test_coverage.py

@@ -0,0 +1,7 @@
+import unittest
+from alibuild_helpers.utilities import check_coverage
+
+class FooTest(unittest.TestCase):
+    def test_foo(self):
+        self.assertTrue(check_coverage())
+

tox.ini

@@ -108,11 +108,13 @@ commands =
     coverage run --source={toxinidir} -a {toxinidir}/aliBuild init zlib
     touch zlib/foo
     coverage run --source={toxinidir} -a {toxinidir}/aliBuild -a {env:ARCHITECTURE} --no-system --disable GCC-Toolchain build zlib
+    coverage run --source={envsitepackagesdir} -a -m unittest discover {toxinidir}/tests
 
 [coverage:run]
 branch = True
-omit =
-    */.tox/*/lib/*
+include =
+    */alibuild*/*
+    */.tox/*/lib/*/alibuild_helpers/*
 
 [coverage:report]
 exclude_lines =