selftest/signing.py: verify that images can be created from signed packages

(From OE-Core rev: e53b93181ea1723ddeeb75c4195e9412e64721c0)

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/signing.py

@@ -34,8 +34,10 @@ class Signing(oeSelfTest):
         """
         Summary:     Test that packages can be signed in the package feed
         Expected:    Package should be signed with the correct key
+        Expected:    Images can be created from signed packages
         Product:     oe-core
         Author:      Daniel Istrate <daniel.alexandrux.istrate@intel.com>
+        Author:      Alexander Kanavin <alexander.kanavin@intel.com>
         AutomatedBy: Daniel Istrate <daniel.alexandrux.istrate@intel.com>
         """
         import oe.packagedata
@@ -85,6 +87,12 @@ class Signing(oeSelfTest):
         self.assertIn('rsa sha1 (md5) pgp md5 OK', ret.output, 'Package signed incorrectly.')
         shutil.rmtree(rpmdb)
 
+        #Check that an image can be built from signed packages
+        self.add_command_to_tearDown('bitbake -c clean core-image-minimal')
+        bitbake('-c clean core-image-minimal')
+        bitbake('core-image-minimal')
+
+
     @testcase(1382)
     def test_signing_sstate_archive(self):
         """