25 files changed, 1123 insertions, 0 deletions

diff --git a/meta/lib/patchtest/tests/__init__.py b/meta/lib/patchtest/tests/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/meta/lib/patchtest/tests/__init__.py
diff --git a/meta/lib/patchtest/tests/base.py b/meta/lib/patchtest/tests/base.py
new file mode 100644
index 0000000000..27db380353
--- /dev/null
+++ b/meta/lib/patchtest/tests/base.py
@@ -0,0 +1,239 @@
+# Base class to be used by all test cases defined in the suite
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import unittest
+import logging
+import json
+import unidiff
+from data import PatchTestInput
+import mailbox
+import collections
+import sys
+import os
+import re
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'pyparsing'))
+
+logger = logging.getLogger('patchtest')
+debug=logger.debug
+info=logger.info
+warn=logger.warn
+error=logger.error
+
+Commit = collections.namedtuple('Commit', ['author', 'subject', 'commit_message', 'shortlog', 'payload'])
+
+class PatchtestOEError(Exception):
+    """Exception for handling patchtest-oe errors"""
+    def __init__(self, message, exitcode=1):
+        super().__init__(message)
+        self.exitcode = exitcode
+
+class Base(unittest.TestCase):
+    # if unit test fails, fail message will throw at least the following JSON: {"id": <testid>}
+
+    endcommit_messages_regex = re.compile('\(From \w+-\w+ rev:|(?<!\S)Signed-off-by|(?<!\S)---\n')
+    patchmetadata_regex   = re.compile('-{3} \S+|\+{3} \S+|@{2} -\d+,\d+ \+\d+,\d+ @{2} \S+')
+
+
+    @staticmethod
+    def msg_to_commit(msg):
+        payload = msg.get_payload()
+        return Commit(subject=msg['subject'].replace('\n', ' ').replace('  ', ' '),
+                      author=msg.get('From'),
+                      shortlog=Base.shortlog(msg['subject']),
+                      commit_message=Base.commit_message(payload),
+                      payload=payload)
+
+    @staticmethod
+    def commit_message(payload):
+        commit_message = payload.__str__()
+        match = Base.endcommit_messages_regex.search(payload)
+        if match:
+            commit_message = payload[:match.start()]
+        return commit_message
+
+    @staticmethod
+    def shortlog(shlog):
+        # remove possible prefix (between brackets) before colon
+        start = shlog.find(']', 0, shlog.find(':'))
+        # remove also newlines and spaces at both sides
+        return shlog[start + 1:].replace('\n', '').strip()
+
+    @classmethod
+    def setUpClass(cls):
+
+        # General objects: mailbox.mbox and patchset
+        cls.mbox = mailbox.mbox(PatchTestInput.repo.patch)
+
+        # Patch may be malformed, so try parsing it
+        cls.unidiff_parse_error = ''
+        cls.patchset = None
+        try:
+            cls.patchset = unidiff.PatchSet.from_filename(PatchTestInput.repo.patch, encoding=u'UTF-8')
+        except unidiff.UnidiffParseError as upe:
+            cls.patchset = []
+            cls.unidiff_parse_error = str(upe)
+
+        # Easy to iterate list of commits
+        cls.commits = []
+        for msg in cls.mbox:
+            if msg['subject'] and msg.get_payload():
+                cls.commits.append(Base.msg_to_commit(msg))
+
+        cls.setUpClassLocal()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.tearDownClassLocal()
+
+    @classmethod
+    def setUpClassLocal(cls):
+        pass
+
+    @classmethod
+    def tearDownClassLocal(cls):
+        pass
+
+    def fail(self, issue, fix=None, commit=None, data=None):
+        """ Convert to a JSON string failure data"""
+        value = {'id': self.id(),
+                 'issue': issue}
+
+        if fix:
+            value['fix'] = fix
+        if commit:
+            value['commit'] = {'subject': commit.subject,
+                               'shortlog': commit.shortlog}
+
+        # extend return value with other useful info
+        if data:
+            value['data'] = data
+
+        return super(Base, self).fail(json.dumps(value))
+
+    def skip(self, issue, data=None):
+        """ Convert the skip string to JSON"""
+        value = {'id': self.id(),
+                 'issue': issue}
+
+        # extend return value with other useful info
+        if data:
+            value['data'] = data
+
+        return super(Base, self).skipTest(json.dumps(value))
+
+    def shortid(self):
+        return self.id().split('.')[-1]
+
+    def __str__(self):
+        return json.dumps({'id': self.id()})
+
+class Metadata(Base):
+    @classmethod
+    def setUpClassLocal(cls):
+        cls.tinfoil = cls.setup_tinfoil()
+
+        # get info about added/modified/remove recipes
+        cls.added, cls.modified, cls.removed = cls.get_metadata_stats(cls.patchset)
+
+    @classmethod
+    def tearDownClassLocal(cls):
+        cls.tinfoil.shutdown()
+
+    @classmethod
+    def setup_tinfoil(cls, config_only=False):
+        """Initialize tinfoil api from bitbake"""
+
+        # import relevant libraries
+        try:
+            scripts_path = os.path.join(PatchTestInput.repodir, 'scripts', 'lib')
+            if scripts_path not in sys.path:
+                sys.path.insert(0, scripts_path)
+            import scriptpath
+            scriptpath.add_bitbake_lib_path()
+            import bb.tinfoil
+        except ImportError:
+            raise PatchtestOEError('Could not import tinfoil module')
+
+        orig_cwd = os.path.abspath(os.curdir)
+
+        # Load tinfoil
+        tinfoil = None
+        try:
+            builddir = os.environ.get('BUILDDIR')
+            if not builddir:
+                logger.warn('Bitbake environment not loaded?')
+                return tinfoil
+            os.chdir(builddir)
+            tinfoil = bb.tinfoil.Tinfoil()
+            tinfoil.prepare(config_only=config_only)
+        except bb.tinfoil.TinfoilUIException as te:
+            if tinfoil:
+                tinfoil.shutdown()
+            raise PatchtestOEError('Could not prepare properly tinfoil (TinfoilUIException)')
+        except Exception as e:
+            if tinfoil:
+                tinfoil.shutdown()
+            raise e
+        finally:
+            os.chdir(orig_cwd)
+
+        return tinfoil
+
+    @classmethod
+    def get_metadata_stats(cls, patchset):
+        """Get lists of added, modified and removed metadata files"""
+
+        def find_pn(data, path):
+            """Find the PN from data"""
+            pn = None
+            pn_native = None
+            for _path, _pn in data:
+                if path in _path:
+                    if 'native' in _pn:
+                        # store the native PN but look for the non-native one first
+                        pn_native = _pn
+                    else:
+                        pn = _pn
+                        break
+            else:
+                # sent the native PN if found previously
+                if pn_native:
+                    return pn_native
+
+                # on renames (usually upgrades), we need to check (FILE) base names
+                # because the unidiff library does not provided the new filename, just the modified one
+                # and tinfoil datastore, once the patch is merged, will contain the new filename
+                path_basename = path.split('_')[0]
+                for _path, _pn in data:
+                    _path_basename = _path.split('_')[0]
+                    if path_basename == _path_basename:
+                        pn = _pn
+            return pn
+
+        if not cls.tinfoil:
+            cls.tinfoil = cls.setup_tinfoil()
+
+        added_paths, modified_paths, removed_paths = [], [], []
+        added, modified, removed = [], [], []
+
+        # get metadata filename additions, modification and removals
+        for patch in patchset:
+            if patch.path.endswith('.bb') or patch.path.endswith('.bbappend') or patch.path.endswith('.inc'):
+                if patch.is_added_file:
+                    added_paths.append(os.path.join(os.path.abspath(PatchTestInput.repodir), patch.path))
+                elif patch.is_modified_file:
+                    modified_paths.append(os.path.join(os.path.abspath(PatchTestInput.repodir), patch.path))
+                elif patch.is_removed_file:
+                    removed_paths.append(os.path.join(os.path.abspath(PatchTestInput.repodir), patch.path))
+
+        data = cls.tinfoil.cooker.recipecaches[''].pkg_fn.items()
+
+        added = [find_pn(data,path) for path in added_paths]
+        modified = [find_pn(data,path) for path in modified_paths]
+        removed = [find_pn(data,path) for path in removed_paths]
+
+        return [a for a in added if a], [m for m in modified if m], [r for r in removed if r]
diff --git a/meta/lib/patchtest/tests/pyparsing/common.py b/meta/lib/patchtest/tests/pyparsing/common.py
new file mode 100644
index 0000000000..9d37b0403d
--- /dev/null
+++ b/meta/lib/patchtest/tests/pyparsing/common.py
@@ -0,0 +1,26 @@
+# common pyparsing variables
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import pyparsing
+
+# general
+colon = pyparsing.Literal(":")
+start = pyparsing.LineStart()
+end   = pyparsing.LineEnd()
+at = pyparsing.Literal("@")
+lessthan = pyparsing.Literal("<")
+greaterthan = pyparsing.Literal(">")
+opensquare = pyparsing.Literal("[")
+closesquare = pyparsing.Literal("]")
+inappropriate = pyparsing.CaselessLiteral("Inappropriate")
+submitted = pyparsing.CaselessLiteral("Submitted")
+
+# word related
+nestexpr = pyparsing.nestedExpr(opener='[', closer=']')
+inappropriateinfo = pyparsing.Literal("Inappropriate") + nestexpr
+submittedinfo = pyparsing.Literal("Submitted") + nestexpr
+word = pyparsing.Word(pyparsing.alphas)
+worddot = pyparsing.Word(pyparsing.alphas+".")
diff --git a/meta/lib/patchtest/tests/pyparsing/parse_cve_tags.py b/meta/lib/patchtest/tests/pyparsing/parse_cve_tags.py
new file mode 100644
index 0000000000..dd7131a650
--- /dev/null
+++ b/meta/lib/patchtest/tests/pyparsing/parse_cve_tags.py
@@ -0,0 +1,18 @@
+# signed-off-by pyparsing definition
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+
+import pyparsing
+import common
+
+name = pyparsing.Regex('\S+.*(?= <)')
+username = pyparsing.OneOrMore(common.worddot)
+domain = pyparsing.OneOrMore(common.worddot)
+cve = pyparsing.Regex('CVE\-\d{4}\-\d+')
+cve_mark = pyparsing.Literal("CVE:")
+
+cve_tag = pyparsing.AtLineStart(cve_mark + cve)
+patch_cve_tag = pyparsing.AtLineStart("+" + cve_mark + cve)
diff --git a/meta/lib/patchtest/tests/pyparsing/parse_shortlog.py b/meta/lib/patchtest/tests/pyparsing/parse_shortlog.py
new file mode 100644
index 0000000000..26e9612c4a
--- /dev/null
+++ b/meta/lib/patchtest/tests/pyparsing/parse_shortlog.py
@@ -0,0 +1,14 @@
+# subject pyparsing definition
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+# NOTE:This is an oversimplified syntax of the mbox's summary
+
+import pyparsing
+import common
+
+target        = pyparsing.OneOrMore(pyparsing.Word(pyparsing.printables.replace(':','')))
+summary       = pyparsing.OneOrMore(pyparsing.Word(pyparsing.printables))
+shortlog       = common.start + target + common.colon + summary + common.end
diff --git a/meta/lib/patchtest/tests/pyparsing/parse_signed_off_by.py b/meta/lib/patchtest/tests/pyparsing/parse_signed_off_by.py
new file mode 100644
index 0000000000..c8a4351551
--- /dev/null
+++ b/meta/lib/patchtest/tests/pyparsing/parse_signed_off_by.py
@@ -0,0 +1,22 @@
+# signed-off-by pyparsing definition
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+
+import pyparsing
+import common
+
+name = pyparsing.Regex('\S+.*(?= <)')
+username = pyparsing.OneOrMore(common.worddot)
+domain = pyparsing.OneOrMore(common.worddot)
+
+# taken from https://pyparsing-public.wikispaces.com/Helpful+Expressions
+email = pyparsing.Regex(r"(?P<user>[A-Za-z0-9._%+-]+)@(?P<hostname>[A-Za-z0-9.-]+)\.(?P<domain>[A-Za-z]{2,})")
+
+email_enclosed = common.lessthan + email + common.greaterthan
+
+signed_off_by_mark = pyparsing.Literal("Signed-off-by:")
+signed_off_by = pyparsing.AtLineStart(signed_off_by_mark + name + email_enclosed)
+patch_signed_off_by = pyparsing.AtLineStart("+" + signed_off_by_mark + name + email_enclosed)
diff --git a/meta/lib/patchtest/tests/pyparsing/parse_upstream_status.py b/meta/lib/patchtest/tests/pyparsing/parse_upstream_status.py
new file mode 100644
index 0000000000..511b36d033
--- /dev/null
+++ b/meta/lib/patchtest/tests/pyparsing/parse_upstream_status.py
@@ -0,0 +1,24 @@
+# upstream-status pyparsing definition
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+
+import common
+import pyparsing
+
+upstream_status_literal_valid_status = ["Pending", "Accepted", "Backport", "Denied", "Inappropriate", "Submitted"]
+upstream_status_nonliteral_valid_status = ["Pending", "Accepted", "Backport", "Denied", "Inappropriate [reason]", "Submitted [where]"]
+
+upstream_status_valid_status = pyparsing.Or(
+    [pyparsing.Literal(status) for status in upstream_status_literal_valid_status]
+)
+
+upstream_status_mark         = pyparsing.Literal("Upstream-Status")
+inappropriate_status_mark    = common.inappropriate
+submitted_status_mark        = common.submitted
+
+upstream_status              = common.start + upstream_status_mark + common.colon + upstream_status_valid_status
+upstream_status_inappropriate_info = common.start + upstream_status_mark + common.colon + common.inappropriateinfo
+upstream_status_submitted_info = common.start + upstream_status_mark + common.colon + common.submittedinfo
diff --git a/meta/lib/patchtest/tests/test_mbox_author.py b/meta/lib/patchtest/tests/test_mbox_author.py
new file mode 100644
index 0000000000..6c79f164d4
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_author.py
@@ -0,0 +1,29 @@
+# Checks related to the patch's author
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import re
+
+class Author(base.Base):
+
+    auh_email = '<auh@auh.yoctoproject.org>'
+
+    invalids = [re.compile("^Upgrade Helper.+"),
+                re.compile(re.escape(auh_email)),
+                re.compile("uh@not\.set"),
+                re.compile("\S+@example\.com")]
+
+
+    def test_author_valid(self):
+        for commit in self.commits:
+            for invalid in self.invalids:
+                if invalid.search(commit.author):
+                    self.fail('Invalid author %s' % commit.author, 'Resend the series with a valid patch\'s author', commit)
+
+    def test_non_auh_upgrade(self):
+        for commit in self.commits:
+            if self.auh_email in commit.payload:
+                self.fail('Invalid author %s in commit message' % self.auh_email, 'Resend the series with a valid patch\'s author', commit)
diff --git a/meta/lib/patchtest/tests/test_mbox_bugzilla.py b/meta/lib/patchtest/tests/test_mbox_bugzilla.py
new file mode 100644
index 0000000000..e8de48bb8d
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_bugzilla.py
@@ -0,0 +1,22 @@
+# Checks related to the patch's bugzilla tag
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import re
+import base
+
+class Bugzilla(base.Base):
+    rexp_detect     = re.compile("\[\s?YOCTO.*\]", re.IGNORECASE)
+    rexp_validation = re.compile("\[(\s?YOCTO\s?#\s?(\d+)\s?,?)+\]", re.IGNORECASE)
+
+    def test_bugzilla_entry_format(self):
+        for commit in Bugzilla.commits:
+            for line in commit.commit_message.splitlines():
+                if self.rexp_detect.match(line):
+                    if not self.rexp_validation.match(line):
+                        self.fail('Yocto Project bugzilla tag is not correctly formatted',
+                                  'Specify bugzilla ID in commit description with format: "[YOCTO #<bugzilla ID>]"',
+                                  commit)
+
diff --git a/meta/lib/patchtest/tests/test_mbox_cve.py b/meta/lib/patchtest/tests/test_mbox_cve.py
new file mode 100644
index 0000000000..f99194c094
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_cve.py
@@ -0,0 +1,49 @@
+# Checks related to the patch's CVE lines
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import base
+import os
+import parse_cve_tags
+import re
+
+class CVE(base.Base):
+
+    revert_shortlog_regex = re.compile('Revert\s+".*"')
+    prog = parse_cve_tags.cve_tag
+
+    def setUp(self):
+        if self.unidiff_parse_error:
+            self.skip('Parse error %s' % self.unidiff_parse_error)
+
+        # we are just interested in series that introduce CVE patches, thus discard other
+        # possibilities: modification to current CVEs, patch directly introduced into the
+        # recipe, upgrades already including the CVE, etc.
+        new_cves = [p for p in self.patchset if p.path.endswith('.patch') and p.is_added_file]
+        if not new_cves:
+            self.skip('No new CVE patches introduced')
+
+    def test_cve_presence_in_commit_message(self):
+        for commit in CVE.commits:
+            # skip those patches that revert older commits, these do not required the tag presence
+            if self.revert_shortlog_regex.match(commit.shortlog):
+                continue
+            if not self.prog.search_string(commit.payload):
+                self.fail('Missing or incorrectly formatted CVE tag in mbox',
+                          'Correct or include the CVE tag in the mbox with format: "CVE: CVE-YYYY-XXXX"',
+                          commit)
diff --git a/meta/lib/patchtest/tests/test_mbox_description.py b/meta/lib/patchtest/tests/test_mbox_description.py
new file mode 100644
index 0000000000..7addc6b5f7
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_description.py
@@ -0,0 +1,17 @@
+# Checks related to the patch's commit_message
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+
+class CommitMessage(base.Base):
+
+    def test_commit_message_presence(self):
+        for commit in CommitMessage.commits:
+            if not commit.commit_message.strip():
+                self.fail('Patch is missing a descriptive commit message',
+                          'Please include a commit message on your patch explaining the change (most importantly why the change is being made)',
+                          commit)
+
diff --git a/meta/lib/patchtest/tests/test_mbox_format.py b/meta/lib/patchtest/tests/test_mbox_format.py
new file mode 100644
index 0000000000..85c452ca0d
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_format.py
@@ -0,0 +1,16 @@
+# Checks correct parsing of mboxes
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import re
+
+class MboxFormat(base.Base):
+
+    def test_mbox_format(self):
+        if self.unidiff_parse_error:
+            self.fail('Series cannot be parsed correctly due to malformed diff lines',
+                      'Create the series again using git-format-patch and ensure it can be applied using git am',
+                      data=[('Diff line', re.sub('^.+:\s(?<!$)','',self.unidiff_parse_error))])
diff --git a/meta/lib/patchtest/tests/test_mbox_mailinglist.py b/meta/lib/patchtest/tests/test_mbox_mailinglist.py
new file mode 100644
index 0000000000..de38e205b1
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_mailinglist.py
@@ -0,0 +1,64 @@
+# Check if the series was intended for other project (not OE-Core)
+#
+# Copyright (C) 2017 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+import collections
+import base
+import re
+from data import PatchTestInput
+
+class MailingList(base.Base):
+
+    # base paths of main yocto project sub-projects
+    paths = {
+        'oe-core': ['meta-selftest', 'meta-skeleton', 'meta', 'scripts'],
+        'bitbake': ['bitbake'],
+        'documentation': ['documentation'],
+        'poky': ['meta-poky','meta-yocto-bsp'],
+        'oe': ['meta-gpe', 'meta-gnome', 'meta-efl', 'meta-networking', 'meta-multimedia','meta-initramfs', 'meta-ruby', 'contrib', 'meta-xfce', 'meta-filesystems', 'meta-perl', 'meta-webserver', 'meta-systemd', 'meta-oe', 'meta-python']
+        }
+
+    # scripts folder is a mix of oe-core and poky, most is oe-core code except:
+    poky_scripts = ['scripts/yocto-bsp', 'scripts/yocto-kernel', 'scripts/yocto-layer', 'scripts/lib/bsp']
+
+    Project = collections.namedtuple('Project', ['name', 'listemail', 'gitrepo', 'paths'])
+
+    bitbake = Project(name='Bitbake', listemail='bitbake-devel@lists.openembedded.org', gitrepo='http://git.openembedded.org/bitbake/', paths=paths['bitbake'])
+    doc     = Project(name='Documentantion', listemail='yocto@yoctoproject.org', gitrepo='http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/', paths=paths['documentation'])
+    poky    = Project(name='Poky', listemail='poky@yoctoproject.org', gitrepo='http://git.yoctoproject.org/cgit/cgit.cgi/poky/', paths=paths['poky'])
+    oe      = Project(name='oe', listemail='openembedded-devel@lists.openembedded.org', gitrepo='http://git.openembedded.org/meta-openembedded/', paths=paths['oe'])
+
+
+    def test_target_mailing_list(self):
+        """In case of merge failure, check for other targeted projects"""
+        if PatchTestInput.repo.ismerged:
+            self.skip('Series merged, no reason to check other mailing lists')
+
+        # a meta project may be indicted in the message subject, if this is the case, just fail
+        # TODO: there may be other project with no-meta prefix, we also need to detect these
+        project_regex = re.compile("\[(?P<project>meta-.+)\]")
+        for commit in MailingList.commits:
+            match = project_regex.match(commit.subject)
+            if match:
+                self.fail('Series sent to the wrong mailing list',
+                          'Check the project\'s README (%s) and send the patch to the indicated list' % match.group('project'),
+                          commit)
+
+        for patch in self.patchset:
+            folders = patch.path.split('/')
+            base_path = folders[0]
+            for project in [self.bitbake, self.doc, self.oe, self.poky]:
+                if base_path in  project.paths:
+                    self.fail('Series sent to the wrong mailing list or some patches from the series correspond to different mailing lists', 'Send the series again to the correct mailing list (ML)',
+                              data=[('Suggested ML', '%s [%s]' % (project.listemail, project.gitrepo)),
+                                    ('Patch\'s path:', patch.path)])
+
+            # check for poky's scripts code
+            if base_path.startswith('scripts'):
+                for poky_file in self.poky_scripts:
+                    if patch.path.startswith(poky_file):
+                        self.fail('Series sent to the wrong mailing list or some patches from the series correspond to different mailing lists', 'Send the series again to the correct mailing list (ML)',
+                                  data=[('Suggested ML', '%s [%s]' % (self.poky.listemail, self.poky.gitrepo)),('Patch\'s path:', patch.path)])
diff --git a/meta/lib/patchtest/tests/test_mbox_merge.py b/meta/lib/patchtest/tests/test_mbox_merge.py
new file mode 100644
index 0000000000..c8b6718d15
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_merge.py
@@ -0,0 +1,25 @@
+# Check if mbox was merged by patchtest
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+import base
+from data import PatchTestInput
+
+def headlog():
+    output = subprocess.check_output(
+        "cd %s; git log --pretty='%%h#%%aN#%%cD:#%%s' -1" % PatchTestInput.repodir,
+        universal_newlines=True,
+        shell=True
+        )
+    return output.split('#')
+
+class Merge(base.Base):
+    def test_series_merge_on_head(self):
+        if not PatchTestInput.repo.ismerged:
+            commithash, author, date, shortlog = headlog()
+            self.fail('Series does not apply on top of target branch',
+                      'Rebase your series on top of targeted branch',
+                      data=[('Targeted branch', '%s (currently at %s)' % (PatchTestInput.repo.branch, commithash))])
diff --git a/meta/lib/patchtest/tests/test_mbox_shortlog.py b/meta/lib/patchtest/tests/test_mbox_shortlog.py
new file mode 100644
index 0000000000..b6c2a209ff
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_shortlog.py
@@ -0,0 +1,41 @@
+# Checks related to the patch's  summary
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import parse_shortlog
+import pyparsing
+
+maxlength = 90
+
+class Shortlog(base.Base):
+
+    def test_shortlog_format(self):
+        for commit in Shortlog.commits:
+            shortlog = commit.shortlog
+            if not shortlog.strip():
+                self.skip('Empty shortlog, no reason to execute shortlog format test')
+            else:
+                # no reason to re-check on revert shortlogs
+                if shortlog.startswith('Revert "'):
+                    continue
+                try:
+                    parse_shortlog.shortlog.parseString(shortlog)
+                except pyparsing.ParseException as pe:
+                    self.fail('Shortlog does not follow expected format',
+                              'Commit shortlog (first line of commit message) should follow the format "<target>: <summary>"',
+                              commit)
+
+    def test_shortlog_length(self):
+        for commit in Shortlog.commits:
+            # no reason to re-check on revert shortlogs
+            shortlog = commit.shortlog
+            if shortlog.startswith('Revert "'):
+                continue
+            l = len(shortlog)
+            if l > maxlength:
+                self.fail('Commit shortlog is too long',
+                          'Edit shortlog so that it is %d characters or less (currently %d characters)' % (maxlength, l),
+                          commit)
diff --git a/meta/lib/patchtest/tests/test_mbox_signed_off_by.py b/meta/lib/patchtest/tests/test_mbox_signed_off_by.py
new file mode 100644
index 0000000000..6458951f1c
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_mbox_signed_off_by.py
@@ -0,0 +1,28 @@
+# Checks related to the patch's signed-off-by lines
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import parse_signed_off_by
+import re
+
+class SignedOffBy(base.Base):
+
+    revert_shortlog_regex = re.compile('Revert\s+".*"')
+
+    @classmethod
+    def setUpClassLocal(cls):
+        # match self.mark with no '+' preceding it
+        cls.prog = parse_signed_off_by.signed_off_by
+
+    def test_signed_off_by_presence(self):
+        for commit in SignedOffBy.commits:
+            # skip those patches that revert older commits, these do not required the tag presence
+            if self.revert_shortlog_regex.match(commit.shortlog):
+                continue
+            if not SignedOffBy.prog.search_string(commit.payload):
+                self.fail('Patch is missing Signed-off-by',
+                          'Sign off the patch (either manually or with "git commit --amend -s")',
+                          commit)
diff --git a/meta/lib/patchtest/tests/test_metadata_lic_files_chksum.py b/meta/lib/patchtest/tests/test_metadata_lic_files_chksum.py
new file mode 100644
index 0000000000..e9a5b6bb4e
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_metadata_lic_files_chksum.py
@@ -0,0 +1,82 @@
+# Checks related to the patch's LIC_FILES_CHKSUM  metadata variable
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import re
+from data import PatchTestInput, PatchTestDataStore
+
+class LicFilesChkSum(base.Metadata):
+    metadata = 'LIC_FILES_CHKSUM'
+    license  = 'LICENSE'
+    closed   = 'CLOSED'
+    lictag   = 'License-Update'
+    lictag_re  = re.compile("^%s:" % lictag, re.MULTILINE)
+
+    def setUp(self):
+        # these tests just make sense on patches that can be merged
+        if not PatchTestInput.repo.canbemerged:
+            self.skip('Patch cannot be merged')
+
+    def test_lic_files_chksum_presence(self):
+        if not self.added:
+            self.skip('No added recipes, skipping test')
+
+        for pn in self.added:
+            rd = self.tinfoil.parse_recipe(pn)
+            pathname = rd.getVar('FILE')
+            # we are not interested in images
+            if '/images/' in pathname:
+                continue
+            lic_files_chksum = rd.getVar(self.metadata)
+            if rd.getVar(self.license) == self.closed:
+                continue
+            if not lic_files_chksum:
+                self.fail('%s is missing in newly added recipe' % self.metadata,
+                          'Specify the variable %s in %s' % (self.metadata, pn))
+
+    def pretest_lic_files_chksum_modified_not_mentioned(self):
+        if not self.modified:
+            self.skip('No modified recipes, skipping pretest')
+        # get the proper metadata values
+        for pn in self.modified:
+            rd = self.tinfoil.parse_recipe(pn)
+            pathname = rd.getVar('FILE')
+            # we are not interested in images
+            if '/images/' in pathname:
+                continue
+            PatchTestDataStore['%s-%s-%s' % (self.shortid(),self.metadata,pn)] = rd.getVar(self.metadata)
+
+    def test_lic_files_chksum_modified_not_mentioned(self):
+        if not self.modified:
+            self.skip('No modified recipes, skipping test')
+
+        # get the proper metadata values
+        for pn in self.modified:
+            rd = self.tinfoil.parse_recipe(pn)
+            pathname = rd.getVar('FILE')
+            # we are not interested in images
+            if '/images/' in pathname:
+                continue
+            PatchTestDataStore['%s-%s-%s' % (self.shortid(),self.metadata,pn)] = rd.getVar(self.metadata)
+        # compare if there were changes between pre-merge and merge
+        for pn in self.modified:
+            pretest = PatchTestDataStore['pre%s-%s-%s' % (self.shortid(),self.metadata, pn)]
+            test    = PatchTestDataStore['%s-%s-%s' % (self.shortid(),self.metadata, pn)]
+
+            # TODO: this is workaround to avoid false-positives when pretest metadata is empty (not reason found yet)
+            # For more info, check bug 12284
+            if not pretest:
+                return
+
+            if pretest != test:
+                # if any patch on the series contain reference on the metadata, fail
+                for commit in self.commits:
+                    if self.lictag_re.search(commit.commit_message):
+                       break
+                else:
+                    self.fail('LIC_FILES_CHKSUM changed on target %s but there is no "%s" tag in commit message' % (pn, self.lictag),
+                              'Include "%s: <description>" into the commit message with a brief description' % self.lictag,
+                              data=[('Current checksum', pretest), ('New checksum', test)])
diff --git a/meta/lib/patchtest/tests/test_metadata_license.py b/meta/lib/patchtest/tests/test_metadata_license.py
new file mode 100644
index 0000000000..16604dbfb1
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_metadata_license.py
@@ -0,0 +1,55 @@
+# Checks related to the patch's LIC_FILES_CHKSUM  metadata variable
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import os
+from data import PatchTestInput
+
+class License(base.Metadata):
+    metadata = 'LICENSE'
+    invalid_license = 'PATCHTESTINVALID'
+
+    def setUp(self):
+        # these tests just make sense on patches that can be merged
+        if not PatchTestInput.repo.canbemerged:
+            self.skip('Patch cannot be merged')
+
+    def test_license_presence(self):
+        if not self.added:
+            self.skip('No added recipes, skipping test')
+
+        # TODO: this is a workaround so we can parse the recipe not
+        # containing the LICENSE var: add some default license instead
+        # of INVALID into auto.conf, then remove this line at the end
+        auto_conf = os.path.join(os.environ.get('BUILDDIR'), 'conf', 'auto.conf')
+        open_flag = 'w'
+        if os.path.exists(auto_conf):
+            open_flag = 'a'
+        with open(auto_conf, open_flag) as fd:
+            for pn in self.added:
+                fd.write('LICENSE ??= "%s"\n' % self.invalid_license)
+
+        no_license = False
+        for pn in self.added:
+            rd = self.tinfoil.parse_recipe(pn)
+            license = rd.getVar(self.metadata)
+            if license == self.invalid_license:
+                no_license = True
+                break
+
+        # remove auto.conf line or the file itself
+        if open_flag == 'w':
+            os.remove(auto_conf)
+        else:
+            fd = open(auto_conf, 'r')
+            lines = fd.readlines()
+            fd.close()
+            with open(auto_conf, 'w') as fd:
+                fd.write(''.join(lines[:-1]))
+
+        if no_license:
+            self.fail('Recipe does not have the LICENSE field set', 'Include a LICENSE into the new recipe')
+
diff --git a/meta/lib/patchtest/tests/test_metadata_max_length.py b/meta/lib/patchtest/tests/test_metadata_max_length.py
new file mode 100644
index 0000000000..04a5e23469
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_metadata_max_length.py
@@ -0,0 +1,26 @@
+# Checks related to patch line lengths
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import re
+
+class MaxLength(base.Base):
+    add_mark = re.compile('\+ ')
+    max_length = 200
+
+    def test_max_line_length(self):
+        for patch in self.patchset:
+            # for the moment, we are just interested in metadata
+            if patch.path.endswith('.patch'):
+                continue
+            payload = str(patch)
+            for line in payload.splitlines():
+                if self.add_mark.match(line):
+                    current_line_length = len(line[1:])
+                    if current_line_length > self.max_length:
+                        self.fail('Patch line too long (current length %s)' % current_line_length,
+                                  'Shorten the corresponding patch line (max length supported %s)' % self.max_length,
+                                  data=[('Patch', patch.path), ('Line', '%s ...' % line[0:80])])
diff --git a/meta/lib/patchtest/tests/test_metadata_src_uri.py b/meta/lib/patchtest/tests/test_metadata_src_uri.py
new file mode 100644
index 0000000000..718229d7ad
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_metadata_src_uri.py
@@ -0,0 +1,75 @@
+# Checks related to the patch's SRC_URI metadata variable
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+import base
+import re
+import os
+from data import PatchTestInput, PatchTestDataStore
+
+class SrcUri(base.Metadata):
+
+    metadata  = 'SRC_URI'
+    md5sum    = 'md5sum'
+    sha256sum = 'sha256sum'
+    git_regex = re.compile('^git\:\/\/.*')
+
+    def setUp(self):
+        # these tests just make sense on patches that can be merged
+        if not PatchTestInput.repo.canbemerged:
+            self.skip('Patch cannot be merged')
+
+    def pretest_src_uri_left_files(self):
+        if not self.modified:
+            self.skip('No modified recipes, skipping pretest')
+
+        # get the proper metadata values
+        for pn in self.modified:
+            # we are not interested in images
+            if 'core-image' in pn:
+                continue
+            rd = self.tinfoil.parse_recipe(pn)
+            PatchTestDataStore['%s-%s-%s' % (self.shortid(), self.metadata, pn)] = rd.getVar(self.metadata)
+
+    def test_src_uri_left_files(self):
+        if not self.modified:
+            self.skip('No modified recipes, skipping pretest')
+
+        # get the proper metadata values
+        for pn in self.modified:
+            # we are not interested in images
+            if 'core-image' in pn:
+                continue
+            rd = self.tinfoil.parse_recipe(pn)
+            PatchTestDataStore['%s-%s-%s' % (self.shortid(), self.metadata, pn)] = rd.getVar(self.metadata)
+
+        for pn in self.modified:
+            pretest_src_uri = PatchTestDataStore['pre%s-%s-%s' % (self.shortid(), self.metadata, pn)].split()
+            test_src_uri    = PatchTestDataStore['%s-%s-%s' % (self.shortid(), self.metadata, pn)].split()
+
+            pretest_files = set([os.path.basename(patch) for patch in pretest_src_uri if patch.startswith('file://')])
+            test_files    = set([os.path.basename(patch) for patch in test_src_uri    if patch.startswith('file://')])
+
+            # check if files were removed
+            if len(test_files) < len(pretest_files):
+
+                # get removals from patchset
+                filesremoved_from_patchset = set()
+                for patch in self.patchset:
+                    if patch.is_removed_file:
+                        filesremoved_from_patchset.add(os.path.basename(patch.path))
+
+                # get the deleted files from the SRC_URI
+                filesremoved_from_usr_uri = pretest_files - test_files
+
+                # finally, get those patches removed at SRC_URI and not removed from the patchset
+                # TODO: we are not taking into account  renames, so test may raise false positives
+                not_removed = filesremoved_from_usr_uri - filesremoved_from_patchset
+                if not_removed:
+                    self.fail('Patches not removed from tree',
+                              'Amend the patch containing the software patch file removal',
+                              data=[('Patch', f) for f in not_removed])
+
diff --git a/meta/lib/patchtest/tests/test_metadata_summary.py b/meta/lib/patchtest/tests/test_metadata_summary.py
new file mode 100644
index 0000000000..931b26768e
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_metadata_summary.py
@@ -0,0 +1,32 @@
+# Checks related to the patch's summary metadata variable
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+from data import PatchTestInput
+
+class Summary(base.Metadata):
+    metadata = 'SUMMARY'
+
+    def setUp(self):
+        # these tests just make sense on patches that can be merged
+        if not PatchTestInput.repo.canbemerged:
+            self.skip('Patch cannot be merged')
+
+    def test_summary_presence(self):
+        if not self.added:
+            self.skip('No added recipes, skipping test')
+
+        for pn in self.added:
+            # we are not interested in images
+            if 'core-image' in pn:
+                continue
+            rd = self.tinfoil.parse_recipe(pn)
+            summary = rd.getVar(self.metadata)
+
+            # "${PN} version ${PN}-${PR}" is the default, so fail if default
+            if summary.startswith('%s version' % pn):
+                self.fail('%s is missing in newly added recipe' % self.metadata,
+                          'Specify the variable %s in %s' % (self.metadata, pn))
diff --git a/meta/lib/patchtest/tests/test_patch_cve.py b/meta/lib/patchtest/tests/test_patch_cve.py
new file mode 100644
index 0000000000..46ed9ef791
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_patch_cve.py
@@ -0,0 +1,51 @@
+# Checks related to the patch's CVE lines
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import base
+import os
+import re
+
+class CVE(base.Base):
+
+    re_cve_pattern = re.compile("CVE\-\d{4}\-\d+", re.IGNORECASE)
+    re_cve_payload_tag     = re.compile("\+CVE:(\s+CVE\-\d{4}\-\d+)+")
+
+    def setUp(self):
+        if self.unidiff_parse_error:
+            self.skip('Parse error %s' % self.unidiff_parse_error)
+
+        # we are just interested in series that introduce CVE patches, thus discard other
+        # possibilities: modification to current CVEs, patch directly introduced into the
+        # recipe, upgrades already including the CVE, etc.
+        new_cves = [p for p in self.patchset if p.path.endswith('.patch') and p.is_added_file]
+        if not new_cves:
+            self.skip('No new CVE patches introduced')
+
+    def test_cve_tag_format(self):
+        for commit in CVE.commits:
+            if self.re_cve_pattern.search(commit.shortlog) or self.re_cve_pattern.search(commit.commit_message):
+                tag_found = False
+                for line in commit.payload.splitlines():
+                    if self.re_cve_payload_tag.match(line):
+                        tag_found = True
+                        break
+                if not tag_found:
+                    self.fail('Missing or incorrectly formatted CVE tag in included patch file',
+                              'Correct or include the CVE tag on cve patch with format: "CVE: CVE-YYYY-XXXX"',
+                              commit)
diff --git a/meta/lib/patchtest/tests/test_patch_signed_off_by.py b/meta/lib/patchtest/tests/test_patch_signed_off_by.py
new file mode 100644
index 0000000000..4855d6daf7
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_patch_signed_off_by.py
@@ -0,0 +1,43 @@
+# Checks related to the patch's signed-off-by lines
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import parse_signed_off_by
+import re
+
+class PatchSignedOffBy(base.Base):
+
+    @classmethod
+    def setUpClassLocal(cls):
+        cls.newpatches = []
+        # get just those relevant patches: new software patches
+        for patch in cls.patchset:
+            if patch.path.endswith('.patch') and patch.is_added_file:
+                cls.newpatches.append(patch)
+
+        cls.mark = str(parse_signed_off_by.signed_off_by_mark).strip('"')
+
+        # match PatchSignedOffBy.mark with '+' preceding it
+        cls.prog = parse_signed_off_by.patch_signed_off_by
+
+    def setUp(self):
+        if self.unidiff_parse_error:
+            self.skip('Parse error %s' % self.unidiff_parse_error)
+
+    def test_signed_off_by_presence(self):
+        if not PatchSignedOffBy.newpatches:
+            self.skip("There are no new software patches, no reason to test %s presence" % PatchSignedOffBy.mark)
+
+        for newpatch in PatchSignedOffBy.newpatches:
+            payload = newpatch.__str__()
+            for line in payload.splitlines():
+                if self.patchmetadata_regex.match(line):
+                    continue
+                if PatchSignedOffBy.prog.search_string(payload):
+                    break
+            else:
+                self.fail('A patch file has been added, but does not have a Signed-off-by tag',
+                          'Sign off the added patch file (%s)' % newpatch.path)
diff --git a/meta/lib/patchtest/tests/test_patch_upstream_status.py b/meta/lib/patchtest/tests/test_patch_upstream_status.py
new file mode 100644
index 0000000000..eda5353c66
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_patch_upstream_status.py
@@ -0,0 +1,64 @@
+# Checks related to the patch's upstream-status lines
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+import parse_upstream_status
+import pyparsing
+import os
+
+class PatchUpstreamStatus(base.Base):
+
+    upstream_status_regex = pyparsing.AtLineStart("+" + "Upstream-Status")
+
+    @classmethod
+    def setUpClassLocal(cls):
+        cls.newpatches = []
+        # get just those relevant patches: new software patches
+        for patch in cls.patchset:
+            if patch.path.endswith('.patch') and patch.is_added_file:
+                cls.newpatches.append(patch)
+
+    def setUp(self):
+        if self.unidiff_parse_error:
+            self.skip('Python-unidiff parse error')
+        self.valid_status    = ', '.join(parse_upstream_status.upstream_status_nonliteral_valid_status)
+        self.standard_format = 'Upstream-Status: <Valid status>'
+
+    def test_upstream_status_presence_format(self):
+        if not PatchUpstreamStatus.newpatches:
+            self.skip("There are no new software patches, no reason to test Upstream-Status presence/format")
+
+        for newpatch in PatchUpstreamStatus.newpatches:
+            payload = newpatch.__str__()
+            if not self.upstream_status_regex.search_string(payload):
+                self.fail('Added patch file is missing Upstream-Status in the header',
+                          'Add Upstream-Status: <Valid status> to the header of %s' % newpatch.path,
+                          data=[('Standard format', self.standard_format), ('Valid status', self.valid_status)])
+            for line in payload.splitlines():
+                if self.patchmetadata_regex.match(line):
+                    continue
+                if self.upstream_status_regex.search_string(line):
+                        if parse_upstream_status.inappropriate_status_mark.searchString(line):
+                            try:
+                                parse_upstream_status.upstream_status_inappropriate_info.parseString(line.lstrip('+'))
+                            except pyparsing.ParseException as pe:
+                                self.fail('Upstream-Status is Inappropriate, but no reason was provided',
+                                          'Include a brief reason why %s is inappropriate' % os.path.basename(newpatch.path),
+                                          data=[('Current', pe.pstr), ('Standard format', 'Upstream-Status: Inappropriate [reason]')])
+                        elif parse_upstream_status.submitted_status_mark.searchString(line):
+                            try:
+                                parse_upstream_status.upstream_status_submitted_info.parseString(line.lstrip('+'))
+                            except pyparsing.ParseException as pe:
+                                self.fail('Upstream-Status is Submitted, but it is not mentioned where',
+                                          'Include where %s was submitted' % os.path.basename(newpatch.path),
+                                          data=[('Current', pe.pstr), ('Standard format', 'Upstream-Status: Submitted [where]')])
+                        else:
+                            try:
+                                parse_upstream_status.upstream_status.parseString(line.lstrip('+'))
+                            except pyparsing.ParseException as pe:
+                                self.fail('Upstream-Status is in incorrect format',
+                                          'Fix Upstream-Status format in %s' % os.path.basename(newpatch.path),
+                                          data=[('Current', pe.pstr), ('Standard format', self.standard_format), ('Valid status', self.valid_status)])
diff --git a/meta/lib/patchtest/tests/test_python_pylint.py b/meta/lib/patchtest/tests/test_python_pylint.py
new file mode 100644
index 0000000000..ea8efb7c2a
--- /dev/null
+++ b/meta/lib/patchtest/tests/test_python_pylint.py
@@ -0,0 +1,61 @@
+# Checks related to the python code done with pylint
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import base
+from data import PatchTestInput
+import pylint.epylint as lint
+
+class PyLint(base.Base):
+    pythonpatches  = []
+    pylint_pretest = {}
+    pylint_test    = {}
+    pylint_options = " -E --disable='E0611, E1101, F0401, E0602' --msg-template='L:{line} F:{module} I:{msg}'"
+
+    @classmethod
+    def setUpClassLocal(cls):
+        # get just those patches touching python files
+        cls.pythonpatches = []
+        for patch in cls.patchset:
+            if patch.path.endswith('.py'):
+                if not patch.is_removed_file:
+                    cls.pythonpatches.append(patch)
+
+    def setUp(self):
+        if self.unidiff_parse_error:
+            self.skip('Python-unidiff parse error')
+        if not PatchTestInput.repo.canbemerged:
+            self.skip('Patch cannot be merged, no reason to execute the test method')
+        if not PyLint.pythonpatches:
+            self.skip('No python related patches, skipping test')
+
+    def pretest_pylint(self):
+        for pythonpatch in self.pythonpatches:
+            if pythonpatch.is_modified_file:
+                (pylint_stdout, pylint_stderr) = lint.py_run(command_options = pythonpatch.path + self.pylint_options, return_std=True)
+                for line in pylint_stdout.readlines():
+                    if not '*' in line:
+                        if line.strip():
+                            self.pylint_pretest[line.strip().split(' ',1)[0]] = line.strip().split(' ',1)[1]
+
+    def test_pylint(self):
+        for pythonpatch in self.pythonpatches:
+            # a condition checking whether a file is renamed or not
+            # unidiff doesn't support this yet
+            if pythonpatch.target_file is not pythonpatch.path:
+                path = pythonpatch.target_file[2:]
+            else:
+                path = pythonpatch.path
+            (pylint_stdout, pylint_stderr) = lint.py_run(command_options = path + self.pylint_options, return_std=True)
+            for line in pylint_stdout.readlines():
+                    if not '*' in line:
+                        if line.strip():
+                            self.pylint_test[line.strip().split(' ',1)[0]] = line.strip().split(' ',1)[1]
+
+        for issue in self.pylint_test:
+             if self.pylint_test[issue] not in self.pylint_pretest.values():
+                 self.fail('Errors in your Python code were encountered',
+                           'Correct the lines introduced by your patch',
+                           data=[('Output', 'Please, fix the listed issues:'), ('', issue + ' ' + self.pylint_test[issue])])