plantuml: test for software release

software/plantuml/test/README.md

+Tests for PlantUML software release

software/plantuml/test/data/test_ascii_art.txt

+     ┌───┐          ┌─────┐
+     │Bob│          │Alice│
+     └─┬─┘          └──┬──┘
+       │    hello      │   
+       │──────────────>│   
+       │               │   
+       │   Go Away     │   
+       │<──────────────│   
+     ┌─┴─┐          ┌──┴──┐
+     │Bob│          │Alice│
+     └───┘          └─────┘

software/plantuml/test/setup.py

+##############################################################################
+#
+# Copyright (c) 2018 Nexedi SA and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+from setuptools import setup, find_packages
+import glob
+import os
+
+version = '0.0.1.dev0'
+name = 'slapos.test.plantuml'
+long_description = open("README.md").read()
+
+setup(name=name,
+      version=version,
+      description="Test for SlapOS' PlantUML",
+      long_description=long_description,
+      long_description_content_type='text/markdown',
+      maintainer="Nexedi",
+      maintainer_email="info@nexedi.com",
+      url="https://lab.nexedi.com/nexedi/slapos",
+      packages=find_packages(),
+      install_requires=[
+        'slapos.core',
+        'slapos.libnetworkcache',
+        'erp5.util',
+        'supervisor',
+        'psutil',
+        'plantuml',
+        'requests'
+        ],
+      zip_safe=True,
+      test_suite='test',
+    )

software/plantuml/test/test.py

+##############################################################################
+# coding: utf-8
+#
+# Copyright (c) 2018 Nexedi SA and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+import os
+import textwrap
+import hashlib
+from io import BytesIO
+
+from PIL import Image
+import requests
+import plantuml
+
+import utils
+
+# for development: debugging logs and install Ctrl+C handler
+if os.environ.get('DEBUG'):
+  import logging
+  logging.basicConfig(level=logging.DEBUG)
+  import unittest
+  unittest.installHandler()
+
+
+class PlantUMLTestCase(utils.SlapOSInstanceTestCase):
+  @classmethod
+  def getSoftwareURLList(cls):
+    return (os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'software.cfg')), )
+
+
+class TestSimpleDiagram(PlantUMLTestCase):
+  def setUp(self):
+    self.url = self.computer_partition.getConnectionParameterDict()["url"]
+    self.plantuml = plantuml.PlantUML(
+      url='{}/png/'.format(self.url),
+      http_opts={"disable_ssl_certificate_validation": True}
+    )
+
+  def assertImagesSimilar(self, i1, i2, tolerance=5):
+    """Assert images difference between images is less than `tolerance` %.
+   taken from https://rosettacode.org/wiki/Percentage_difference_between_images
+    """
+    pairs = zip(i1.getdata(), i2.getdata())
+    if len(i1.getbands()) == 1:
+      # for gray-scale jpegs
+      dif = sum(abs(p1-p2) for p1,p2 in pairs)
+    else:
+      dif = sum(abs(c1-c2) for p1,p2 in pairs for c1,c2 in zip(p1,p2))
+
+    ncomponents = i1.size[0] * i1.size[1] * 3
+    self.assertLessEqual((dif / 255.0 * 100) / ncomponents, tolerance)
+
+  def assertImagesSame(self, i1, i2):
+    """Assert images are exactly same."""
+    self.assertImagesSimilar(i1, i2, 0)
+
+  def test_sequence_diagram(self):
+    png = self.plantuml.processes(textwrap.dedent("""\
+    @startuml
+    Bob -> Alice : hello
+    Alice -> Bob : Go Away
+    @enduml
+    """))
+    # we cannot just compare the hash of the image against a reference that can be found with
+    # http://www.plantuml.com/plantuml/png/SoWkIImgAStDuNBAJrBGjLDmpCbCJbMmKiX8pSd9vuBmWC8WMIi5ztm5n_B4IYw7rBmKe1u0
+    # because plantuml include information about the server in the output image metadata ( you can
+    # use http://exif.regex.info/exif.cgi to see metadata )
+    # So we process the image to remove metadata.
+    reference = Image.open(os.path.join(os.path.dirname(__file__), "data", "test_sequence_diagram.png"))
+    self.assertImagesSame(Image.open(BytesIO(png)), reference)
+
+  def test_class_diagram(self):
+    """Class diagram require a working graphviz installation"""
+    png = self.plantuml.processes(textwrap.dedent("""\
+    @startuml
+    class Car
+
+    Driver - Car : drives >
+    Car *- Wheel : have 4 >
+    Car -- Person : < owns
+
+    @enduml
+    """))
+    # rendering is not exactly same on class diagrams, because of fonts and maybe also something in graphviz.
+    # We just compare that image are similar.
+
+    # http://www.plantuml.com/plantuml/png/SoWkIImgAStDuKhEIImkLd1EBEBYSYdAB4ijKj05yHIi5590t685EouGLqjN8JmZDJK7A9wHM9QgO08LrzLL24WjAixF0qhOAEINvnLpSJcavgK0ZGO0
+    reference = Image.open(os.path.join(os.path.dirname(__file__), "data", "test_class_diagram.png"))
+    self.assertImagesSimilar(Image.open(BytesIO(png)), reference)
+
+  def test_fonts(self):
+    """Test slapos provided fonts are used"""
+    png = self.plantuml.processes(textwrap.dedent("""\
+    @startuml
+    listfonts 私は申し訳ありません：私は日本語を話さない。Je ne parle pas japonais.
+    @enduml
+    """))
+    # URL on the reference implementation would be
+    # http://www.plantuml.com/plantuml/png/SoWkIImgAStDuSh9B2v9oyyhALPulhpnSUFwvrCsFswS_c85a6nwtDJrk77VuyRPZviclzyp2wBWsVIbp-QiUR5gtkEcIIzMRdpSEFLnuwh7ZIsF6vgyKXNoKXKA4ejoG6InGbPYGNvUOcQn7fT3QbuAq3O0
+    # but we don't have same fonts, so we compare against the fonts of a slapos instance.
+    reference = Image.open(os.path.join(os.path.dirname(__file__), "data", "test_fonts.png"))
+    self.assertImagesSimilar(Image.open(BytesIO(png)), reference)
+
+  def test_editor(self):
+    """Test the embedded editor"""
+    r = requests.get('{}/uml/'.format(self.url), verify=False)
+    self.assertEqual(r.status_code, requests.codes.ok)
+
+  def test_svg(self):
+    """Test svg rendering"""
+    image_key = plantuml.deflate_and_encode(textwrap.dedent("""\
+    @startuml
+    Bob -> Alice : hello
+    Alice -> Bob : Go Away
+    @enduml
+    """))
+    svg = requests.get('{}/svg/{}'.format(self.url, image_key), verify=False).text
+    self.assertIn('<?xml version="1.0" encoding="UTF-8"', svg)
+
+  def test_ascii_art(self):
+    """Test ascii art rendering"""
+    image_key = plantuml.deflate_and_encode(textwrap.dedent("""\
+    @startuml
+    Bob -> Alice : hello
+    Alice -> Bob : Go Away
+    @enduml
+    """))
+    aa = requests.get('{}/txt/{}'.format(self.url, image_key), verify=False).content
+    with open(os.path.join(os.path.dirname(__file__), "data", "test_ascii_art.txt"), 'rb') as reference:
+      self.assertEqual(aa, reference.read())
+
+
+class ServicesTestCase(PlantUMLTestCase):
+  @staticmethod
+  def generateHashFromFiles(file_list):
+    hasher = hashlib.md5()
+    for path in file_list:
+      with open(path, 'r') as afile:
+        buf = afile.read()
+      hasher.update("%s\n" % len(buf))
+      hasher.update(buf)
+    hash = hasher.hexdigest()
+    return hash
+
+  def test_hashes(self):
+    hash_files = [
+      'software_release/buildout.cfg',
+      'var/tomcat/conf/server.xml'
+    ]
+    expected_process_names = [
+      'tomcat-instance-{hash}-on-watch',
+    ]
+
+    supervisor = self.getSupervisorRPCServer().supervisor
+    process_names = [process['name']
+                     for process in supervisor.getAllProcessInfo()]
+
+    hash_files = [os.path.join(self.computer_partition_root_path, path)
+                  for path in hash_files]
+
+    for name in expected_process_names:
+      h = ServicesTestCase.generateHashFromFiles(hash_files)
+      expected_process_name = name.format(hash=h)
+
+      self.assertIn(expected_process_name, process_names)

software/plantuml/test/utils.py

+##############################################################################
+#
+# Copyright (c) 2018 Nexedi SA and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+import unittest
+import os
+import socket
+from contextlib import closing
+import logging
+import StringIO
+import xmlrpclib
+
+import supervisor.xmlrpc
+from erp5.util.testnode.SlapOSControler import SlapOSControler
+from erp5.util.testnode.ProcessManager import ProcessManager
+
+
+# Utility functions
+def findFreeTCPPort(ip=''):
+  """Find a free TCP port to listen to.
+  """
+  family = socket.AF_INET6 if ':' in ip else socket.AF_INET
+  with closing(socket.socket(family, socket.SOCK_STREAM)) as s:
+    s.bind((ip, 0))
+    return s.getsockname()[1]
+
+
+# TODO:
+#  - allow requesting multiple instances ?
+
+class SlapOSInstanceTestCase(unittest.TestCase):
+  """Install one slapos instance.
+
+  This test case install software(s) and request one instance during `setUpClass`
+  and destroy the instance during `tearDownClass`.
+
+  Software Release URL, Instance Software Type and Instance Parameters can be defined
+  on the class.
+
+  All tests from the test class will run with the same instance.
+  
+  The following class attributes are available:
+
+    * `computer_partition`:  the `slapos.core.XXX` computer partition instance.
+
+    * `computer_partition_root_path`: the path of the instance root directory,
+        
+  """
+  
+  # Methods to be defined by subclasses.
+  @classmethod
+  def getSoftwareURLList(cls):
+    """Return URL of software releases to install.
+
+    To be defined by subclasses.
+    """
+    raise NotImplementedError()
+
+  @classmethod
+  def getInstanceParameterDict(cls):
+    """Return instance parameters
+
+    To be defined by subclasses if they need to request instance with specific
+    parameters.
+    """
+    return {}
+
+  @classmethod
+  def getInstanceSoftwareType(cls):
+    """Return software type for instance, default "default"
+
+    To be defined by subclasses if they need to request instance with specific
+    software type.
+    """
+    return "default"
+
+  # Utility methods.
+  def getSupervisorRPCServer(self):
+    """Returns a XML-RPC connection to the supervisor used by slapos node
+
+    Refer to http://supervisord.org/api.html for details of available methods.
+    """
+    # xmlrpc over unix socket https://stackoverflow.com/a/11746051/7294664
+    return xmlrpclib.ServerProxy(
+       'http://slapos-supervisor',
+       transport=supervisor.xmlrpc.SupervisorTransport(
+           None,
+           None,
+           # XXX hardcoded socket path
+           serverurl="unix://{working_directory}/inst/supervisord.socket".format(
+             **self.config)))
+
+  # Unittest methods
+  @classmethod
+  def setUpClass(cls):
+    """Setup the class, build software and request an instance.
+    
+    If you have to override this method, do not forget to call this method on
+    parent class.
+    """
+    try:
+      cls.setUpWorkingDirectory()
+      cls.setUpConfig()
+      cls.setUpSlapOSController()
+
+      cls.runSoftwareRelease()
+      # XXX instead of "runSoftwareRelease", it would be better to be closer to slapos usage:
+      # cls.supplySoftwares()
+      # cls.installSoftwares()
+
+      cls.runComputerPartition()
+      # XXX instead of "runComputerPartition", it would be better to be closer to slapos usage:
+      # cls.requestInstances()
+      # cls.createInstances()
+      # cls.requestInstances()
+
+    except BaseException:
+      cls.stopSlapOSProcesses()
+      cls.setUp = lambda self: self.fail('Setup Class failed.')
+      raise
+
+  @classmethod
+  def tearDownClass(cls):
+    """Tear down class, stop the processes and destroy instance.
+    """
+    cls.stopSlapOSProcesses()
+
+  # Implementation
+  @classmethod
+  def stopSlapOSProcesses(cls):
+    if hasattr(cls, '_process_manager'):
+      cls._process_manager.killPreviousRun()
+
+  @classmethod
+  def setUpWorkingDirectory(cls):
+    """Initialise the directories"""
+    cls.working_directory = os.environ.get(
+        'SLAPOS_TEST_WORKING_DIR',
+        os.path.join(os.path.dirname(__file__), '.slapos'))
+    # To prevent error: Cannot open an HTTP server: socket.error reported
+    # AF_UNIX path too long This `working_directory` should not be too deep.
+    # Socket path is 108 char max on linux
+    # https://github.com/torvalds/linux/blob/3848ec5/net/unix/af_unix.c#L234-L238
+    # Supervisord socket name contains the pid number, which is why we add
+    # .xxxxxxx in this check.
+    if len(cls.working_directory + '/inst/supervisord.socket.xxxxxxx') > 108:
+      raise RuntimeError('working directory ( {} ) is too deep, try setting '
+              'SLAPOS_TEST_WORKING_DIR'.format(cls.working_directory))
+
+    if not os.path.exists(cls.working_directory):
+      os.mkdir(cls.working_directory)
+
+  @classmethod
+  def setUpConfig(cls):
+    """Create slapos configuration"""
+    cls.config = {
+      "working_directory": cls.working_directory,
+      "slapos_directory": cls.working_directory,
+      "log_directory": cls.working_directory,
+      "computer_id": 'slapos.test',  # XXX
+      'proxy_database': os.path.join(cls.working_directory, 'proxy.db'),
+      'partition_reference': cls.__name__,
+      # "proper" slapos command must be in $PATH
+      'slapos_binary': 'slapos',
+    }
+    # Some tests are expecting that local IP is not set to 127.0.0.1
+    ipv4_address = os.environ.get('LOCAL_IPV4', '127.0.1.1')
+    ipv6_address = os.environ['GLOBAL_IPV6']
+
+    cls.config['proxy_host'] = cls.config['ipv4_address'] = ipv4_address
+    cls.config['ipv6_address'] = ipv6_address
+    cls.config['proxy_port'] = findFreeTCPPort(ipv4_address)
+    cls.config['master_url'] = 'http://{proxy_host}:{proxy_port}'.format(
+      **cls.config)
+
+  @classmethod
+  def setUpSlapOSController(cls):
+    """Create the a "slapos controller" and supply softwares from `getSoftwareURLList`.
+
+    This is equivalent to:
+
+    slapos proxy start
+    for sr in getSoftwareURLList; do
+      slapos supply $SR $COMP
+    done
+    """ 
+    cls._process_manager = ProcessManager()
+
+    # XXX this code is copied from testnode code
+    cls.slapos_controler = SlapOSControler(
+        cls.working_directory,
+        cls.config
+    )
+
+    slapproxy_log = os.path.join(cls.config['log_directory'], 'slapproxy.log')
+    logger = logging.getLogger(__name__)
+    logger.debug('Configured slapproxy log to %r', slapproxy_log)
+
+    cls.software_url_list = cls.getSoftwareURLList()
+    cls.slapos_controler.initializeSlapOSControler(
+        slapproxy_log=slapproxy_log,
+        process_manager=cls._process_manager,
+        reset_software=False,
+        software_path_list=cls.software_url_list)
+
+    # XXX we should check *earlier* if that pidfile exist and if supervisord
+    # process still running, because if developer started supervisord (or bugs?)
+    # then another supervisord will start and starting services a second time
+    # will fail.
+    cls._process_manager.supervisord_pid_file = os.path.join(
+      cls.slapos_controler.instance_root, 'var', 'run', 'supervisord.pid')
+
+  @classmethod
+  def runSoftwareRelease(cls):
+    """Run all the software releases that were supplied before.
+
+    This is the equivalent of `slapos node software`.
+
+    The tests will be marked file if software building fail.
+    """
+    logger = logging.getLogger()
+    logger.level = logging.DEBUG
+    stream = StringIO.StringIO()
+    stream_handler = logging.StreamHandler(stream)
+    logger.addHandler(stream_handler)
+
+    try:
+      cls.software_status_dict = cls.slapos_controler.runSoftwareRelease(
+        cls.config, environment=os.environ)
+      stream.seek(0)
+      stream.flush()
+      message = ''.join(stream.readlines()[-100:])
+      assert cls.software_status_dict['status_code'] == 0, message
+    finally:
+      logger.removeHandler(stream_handler)
+      del stream
+
+
+  @classmethod
+  def runComputerPartition(cls):
+    """Instanciate the software.
+
+    This is the equivalent of doing:
+
+    slapos request --type=getInstanceSoftwareType --parameters=getInstanceParameterDict
+    slapos node instance
+
+    and return the slapos request instance parameters.
+
+    This can be called by tests to simulate re-request with different parameters.
+    """
+    logger = logging.getLogger()
+    logger.level = logging.DEBUG
+    stream = StringIO.StringIO()
+    stream_handler = logging.StreamHandler(stream)
+    logger.addHandler(stream_handler)
+
+    if cls.getInstanceSoftwareType() != 'default':
+      raise NotImplementedError
+
+    instance_parameter_dict = cls.getInstanceParameterDict()
+    try:
+      cls.instance_status_dict = cls.slapos_controler.runComputerPartition(
+        cls.config,
+        cluster_configuration=instance_parameter_dict,
+        environment=os.environ)
+      stream.seek(0)
+      stream.flush()
+      message = ''.join(stream.readlines()[-100:])
+      assert cls.instance_status_dict['status_code'] == 0, message
+    finally:
+      logger.removeHandler(stream_handler)
+      del stream
+
+    # FIXME: similar to test node, only one (root) partition is really
+    #        supported for now.
+    computer_partition_list = []
+    for i in range(len(cls.software_url_list)):
+      computer_partition_list.append(
+          cls.slapos_controler.slap.registerOpenOrder().request(
+            cls.software_url_list[i],
+            # This is how testnode's SlapOSControler name created partitions
+            partition_reference='testing partition {i}'.format(
+              i=i, **cls.config),
+            partition_parameter_kw=instance_parameter_dict))
+
+    # expose some class attributes so that tests can use them:
+    # the ComputerPartition instances, to getInstanceParameterDict
+    cls.computer_partition = computer_partition_list[0]
+
+    # the path of the instance on the filesystem, for low level inspection
+    cls.computer_partition_root_path = os.path.join(
+        cls.config['working_directory'],
+        'inst',
+        cls.computer_partition.getId())
+
+
+