diff --git a/src/emuvim/test/test_emulator.py b/src/emuvim/test/test_emulator.py
index fb8714a..2038116 100755
--- a/src/emuvim/test/test_emulator.py
+++ b/src/emuvim/test/test_emulator.py
@@ -32,11 +32,11 @@
         # start Mininet network
         self.startNet()
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 0)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 1)
+        self.assertTrue(len(self.getDockernetContainers()) == 0)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 1)
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
         # stop Mininet network
         self.stopNet()
 
@@ -54,11 +54,11 @@
         # start Mininet network
         self.startNet()
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 0)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 2)
+        self.assertTrue(len(self.getDockernetContainers()) == 0)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 2)
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
         # stop Mininet network
         self.stopNet()
 
@@ -79,11 +79,11 @@
         # start Mininet network
         self.startNet()
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 0)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 5)
+        self.assertTrue(len(self.getDockernetContainers()) == 0)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 5)
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
         # stop Mininet network
         self.stopNet()
 
@@ -110,15 +110,15 @@
         # add compute resources
         vnf1 = self.dc[0].startCompute("vnf1")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 1)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 1)
+        self.assertTrue(len(self.getDockernetContainers()) == 1)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 1)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 1)
-        assert(isinstance(self.dc[0].listCompute()[0], EmulatorCompute))
-        assert(self.dc[0].listCompute()[0].name == "vnf1")
+        self.assertTrue(len(self.dc[0].listCompute()) == 1)
+        self.assertTrue(isinstance(self.dc[0].listCompute()[0], EmulatorCompute))
+        self.assertTrue(self.dc[0].listCompute()[0].name == "vnf1")
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], vnf1]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], vnf1]) <= 0.0)
         # stop Mininet network
         self.stopNet()
 
@@ -136,21 +136,21 @@
         # add compute resources
         vnf1 = self.dc[0].startCompute("vnf1")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 1)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 1)
+        self.assertTrue(len(self.getDockernetContainers()) == 1)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 1)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 1)
+        self.assertTrue(len(self.dc[0].listCompute()) == 1)
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], vnf1]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], vnf1]) <= 0.0)
         # remove compute resources
         self.dc[0].stopCompute("vnf1")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 0)
-        assert(len(self.net.hosts) == 1)
-        assert(len(self.net.switches) == 1)
+        self.assertTrue(len(self.getDockernetContainers()) == 0)
+        self.assertTrue(len(self.net.hosts) == 1)
+        self.assertTrue(len(self.net.switches) == 1)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 0)
+        self.assertTrue(len(self.dc[0].listCompute()) == 0)
         # stop Mininet network
         self.stopNet()
 
@@ -168,19 +168,19 @@
         # add compute resources
         vnf1 = self.dc[0].startCompute("vnf1")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 1)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 1)
+        self.assertTrue(len(self.getDockernetContainers()) == 1)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 1)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 1)
-        assert(isinstance(self.dc[0].listCompute()[0], EmulatorCompute))
-        assert(self.dc[0].listCompute()[0].name == "vnf1")
+        self.assertTrue(len(self.dc[0].listCompute()) == 1)
+        self.assertTrue(isinstance(self.dc[0].listCompute()[0], EmulatorCompute))
+        self.assertTrue(self.dc[0].listCompute()[0].name == "vnf1")
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], vnf1]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], vnf1]) <= 0.0)
         # check get status
         s = self.dc[0].containers.get("vnf1").getStatus()
-        assert(s["name"] == "vnf1")
-        assert(s["state"]["Running"])
+        self.assertTrue(s["name"] == "vnf1")
+        self.assertTrue(s["state"]["Running"])
         # stop Mininet network
         self.stopNet()
 
@@ -202,14 +202,14 @@
         vnf1 = self.dc[0].startCompute("vnf1")
         vnf2 = self.dc[1].startCompute("vnf2")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 2)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 5)
+        self.assertTrue(len(self.getDockernetContainers()) == 2)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 5)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 1)
-        assert(len(self.dc[1].listCompute()) == 1)
+        self.assertTrue(len(self.dc[0].listCompute()) == 1)
+        self.assertTrue(len(self.dc[1].listCompute()) == 1)
         # check connectivity by using ping
-        assert(self.net.ping([vnf1, vnf2]) <= 0.0)
+        self.assertTrue(self.net.ping([vnf1, vnf2]) <= 0.0)
         # stop Mininet network
         self.stopNet()
 
@@ -231,38 +231,38 @@
         vnf1 = self.dc[0].startCompute("vnf1")
         vnf2 = self.dc[1].startCompute("vnf2")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 2)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 5)
+        self.assertTrue(len(self.getDockernetContainers()) == 2)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 5)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 1)
-        assert(len(self.dc[1].listCompute()) == 1)
+        self.assertTrue(len(self.dc[0].listCompute()) == 1)
+        self.assertTrue(len(self.dc[1].listCompute()) == 1)
         # check connectivity by using ping
-        assert(self.net.ping([vnf1, vnf2]) <= 0.0)
+        self.assertTrue(self.net.ping([vnf1, vnf2]) <= 0.0)
         # remove compute resources
         self.dc[0].stopCompute("vnf1")
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 1)
-        assert(len(self.net.hosts) == 1)
-        assert(len(self.net.switches) == 5)
+        self.assertTrue(len(self.getDockernetContainers()) == 1)
+        self.assertTrue(len(self.net.hosts) == 1)
+        self.assertTrue(len(self.net.switches) == 5)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 0)
-        assert(len(self.dc[1].listCompute()) == 1)
+        self.assertTrue(len(self.dc[0].listCompute()) == 0)
+        self.assertTrue(len(self.dc[1].listCompute()) == 1)
         # add compute resources
         vnf3 = self.dc[0].startCompute("vnf3")
         vnf4 = self.dc[0].startCompute("vnf4")
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 2)
-        assert(len(self.dc[1].listCompute()) == 1)
-        assert(self.net.ping([vnf3, vnf2]) <= 0.0)
-        assert(self.net.ping([vnf4, vnf2]) <= 0.0)
+        self.assertTrue(len(self.dc[0].listCompute()) == 2)
+        self.assertTrue(len(self.dc[1].listCompute()) == 1)
+        self.assertTrue(self.net.ping([vnf3, vnf2]) <= 0.0)
+        self.assertTrue(self.net.ping([vnf4, vnf2]) <= 0.0)
         # remove compute resources
         self.dc[0].stopCompute("vnf3")
         self.dc[0].stopCompute("vnf4")
         self.dc[1].stopCompute("vnf2")
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 0)
-        assert(len(self.dc[1].listCompute()) == 0)
+        self.assertTrue(len(self.dc[0].listCompute()) == 0)
+        self.assertTrue(len(self.dc[1].listCompute()) == 0)
         # stop Mininet network
         self.stopNet()
 
diff --git a/src/emuvim/test/test_resourcemodel_api.py b/src/emuvim/test/test_resourcemodel_api.py
index 3412ec4..9b1a3ec 100644
--- a/src/emuvim/test/test_resourcemodel_api.py
+++ b/src/emuvim/test/test_resourcemodel_api.py
@@ -6,21 +6,32 @@
 
 
 class testResourceModel(SimpleTestTopology):
+    """
+    Test the general resource model API and functionality.
+    """
 
     def testBaseResourceModelApi(self):
+        """
+        Tast bare API without real resource madel.
+        :return:
+        """
         r = BaseResourceModel()
         # check if default flavors are there
-        assert(len(r._flavors) == 5)
+        self.assertTrue(len(r._flavors) == 5)
         # check addFlavor functionality
         f = ResourceFlavor("test", {"testmetric": 42})
         r.addFlavour(f)
-        assert("test" in r._flavors)
-        assert(r._flavors.get("test").get("testmetric") == 42)
+        self.assertTrue("test" in r._flavors)
+        self.assertTrue(r._flavors.get("test").get("testmetric") == 42)
         # test if allocate and free runs through
-        assert(len(r.allocate("testc", "tiny")) == 3)  # expected: 3tuple
-        assert(r.free("testc"))
+        self.assertTrue(len(r.allocate("testc", "tiny")) == 3)  # expected: 3tuple
+        self.assertTrue(r.free("testc"))
 
     def testAddRmToDc(self):
+        """
+        Test is allocate/free is called when a RM is added to a DC.
+        :return:
+        """
         # create network
         self.createNet(nswitches=0, ndatacenter=1, nhosts=2, ndockers=0)
         # setup links
@@ -32,23 +43,23 @@
         # start Mininet network
         self.startNet()
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 0)
-        assert(len(self.net.hosts) == 2)
-        assert(len(self.net.switches) == 1)
+        self.assertTrue(len(self.getDockernetContainers()) == 0)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 1)
         # check resource model and resource model registrar
-        assert(self.dc[0]._resource_model is not None)
-        assert(len(self.net.rm_registrar.resource_models) == 1)
+        self.assertTrue(self.dc[0]._resource_model is not None)
+        self.assertTrue(len(self.net.rm_registrar.resource_models) == 1)
 
         # check if alloc was called during startCompute
-        assert(len(r.allocated_compute_instances) == 0)
+        self.assertTrue(len(r.allocated_compute_instances) == 0)
         self.dc[0].startCompute("tc1")
         time.sleep(1)
-        assert(len(r.allocated_compute_instances) == 1)
+        self.assertTrue(len(r.allocated_compute_instances) == 1)
         # check if free was called during stopCompute
         self.dc[0].stopCompute("tc1")
-        assert(len(r.allocated_compute_instances) == 0)
+        self.assertTrue(len(r.allocated_compute_instances) == 0)
         # check connectivity by using ping
-        assert(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
+        self.assertTrue(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
         # stop Mininet network
         self.stopNet()
 
@@ -57,7 +68,12 @@
     """
     Test the UpbSimpleCloudDc resource model.
     """
+
     def testAllocation(self):
+        """
+        Test the allocation procedures and correct calculations.
+        :return:
+        """
         # config
         E_CPU = 1.0
         MAX_CU = 100
@@ -67,29 +83,29 @@
         reg.register("test_dc", rm)
 
         res = rm.allocate("c1", "tiny")  # calculate allocation
-        assert(res[0] == E_CPU / MAX_CU * 1)   # validate compute result
-        assert(res[1] < 0)   # validate memory result
-        assert(res[2] < 0)   # validate disk result
+        self.assertTrue(res[0] == E_CPU / MAX_CU * 1)   # validate compute result
+        self.assertTrue(res[1] < 0)   # validate memory result
+        self.assertTrue(res[2] < 0)   # validate disk result
 
         res = rm.allocate("c2", "small")  # calculate allocation
-        assert(res[0] == E_CPU / MAX_CU * 4)   # validate compute result
-        assert(res[1] < 0)   # validate memory result
-        assert(res[2] < 0)   # validate disk result
+        self.assertTrue(res[0] == E_CPU / MAX_CU * 4)   # validate compute result
+        self.assertTrue(res[1] < 0)   # validate memory result
+        self.assertTrue(res[2] < 0)   # validate disk result
 
         res = rm.allocate("c3", "medium")  # calculate allocation
-        assert(res[0] == E_CPU / MAX_CU * 8)   # validate compute result
-        assert(res[1] < 0)   # validate memory result
-        assert(res[2] < 0)   # validate disk result
+        self.assertTrue(res[0] == E_CPU / MAX_CU * 8)   # validate compute result
+        self.assertTrue(res[1] < 0)   # validate memory result
+        self.assertTrue(res[2] < 0)   # validate disk result
 
         res = rm.allocate("c4", "large")  # calculate allocation
-        assert(res[0] == E_CPU / MAX_CU * 16)   # validate compute result
-        assert(res[1] < 0)   # validate memory result
-        assert(res[2] < 0)   # validate disk result
+        self.assertTrue(res[0] == E_CPU / MAX_CU * 16)   # validate compute result
+        self.assertTrue(res[1] < 0)   # validate memory result
+        self.assertTrue(res[2] < 0)   # validate disk result
 
         res = rm.allocate("c5", "xlarge")  # calculate allocation
-        assert(res[0] == E_CPU / MAX_CU * 32)   # validate compute result
-        assert(res[1] < 0)   # validate memory result
-        assert(res[2] < 0)   # validate disk result
+        self.assertTrue(res[0] == E_CPU / MAX_CU * 32)   # validate compute result
+        self.assertTrue(res[1] < 0)   # validate memory result
+        self.assertTrue(res[2] < 0)   # validate disk result
 
         # test over provisioning exeption
         exception = False
@@ -99,11 +115,15 @@
             rm.allocate("c8", "xlarge")  # calculate allocation
             rm.allocate("c9", "xlarge")  # calculate allocation
         except Exception as e:
-            assert("Not enough compute" in e.message)
+            self.assertTrue("Not enough compute" in e.message)
             exception = True
-        assert(exception)
+        self.assertTrue(exception)
 
     def testFree(self):
+        """
+        Test the free procedure.
+        :return:
+        """
         # config
         E_CPU = 1.0
         MAX_CU = 100
@@ -112,9 +132,49 @@
         rm = UpbSimpleCloudDcRM(max_cu=100, max_mu=100)
         reg.register("test_dc", rm)
         rm.allocate("c1", "tiny")  # calculate allocation
-        assert(rm.dc_alloc_cu == 1)
+        self.assertTrue(rm.dc_alloc_cu == 1)
         rm.free("c1")
-        assert(rm.dc_alloc_cu == 0)
+        self.assertTrue(rm.dc_alloc_cu == 0)
+
+    def testInRealTopo(self):
+        """
+        Start a real container and check if limitations are really passed down to Dockernet.
+        :return:
+        """
+        # create network
+        self.createNet(nswitches=0, ndatacenter=1, nhosts=2, ndockers=0)
+        # setup links
+        self.net.addLink(self.dc[0], self.h[0])
+        self.net.addLink(self.h[1], self.dc[0])
+        # add resource model
+        r = UpbSimpleCloudDcRM(max_cu=100, max_mu=100)
+        self.dc[0].assignResourceModel(r)
+        # start Mininet network
+        self.startNet()
+        # check number of running nodes
+        self.assertTrue(len(self.getDockernetContainers()) == 0)
+        self.assertTrue(len(self.net.hosts) == 2)
+        self.assertTrue(len(self.net.switches) == 1)
+        # check resource model and resource model registrar
+        self.assertTrue(self.dc[0]._resource_model is not None)
+        self.assertTrue(len(self.net.rm_registrar.resource_models) == 1)
+
+        # check if alloc was called during startCompute
+        self.assertTrue(len(r.allocated_compute_instances) == 0)
+        tc1 = self.dc[0].startCompute("tc1", flavor_name="tiny")
+        time.sleep(1)
+        self.assertTrue(len(r.allocated_compute_instances) == 1)
+
+        # check if there is a real limitation set for containers cgroup
+        self.assertEqual(tc1.cpu_period/tc1.cpu_quota, 100)
+
+        # check if free was called during stopCompute
+        self.dc[0].stopCompute("tc1")
+        self.assertTrue(len(r.allocated_compute_instances) == 0)
+        # check connectivity by using ping
+        self.assertTrue(self.net.ping([self.h[0], self.h[1]]) <= 0.0)
+        # stop Mininet network
+        self.stopNet()
 
 
 
diff --git a/src/emuvim/test/test_sonata_dummy_gatekeeper.py b/src/emuvim/test/test_sonata_dummy_gatekeeper.py
index b7ba371..ce5bcbf 100644
--- a/src/emuvim/test/test_sonata_dummy_gatekeeper.py
+++ b/src/emuvim/test/test_sonata_dummy_gatekeeper.py
@@ -54,14 +54,14 @@
         self.assertEqual(len(r4.json().get("service_instance_list")), 1)
 
         # check number of running nodes
-        assert(len(self.getDockernetContainers()) == 3)
-        assert(len(self.net.hosts) == 5)
-        assert(len(self.net.switches) == 2)
+        self.assertTrue(len(self.getDockernetContainers()) == 3)
+        self.assertTrue(len(self.net.hosts) == 5)
+        self.assertTrue(len(self.net.switches) == 2)
         # check compute list result
-        assert(len(self.dc[0].listCompute()) == 3)
+        self.assertTrue(len(self.dc[0].listCompute()) == 3)
         # check connectivity by using ping
         for vnf in self.dc[0].listCompute():
-            assert(self.net.ping([self.h[0], vnf]) <= 0.0)
+            self.assertTrue(self.net.ping([self.h[0], vnf]) <= 0.0)
         # stop Mininet network
         self.stopNet()