VPCS is trully async

docs/api/examples/post_vpcs.txt

@@ -20,5 +20,5 @@ X-ROUTE: /vpcs
     "name": "PC TEST 1",
     "project_uuid": "a1e920ca-338a-4e9f-b363-aa607b09dd80",
     "script_file": null,
-    "uuid": "12171ed6-4234-4ba7-9ef5-db3631a3a2e4"
+    "uuid": "a4809caf-bfba-4f34-ad78-1d054c8b7e5a"
 }

gns3server/modules/vpcs/vpcs_vm.py

@@ -80,6 +80,7 @@ class VPCSVM(BaseVM):
     def __del__(self):
         self._kill_process()
 
+    @asyncio.coroutine
     def _check_requirements(self):
         """
         Check if VPCS is available with the correct version
@@ -97,7 +98,7 @@ class VPCSVM(BaseVM):
         if not os.access(self._path, os.X_OK):
             raise VPCSError("VPCS program '{}' is not executable".format(self._path))
 
-        self._check_vpcs_version()
+        yield from self._check_vpcs_version()
 
     def __json__(self):
 
@@ -144,14 +145,14 @@ class VPCSVM(BaseVM):
                                                                       new_name=new_name))
         BaseVM.name = new_name
 
+    @asyncio.coroutine
     def _check_vpcs_version(self):
         """
         Checks if the VPCS executable version is >= 0.5b1.
         """
-        # TODO: should be async
         try:
-            output = subprocess.check_output([self._path, "-v"], cwd=self.working_dir)
-            match = re.search("Welcome to Virtual PC Simulator, version ([0-9a-z\.]+)", output.decode("utf-8"))
+            output = yield from self._get_vpcs_welcome()
+            match = re.search("Welcome to Virtual PC Simulator, version ([0-9a-z\.]+)", output)
             if match:
                 version = match.group(1)
                 if parse_version(version) < parse_version("0.5b1"):
@@ -161,13 +162,19 @@ class VPCSVM(BaseVM):
         except (OSError, subprocess.SubprocessError) as e:
             raise VPCSError("Error while looking for the VPCS version: {}".format(e))
 
+    @asyncio.coroutine
+    def _get_vpcs_welcome(self):
+        proc = yield from asyncio.create_subprocess_exec(' '.join([self._path, "-v"]), stdout=asyncio.subprocess.PIPE, cwd=self.working_dir)
+        out = yield from proc.stdout.readline()
+        return out.decode("utf-8")
+
     @asyncio.coroutine
     def start(self):
         """
         Starts the VPCS process.
         """
 
-        self._check_requirements()
+        yield from self._check_requirements()
 
         if not self.is_running():
             if not self._ethernet_adapter.get_nio(0):

tests/api/test_vpcs.py

@@ -84,3 +84,13 @@ def test_vpcs_delete_nio(server, vm):
     response = server.delete("/vpcs/{}/ports/0/nio".format(vm["uuid"]), example=True)
     assert response.status == 200
     assert response.route == "/vpcs/{uuid}/ports/{port_id}/nio"
+
+
+def test_vpcs_start():
+    # assert True == False
+    pass
+
+
+def test_vpcs_stop():
+    # assert True == False
+    pass

tests/modules/vpcs/test_vpcs_vm.py

@@ -36,15 +36,14 @@ def manager():
     return m
 
 
-@patch("subprocess.check_output", return_value="Welcome to Virtual PC Simulator, version 0.6".encode("utf-8"))
 def test_vm(project, manager):
     vm = VPCSVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", project, manager)
     assert vm.name == "test"
     assert vm.uuid == "00010203-0405-0607-0809-0a0b0c0d0e0f"
 
 
-@patch("subprocess.check_output", return_value="Welcome to Virtual PC Simulator, version 0.1".encode("utf-8"))
 def test_vm_invalid_vpcs_version(project, manager, loop):
+    with asyncio_patch("gns3server.modules.vpcs.vpcs_vm.VPCSVM._get_vpcs_welcome", return_value="Welcome to Virtual PC Simulator, version 0.1"):
         with pytest.raises(VPCSError):
             vm = VPCSVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", project, manager)
             loop.run_until_complete(asyncio.async(vm.start()))
@@ -61,8 +60,8 @@ def test_vm_invalid_vpcs_path(project, manager, loop):
         assert vm.uuid == "00010203-0405-0607-0809-0a0b0c0d0e0f"
 
 
-@patch("gns3server.modules.vpcs.vpcs_vm.VPCSVM._check_requirements", return_value=True)
 def test_start(project, loop, manager):
+    with asyncio_patch("gns3server.modules.vpcs.vpcs_vm.VPCSVM._check_requirements", return_value=True):
         with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()):
             vm = VPCSVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", project, manager)
             nio = vm.port_add_nio_binding(0, {"type": "nio_udp", "lport": 4242, "rport": 4243, "rhost": "127.0.0.1"})
@@ -71,9 +70,9 @@ def test_start(project, loop, manager):
             assert vm.is_running()
 
 
-@patch("gns3server.modules.vpcs.vpcs_vm.VPCSVM._check_requirements", return_value=True)
 def test_stop(project, loop, manager):
     process = MagicMock()
+    with asyncio_patch("gns3server.modules.vpcs.vpcs_vm.VPCSVM._check_requirements", return_value=True):
         with asyncio_patch("asyncio.create_subprocess_exec", return_value=process):
             vm = VPCSVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", project, manager)
             nio = vm.port_add_nio_binding(0, {"type": "nio_udp", "lport": 4242, "rport": 4243, "rhost": "127.0.0.1"})