Fix tests creating garbage project in ~/GNS3/project

tests/conftest.py

@@ -107,7 +107,11 @@ def free_console_port(request, port_manager):
 
 
 @pytest.yield_fixture(autouse=True)
-def run_around_tests():
+def run_around_tests(monkeypatch):
+    """
+    This setup a temporay project file environnement around tests
+    """
+
     tmppath = tempfile.mkdtemp()
 
     config = Config.instance()
@@ -115,6 +119,8 @@ def run_around_tests():
     server_section["project_directory"] = tmppath
     config.set_section_config("Server", server_section)
 
+    monkeypatch.setattr("gns3server.modules.project.Project._get_default_project_directory", lambda *args: tmppath)
+
     yield
 
     # An helper should not raise Exception

tests/modules/test_project.py

@@ -198,8 +198,9 @@ def test_project_close_temporary_project(loop, manager):
     assert os.path.exists(directory) is False
 
 
-def test_get_default_project_directory():
+def test_get_default_project_directory(monkeypatch):
 
+    monkeypatch.undo()
     project = Project()
     path = os.path.normpath(os.path.expanduser("~/GNS3/projects"))
     assert project._get_default_project_directory() == path