python3Packages.jupyterhub: enable tests

pkgs/development/python-modules/jupyterhub/default.nix

@@ -18,6 +18,13 @@
 , tornado
 , traitlets
 , nodePackages
+, beautifulsoup4
+, cryptography
+, notebook
+, pytest-asyncio
+, pytestCheckHook
+, requests-mock
+, virtualenv
 }:
 
 let
@@ -120,9 +127,28 @@ buildPythonPackage rec {
     traitlets
   ];
 
-  # Disable tests because they take an excessive amount of time to complete.
+  preCheck = ''
-  doCheck = false;
+    substituteInPlace jupyterhub/tests/test_spawner.py --replace \
+      "'jupyterhub-singleuser'" "'$out/bin/jupyterhub-singleuser'"
+  '';
 
+  checkInputs = [
+    # https://github.com/jupyterhub/jupyterhub/blob/master/dev-requirements.txt
+    beautifulsoup4
+    cryptography
+    notebook
+    pytest-asyncio
+    pytestCheckHook
+    requests-mock
+    virtualenv
+  ];
+
+  disabledTests = [
+    # Tries to install older versions through pip
+    "test_upgrade"
+    # Testcase fails to find requests import
+    "test_external_service"
+  ];
 
   meta = with lib; {
     description = "Serves multiple Jupyter notebook instances";