python3Packages.ipython: enable tests, reformat

The infinite recursion with ipykernel was been resolved in 9e3b98531.

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

@@ -3,69 +3,79 @@
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
+
 # Build dependencies
 , glibcLocales
-# Test dependencies
-, nose
-, pygments
+
 # Runtime dependencies
-, black
-, jedi
-, decorator
-, matplotlib-inline
-, pickleshare
-, traitlets
-, prompt-toolkit
-, pexpect
 , appnope
 , backcall
+, black
+, decorator
+, jedi
+, matplotlib-inline
+, pexpect
+, pickleshare
+, prompt-toolkit
+, pygments
 , stack-data
+, traitlets
+
+# Test dependencies
+, pytestCheckHook
+, testpath
 }:
 
 buildPythonPackage rec {
   pname = "ipython";
   version = "8.0.1";
-  disabled = pythonOlder "3.7";
+  format = "pyproject";
+  disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "0x19sj4dlq7r4p1mqnpx9245r8dwvpjwd8n34snfm37a452lsmmb";
   };
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
-    substituteInPlace setup.py --replace "'gnureadline'" " "
-  '';
-
-  buildInputs = [ glibcLocales ];
-
-  checkInputs = [ nose pygments ];
+  buildInputs = [
+    glibcLocales
+  ];
 
   propagatedBuildInputs = [
+    backcall
     black
-    jedi
     decorator
+    jedi
     matplotlib-inline
+    pexpect
     pickleshare
-    stack-data
-    traitlets
     prompt-toolkit
     pygments
-    pexpect
-    backcall
-  ] ++ lib.optionals stdenv.isDarwin [appnope];
+    stack-data
+    traitlets
+  ] ++ lib.optionals stdenv.isDarwin [
+    appnope
+  ];
 
   LC_ALL="en_US.UTF-8";
 
-  doCheck = false; # Circular dependency with ipykernel
-
-  checkPhase = ''
-    nosetests
-  '';
-
   pythonImportsCheck = [
     "IPython"
   ];
 
+  preCheck = ''
+    export HOME=$TMPDIR
+
+    # doctests try to fetch an image from the internet
+    substituteInPlace pytest.ini \
+      --replace "--ipdoctest-modules" "--ipdoctest-modules --ignore=IPython/core/display.py"
+  '';
+
+  checkInputs = [
+    pytestCheckHook
+    testpath
+  ];
+
   meta = with lib; {
     description = "IPython: Productive Interactive Computing";
     homepage = "http://ipython.org/";