gnu: python-sadisplay: Update to 0.4.9.

* gnu/packages/databases.scm (python-sadisplay): Update to 0.4.9.
[arguments]: New field.  Override check phase.
[native-inputs]: Remove PYTHON-NOSE.  Add PYTHON-PYTEST.

gnu/packages/databases.scm

@@ -3317,20 +3317,31 @@ designed to be easy and intuitive to use.")
 (define-public python-sadisplay
   (package
     (name "python-sadisplay")
-    (version "0.4.8")
+    (version "0.4.9")
     (source
       (origin
         (method url-fetch)
         (uri (pypi-uri "sadisplay" version))
       (sha256
         (base32
-          "01d9lxhmgpb68gy8rd6zj6fcwp84n2qq210n1qsk3qbsir79bzh4"))))
+          "15jxwgla3q4xsp6rw8inqaiy1kdzc8l2cixj8amqcf0ji47icrxg"))))
     (build-system python-build-system)
+    (arguments
+     '(#:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda* (#:key tests? #:allow-other-keys)
+                      (if tests?
+                          (begin
+                            (setenv "PYTHONPATH"
+                                    (string-append ".:" (or (getenv "PYTHONPATH")
+                                                           "")))
+                            (invoke "pytest" "-vv"))
+                          (format #t "test suite not run~%")))))))
     (propagated-inputs
       `(("python-sqlalchemy" ,python-sqlalchemy)))
     (native-inputs
      ;; For tests.
-      `(("python-nose" ,python-nose)))
+      `(("python-pytest" ,python-pytest)))
     (home-page "https://bitbucket.org/estin/sadisplay")
     (synopsis "SQLAlchemy schema displayer")
     (description "This package provides a program to build Entity