pythonPackages.cyclonedx-python-lib: fix checkPhase

The unit tests for this package require the tests directory to be on the
PYTHONPATH. We also can switch to pytest to run most of the
TestOutputJson test cases, explicitly disabling the few that require
network access.

pkgs/development/python-modules/cyclonedx-python-lib/default.nix

@@ -6,6 +6,7 @@
 , lxml
 , packageurl-python
 , poetry-core
+, pytestCheckHook
 , python
 , pythonOlder
 , requirements-parser
@@ -14,7 +15,6 @@
 , toml
 , types-setuptools
 , types-toml
-, unittestCheckHook
 , xmldiff
 }:
 
@@ -48,7 +48,7 @@ buildPythonPackage rec {
   ];
 
   checkInputs = [
-    unittestCheckHook
+    pytestCheckHook
     jsonschema
     lxml
     xmldiff
@@ -59,9 +59,17 @@ buildPythonPackage rec {
   ];
 
   preCheck = ''
-    rm tests/test_output_json.py
+    export PYTHONPATH=tests''${PYTHONPATH+:$PYTHONPATH}
   '';
 
+  pytestFlagsArray = [ "tests/" ];
+
+  disabledTests = [
+    # These tests require network access.
+    "test_bom_v1_3_with_metadata_component"
+    "test_bom_v1_4_with_metadata_component"
+  ];
+
   meta = with lib; {
     description = "Python library for generating CycloneDX SBOMs";
     homepage = "https://github.com/CycloneDX/cyclonedx-python-lib";