Add support for running pytest in parallel

dnas/requirements.txt

@@ -10,7 +10,8 @@ mypy==1.6.1
 oauthlib==3.2.2
 packaging==23.2
 pyparsing==3.0.9
-pytest==7.4.2
+pytest==8.3.3
+pytest-xdist==3.6.1
 redis==4.4.4
 requests==2.32.0
 requests-oauthlib==1.3.1

dnas/tests/test_git.py

@@ -6,14 +6,22 @@
 import sys
 import unittest
 
+import pytest
+
 sys.path.append(
     os.path.join(os.path.dirname(os.path.realpath(__file__)), "../")
 )
 from dnas.config import config
 from dnas.git import git
 
 
+@pytest.mark.sequential_tests
 class test_git(unittest.TestCase):
+    """
+    The git tests must be run sequential, using a pytest marker to exclude
+    from parallel tests.
+    """
+
     cfg = config()
     g = git()
     test_filename = "abc123"

dnas/tests/test_mrt_stats.py

@@ -5,6 +5,8 @@
 import sys
 import unittest
 
+import pytest
+
 sys.path.append(
     os.path.join(os.path.dirname(os.path.realpath(__file__)), "../")
 )
@@ -14,7 +16,14 @@
 from dnas.mrt_stats import mrt_stats
 
 
+@pytest.mark.sequential_tests
 class test_mrt_stats(unittest.TestCase):
+    """
+    Run these tests sequentially. When run in parallel,
+    setUp() doesn't finish before the unit tests run so they fail.
+    Probably something that can be fixed in the future.
+    """
+
     def setUp(self: "test_mrt_stats") -> None:
         """
         Copy the test files to the location they would be in,
@@ -122,15 +131,15 @@ def setUp(self: "test_mrt_stats") -> None:
             "RRC1/",
             self.upd_5_fn + ".json",
         )
-        if not os.path.isfile(self.upd_3_json):
+        if not os.path.isfile(self.upd_5_json):
             raise Exception(
-                f"Test stats JSON dump is not found: {self.upd_3_json}"
+                f"Test stats JSON dump is not found: {self.upd_5_json}"
             )
 
         self.upd_1_test = os.path.join(
             os.path.dirname(os.path.realpath(__file__)),
             "RRC23/",
-            "rrc23.updates.20220421.0200.gz.test",
+            f"{self.upd_1_fn}.test",
         )
 
     def test_init(self: "test_mrt_stats") -> None:

tox.ini

@@ -39,7 +39,8 @@ deps = {[testenv]deps}
 passenv = *
 changedir = {toxinidir}
 commands =
-    pytest -vvvv dnas/tests/ {posargs}
+    pytest -vvvv -n 4 -m "not sequential_tests" dnas/tests/ {posargs}
+    pytest -vvvv -m "sequential_tests" dnas/tests/ {posargs}
 
 [testenv:shellcheck]
 skip_install=true