tests: convert util.pathprefix2dict tests from unittest to pytest

tests/unittests/test_pathprefix2dict.py

@@ -1,43 +1,40 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-import shutil
-import tempfile
+import pytest
 
 from cloudinit import util
-from tests.unittests.helpers import TestCase, populate_dir
+from tests.unittests.helpers import populate_dir
 
 
-class TestPathPrefix2Dict(TestCase):
-    def setUp(self):
-        super(TestPathPrefix2Dict, self).setUp()
-        self.tmp = tempfile.mkdtemp()
-        self.addCleanup(shutil.rmtree, self.tmp)
-
-    def test_required_only(self):
+class TestPathPrefix2Dict:
+    def test_required_only(self, tmp_path):
         dirdata = {"f1": b"f1content", "f2": b"f2content"}
-        populate_dir(self.tmp, dirdata)
+        populate_dir(str(tmp_path), dirdata)
 
-        ret = util.pathprefix2dict(self.tmp, required=["f1", "f2"])
-        self.assertEqual(dirdata, ret)
+        ret = util.pathprefix2dict(str(tmp_path), required=["f1", "f2"])
+        assert dirdata == ret
 
-    def test_required_missing(self):
+    def test_required_missing(self, tmp_path):
         dirdata = {"f1": b"f1content"}
-        populate_dir(self.tmp, dirdata)
+        populate_dir(str(tmp_path), dirdata)
         kwargs = {"required": ["f1", "f2"]}
-        self.assertRaises(ValueError, util.pathprefix2dict, self.tmp, **kwargs)
+        with pytest.raises(ValueError):
+            util.pathprefix2dict(str(tmp_path), **kwargs)
 
-    def test_no_required_and_optional(self):
+    def test_no_required_and_optional(self, tmp_path):
         dirdata = {"f1": b"f1c", "f2": b"f2c"}
-        populate_dir(self.tmp, dirdata)
+        populate_dir(str(tmp_path), dirdata)
 
         ret = util.pathprefix2dict(
-            self.tmp, required=None, optional=["f1", "f2"]
+            str(tmp_path), required=None, optional=["f1", "f2"]
         )
-        self.assertEqual(dirdata, ret)
+        assert dirdata == ret
 
-    def test_required_and_optional(self):
+    def test_required_and_optional(self, tmp_path):
         dirdata = {"f1": b"f1c", "f2": b"f2c"}
-        populate_dir(self.tmp, dirdata)
+        populate_dir(str(tmp_path), dirdata)
 
-        ret = util.pathprefix2dict(self.tmp, required=["f1"], optional=["f2"])
-        self.assertEqual(dirdata, ret)
+        ret = util.pathprefix2dict(
+            str(tmp_path), required=["f1"], optional=["f2"]
+        )
+        assert dirdata == ret