port tests to unittest

test.py

-import pytest
+import unittest
 
 from castellum_pseudonyms import clean, generate
 
 
-@pytest.mark.unittest
-def test_clean_generated():
-    clean(generate())
+class TestPseudonyms(unittest.TestCase):
+    def test_clean_generated(self):
+        clean(generate())
 
+    def test_clean_invalid_checksum(self):
+        with self.assertRaises(ValueError) as cm:
+            clean('foo')
+        self.assertNotIn('invalid characters', str(cm.exception))
 
-@pytest.mark.unittest
-def test_clean_invalid_checksum():
-    with pytest.raises(ValueError) as excinfo:
-        clean('foo')
-    assert 'invalid characters' not in str(excinfo.value)
+    def test_clean_invalid_chars(self):
+        with self.assertRaises(ValueError) as cm:
+            clean('ABC!')
+        self.assertIn('invalid characters', str(cm.exception))
 
+    def test_check_denormalized(self):
+        self.assertEqual(clean('vg83END03T'), 'VG83END03T')
+        self.assertEqual(clean('VG83ENDO3T'), 'VG83END03T')
 
-@pytest.mark.unittest
-def test_clean_invalid_chars():
-    with pytest.raises(ValueError) as excinfo:
-        clean('ABC!')
-    assert 'invalid characters' in str(excinfo.value)
 
-
-@pytest.mark.unittest
-def test_check_denormalized():
-    assert clean('vg83END03T') == 'VG83END03T'
-    assert clean('VG83ENDO3T') == 'VG83END03T'
+if __name__ == '__main__':
+    unittest.main()