Add assertResultRaisesRegex method to TestCase

Author: Maxcode123

src/unittest_extensions/case.py

@@ -138,6 +138,14 @@ def assertResultRaises(self, expected_exception):
         with self.assertRaises(expected_exception):
             self.result()
 
+    def assertResultRaisesRegex(self, expected_exception, expected_regex):
+        """
+        Fail unless an exception of class expected_exception is raised by the
+        result and the message matches the regex.
+        """
+        with self.assertRaisesRegex(expected_exception, expected_regex):
+            self.result()
+
     def assertResultAlmost(self, value, places=None, delta=None):
         """
         Fail if the result is unequal to the value as determined by their

src/unittest_extensions/tests/test_use_case.py

@@ -1,4 +1,5 @@
 from unittest_extensions import TestCase, args
+from unittest_extensions.error import TestError
 
 
 class TestClass:
@@ -49,6 +50,18 @@ def test_add_float_to_float(self):
     def test_add_str_to_str(self):
         self.assertResult("1-3-")
 
+    @args({"a": 1, "c": 2})
+    def test_wrong_kwargs_raises(self):
+        self.assertResultRaisesRegex(
+            TestError, "Subject received an unexpected keyword argument."
+        )
+
+    @args({"a": 1})
+    def test_missing_arg_raises(self):
+        self.assertResultRaisesRegex(
+            TestError, "Subject misses 1 required positional argument."
+        )
+
 
 class TestAppend(TestCase):