Add test + release notes

AUTHORS.rst

@@ -79,6 +79,7 @@ their individual contributions.
 * `James Lamb <https://github.com/jameslamb>`_
 * `Jenny Rouleau <https://github.com/jennyrou>`_
 * `Jens Heinrich <https://github.com/JensHeinrich>`_
+* `Jens Tröger <https://github.com/jenstroeger>`_
 * `Jeremy Thurgood <https://github.com/jerith>`_
 * `J.J. Green <http://soliton.vm.bytemark.co.uk/pub/jjg/>`_
 * `JP Viljoen <https://github.com/froztbyte>`_ (froztbyte@froztbyte.net)

hypothesis-python/RELEASE.rst

@@ -0,0 +1,8 @@
+RELEASE_TYPE: minor
+
+This release adds an optional ``domains=`` parameter to the
+:func:`~hypothesis.strategies.emails` strategy, and excludes
+the special-use :wikipedia:`.arpa` domain from the default
+strategy (:issue:`3567`).
+
+Thanks to Jens Tröger for reporting and fixing this bug!

hypothesis-python/tests/nocover/test_emails.py

@@ -9,13 +9,19 @@
 # obtain one at https://mozilla.org/MPL/2.0/.
 
 from hypothesis import given
-from hypothesis.strategies import emails
+from hypothesis.strategies import emails, just
 
 
 @given(emails())
-def test_is_valid_email(address):
+def test_is_valid_email(address: str):
     local, at_, domain = address.rpartition("@")
     assert len(address) <= 254
     assert at_ == "@"
     assert local
     assert domain
+    assert not domain.lower().endswith(".arpa")
+
+
+@given(emails(domains=just("mydomain.com")))
+def test_can_restrict_email_domains(address: str):
+    assert address.endswith("@mydomain.com")