Added a few more tests to improve code coverage

Author: lightswitch05

tests/mocked-dns-answers.json

@@ -129,7 +129,7 @@
    "type": "A",
    "class": "IN"
   },
-  "answer": []
+  "answer": ["127.0.0.1"]
  },
  {
   "query": {
@@ -139,6 +139,30 @@
   },
   "answer": []
  },
+ {
+  "query": {
+   "name": "ipv6only.joshdata.me",
+   "type": "MX",
+   "class": "IN"
+  },
+  "answer": []
+ },
+ {
+  "query": {
+   "name": "ipv6only.joshdata.me",
+   "type": "A",
+   "class": "IN"
+  },
+  "answer": []
+ },
+ {
+  "query": {
+   "name": "ipv6only.joshdata.me",
+   "type": "AAAA",
+   "class": "IN"
+  },
+  "answer": ["::1"]
+ },
  {
   "query": {
    "name": "mail.example",

tests/test_deliverability.py

@@ -35,6 +35,7 @@ def test_deliverability_found(domain: str, expected_response: str) -> None:
         # No MX or A/AAAA records, but some other DNS records must
         # exist such that the response is NOANSWER instead of NXDOMAIN.
         ('justtxt.joshdata.me', 'The domain name {domain} does not accept email'),
+        ('ipv6only.joshdata.me', 'The domain name {domain} does not accept email'),
     ],
 )
 def test_deliverability_fails(domain: str, error: str) -> None:
@@ -65,6 +66,11 @@ def test_deliverability_dns_timeout() -> None:
     assert response.get("unknown-deliverability") == "timeout"
 
 
+def test_timeout_and_resolver() -> None:
+    with pytest.raises(ValueError, match="It's not valid to pass both timeout and dns_resolver."):
+        validate_email_deliverability('timeout.com', 'timeout.com', timeout=1, dns_resolver=RESOLVER)
+
+
 @pytest.mark.network
 def test_caching_dns_resolver() -> None:
     class TestCache:

tests/test_main.py

@@ -16,6 +16,14 @@ def test_dict_accessor() -> None:
     assert valid_email.as_dict()["original"] == input_email
 
 
+def test_dict_accessor_with_domain_address() -> None:
+    input_email = "me@[127.0.0.1]"
+    valid_email = validate_email(input_email, check_deliverability=False, allow_domain_literal=True)
+    assert valid_email.domain == "[127.0.0.1]"
+    assert isinstance(valid_email.as_dict(), dict)
+    assert valid_email.as_dict()["domain_address"] == '"IPv4Address(\'127.0.0.1\')"'
+
+
 def test_main_single_good_input(monkeypatch: pytest.MonkeyPatch, capsys: pytest.CaptureFixture[str]) -> None:
     import json
     test_email = "google@google.com"
@@ -65,3 +73,21 @@ def test_deprecation() -> None:
     valid_email = validate_email(input_email, check_deliverability=False)
     with pytest.deprecated_call():
         assert valid_email.email is not None
+
+
+@pytest.mark.parametrize('invalid_email', [
+    None,
+    12345,
+    [],
+    {},
+    lambda x: x,
+])
+def test_invalid_type(invalid_email) -> None:
+    with pytest.raises(TypeError, match="email must be str or bytes"):
+        validate_email(invalid_email, check_deliverability=False)
+
+
+def test_invalid_ascii() -> None:
+    invalid_email = b'\xd0\xba\xd0\xb2\xd1\x96\xd1\x82\xd0\xbe\xd1\x87\xd0\xba\xd0\xb0@\xd0\xbf\xd0\xbe\xd1\x88\xd1\x82\xd0\xb0.test'
+    with pytest.raises(EmailSyntaxError, match="The email address is not valid ASCII."):
+        validate_email(invalid_email, check_deliverability=False)