maint: improves ip_address module

- uses Python's powerful inbuilt `ipaddress` library
- CIDR validation is now default via func argument
- compiles ip address test cases into a single module
- fixes bad `poetry.lock` file

**Related items**

*Issues*

- Closes #152

*PRs*

- Closes #91
- Closes #158

Author: yozachar

poetry.lock

@@ -0,0 +1,103 @@
+"""Test IP Address."""
+# -*- coding: utf-8 -*-
+
+# external
+import pytest
+
+# local
+from validators import ipv4, ipv6, ValidationFailure
+
+
+@pytest.mark.parametrize(
+    ("address",),
+    [
+        ("127.0.0.1",),
+        ("123.5.77.88",),
+        ("12.12.12.12",),
+        # w/ cidr
+        ("127.0.0.1/0",),
+        ("123.5.77.88/8",),
+        ("12.12.12.12/32",),
+    ],
+)
+def test_returns_true_on_valid_ipv4_address(address: str):
+    """Test returns true on valid ipv4 address."""
+    assert ipv4(address)
+    assert not ipv6(address)
+
+
+@pytest.mark.parametrize(
+    ("address",),
+    [
+        # leading zeroes error-out from Python 3.9.5
+        # ("100.100.033.033",),
+        ("900.200.100.75",),
+        ("0127.0.0.1",),
+        ("abc.0.0.1",),
+        # w/ cidr
+        ("1.1.1.1/-1",),
+        ("1.1.1.1/33",),
+        ("1.1.1.1/foo",),
+    ],
+)
+def test_returns_failed_validation_on_invalid_ipv4_address(address: str):
+    """Test returns failed validation on invalid ipv4 address."""
+    assert isinstance(ipv4(address), ValidationFailure)
+
+
+@pytest.mark.parametrize(
+    ("address",),
+    [
+        ("::",),
+        ("::1",),
+        ("1::",),
+        ("dead:beef:0:0:0:0000:42:1",),
+        ("abcd:ef::42:1",),
+        ("0:0:0:0:0:ffff:1.2.3.4",),
+        ("::192.168.30.2",),
+        ("0000:0000:0000:0000:0000::",),
+        ("0:a:b:c:d:e:f::",),
+        # w/ cidr
+        ("::1/128",),
+        ("::1/0",),
+        ("dead:beef:0:0:0:0:42:1/8",),
+        ("abcd:ef::42:1/32",),
+        ("0:0:0:0:0:ffff:1.2.3.4/16",),
+        ("2001:0db8:85a3:0000:0000:8a2e:0370:7334/64",),
+        ("::192.168.30.2/128",),
+    ],
+)
+def test_returns_true_on_valid_ipv6_address(address: str):
+    """Test returns true on valid ipv6 address."""
+    assert ipv6(address)
+    assert not ipv4(address)
+
+
+@pytest.mark.parametrize(
+    ("address",),
+    [
+        ("abc.0.0.1",),
+        ("abcd:1234::123::1",),
+        ("1:2:3:4:5:6:7:8:9",),
+        ("1:2:3:4:5:6:7:8::",),
+        ("1:2:3:4:5:6:7::8:9",),
+        ("abcd::1ffff",),
+        ("1111:",),
+        (":8888",),
+        (":1.2.3.4",),
+        ("18:05",),
+        (":",),
+        (":1:2:",),
+        (":1:2::",),
+        ("::1:2::",),
+        ("8::1:2::9",),
+        ("02001:0000:1234:0000:0000:C1C0:ABCD:0876",),
+        # w/ cidr
+        ("::1/129",),
+        ("::1/-1",),
+        ("::1/foo",),
+    ],
+)
+def test_returns_failed_validation_on_invalid_ipv6_address(address: str):
+    """Test returns failed validation on invalid ipv6 address."""
+    assert isinstance(ipv6(address), ValidationFailure)

tests/test_ip_address.py

@@ -9,7 +9,7 @@
 from .hashes import md5, sha1, sha224, sha256, sha512
 from .i18n import fi_business_id, fi_ssn
 from .iban import iban
-from .ip_address import ipv4, ipv4_cidr, ipv6, ipv6_cidr
+from .ip_address import ipv4, ipv6
 from .length import length
 from .mac_address import mac_address
 from .slug import slug
@@ -29,9 +29,7 @@
     "fi_business_id",
     "fi_ssn",
     "iban",
-    "ipv4_cidr",
     "ipv4",
-    "ipv6_cidr",
     "ipv6",
     "jcb",
     "length",