Move modules and module_utils unit tests to correct place (#81)

* Move modules and module_utils unit tests to correct place.

* Update ignore.txt

* Fix imports.

* Fix typos.

* Fix more typos.

tests/unit/plugins/modules/test_docker_network.py

@@ -0,0 +1,31 @@
+"""Unit tests for docker_network."""
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import pytest
+
+from ansible_collections.community.docker.plugins.modules.docker_network import validate_cidr
+
+
+@pytest.mark.parametrize("cidr,expected", [
+    ('192.168.0.1/16', 'ipv4'),
+    ('192.168.0.1/24', 'ipv4'),
+    ('192.168.0.1/32', 'ipv4'),
+    ('fdd1:ac8c:0557:7ce2::/64', 'ipv6'),
+    ('fdd1:ac8c:0557:7ce2::/128', 'ipv6'),
+])
+def test_validate_cidr_positives(cidr, expected):
+    assert validate_cidr(cidr) == expected
+
+
+@pytest.mark.parametrize("cidr", [
+    '192.168.0.1',
+    '192.168.0.1/34',
+    '192.168.0.1/asd',
+    'fdd1:ac8c:0557:7ce2::',
+])
+def test_validate_cidr_negatives(cidr):
+    with pytest.raises(ValueError) as e:
+        validate_cidr(cidr)
+    assert '"{0}" is not a valid CIDR'.format(cidr) == str(e.value)