Migrate tests to pytest (#23544)

* Migrate tests to pytest

* Fixup

* Use loop fixture in test_check_config

* Lint

tests/helpers/test_init.py

@@ -1,50 +1,35 @@
 """Test component helpers."""
 # pylint: disable=protected-access
 from collections import OrderedDict
-import unittest
 
 from homeassistant import helpers
 
-from tests.common import get_test_home_assistant
+
+def test_extract_domain_configs():
+    """Test the extraction of domain configuration."""
+    config = {
+        'zone': None,
+        'zoner': None,
+        'zone ': None,
+        'zone Hallo': None,
+        'zone 100': None,
+    }
+
+    assert set(['zone', 'zone Hallo', 'zone 100']) == \
+        set(helpers.extract_domain_configs(config, 'zone'))
 
 
-class TestHelpers(unittest.TestCase):
-    """Tests homeassistant.helpers module."""
+def test_config_per_platform():
+    """Test config per platform method."""
+    config = OrderedDict([
+        ('zone', {'platform': 'hello'}),
+        ('zoner', None),
+        ('zone Hallo', [1, {'platform': 'hello 2'}]),
+        ('zone 100', None),
+    ])
 
-    # pylint: disable=invalid-name
-    def setUp(self):
-        """Init needed objects."""
-        self.hass = get_test_home_assistant()
-
-    # pylint: disable=invalid-name
-    def tearDown(self):
-        """Stop everything that was started."""
-        self.hass.stop()
-
-    def test_extract_domain_configs(self):
-        """Test the extraction of domain configuration."""
-        config = {
-            'zone': None,
-            'zoner': None,
-            'zone ': None,
-            'zone Hallo': None,
-            'zone 100': None,
-        }
-
-        assert set(['zone', 'zone Hallo', 'zone 100']) == \
-            set(helpers.extract_domain_configs(config, 'zone'))
-
-    def test_config_per_platform(self):
-        """Test config per platform method."""
-        config = OrderedDict([
-            ('zone', {'platform': 'hello'}),
-            ('zoner', None),
-            ('zone Hallo', [1, {'platform': 'hello 2'}]),
-            ('zone 100', None),
-        ])
-
-        assert [
-            ('hello', config['zone']),
-            (None, 1),
-            ('hello 2', config['zone Hallo'][1]),
-        ] == list(helpers.config_per_platform(config, 'zone'))
+    assert [
+        ('hello', config['zone']),
+        (None, 1),
+        ('hello 2', config['zone Hallo'][1]),
+    ] == list(helpers.config_per_platform(config, 'zone'))