Avoid constant alias for integration DOMAIN (#145788)

* Avoid constant alias for integration DOMAIN

* Tweak

* Improve

* Three more

---------

Co-authored-by: Shay Levy <levyshay1@gmail.com>

pylint/plugins/hass_imports.py

@@ -233,6 +233,11 @@ class HassImportsFormatChecker(BaseChecker):
             "hass-import-constant-alias",
             "Used when a constant should be imported as an alias",
         ),
+        "W7427": (
+            "`%s` alias is unnecessary for `%s`",
+            "hass-import-constant-unnecessary-alias",
+            "Used when a constant alias is unnecessary",
+        ),
     }
     options = ()
 
@@ -274,16 +279,24 @@ class HassImportsFormatChecker(BaseChecker):
         self, current_package: str, node: nodes.ImportFrom
     ) -> None:
         """Check for improper 'from ._ import _' invocations."""
-        if node.level <= 1 or (
-            not current_package.startswith("homeassistant.components.")
-            and not current_package.startswith("tests.components.")
+        if not current_package.startswith(
+            ("homeassistant.components.", "tests.components.")
         ):
             return
+
         split_package = current_package.split(".")
+        current_component = split_package[2]
+
+        self._check_for_constant_alias(node, current_component, current_component)
+
+        if node.level <= 1:
+            # No need to check relative import
+            return
+
         if not node.modname and len(split_package) == node.level + 1:
             for name in node.names:
                 # Allow relative import to component root
-                if name[0] != split_package[2]:
+                if name[0] != current_component:
                     self.add_message("hass-absolute-import", node=node)
                     return
             return
@@ -298,6 +311,15 @@ class HassImportsFormatChecker(BaseChecker):
     ) -> bool:
         """Check for hass-import-constant-alias."""
         if current_component == imported_component:
+            # Check for `from homeassistant.components.self import DOMAIN as XYZ`
+            for name, alias in node.names:
+                if name == "DOMAIN" and (alias is not None and alias != "DOMAIN"):
+                    self.add_message(
+                        "hass-import-constant-unnecessary-alias",
+                        node=node,
+                        args=(alias, "DOMAIN"),
+                    )
+                    return False
             return True
 
         # Check for `from homeassistant.components.other import DOMAIN`

tests/components/decora/test_light.py

@@ -2,7 +2,7 @@
 
 from unittest.mock import Mock, patch
 
-from homeassistant.components.decora import DOMAIN as DECORA_DOMAIN
+from homeassistant.components.decora import DOMAIN
 from homeassistant.components.light import DOMAIN as PLATFORM_DOMAIN
 from homeassistant.const import CONF_PLATFORM
 from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, HomeAssistant
@@ -22,7 +22,7 @@ async def test_repair_issue_is_created(
         {
             PLATFORM_DOMAIN: [
                 {
-                    CONF_PLATFORM: DECORA_DOMAIN,
+                    CONF_PLATFORM: DOMAIN,
                 }
             ],
         },
@@ -30,5 +30,5 @@ async def test_repair_issue_is_created(
     await hass.async_block_till_done()
     assert (
         HOMEASSISTANT_DOMAIN,
-        f"deprecated_system_packages_yaml_integration_{DECORA_DOMAIN}",
+        f"deprecated_system_packages_yaml_integration_{DOMAIN}",
     ) in issue_registry.issues

tests/components/sms/test_init.py

@@ -24,7 +24,7 @@ async def test_repair_issue_is_created(
     """Test repair issue is created."""
     from homeassistant.components.sms import (  # pylint: disable=import-outside-toplevel
         DEPRECATED_ISSUE_ID,
-        DOMAIN as SMS_DOMAIN,
+        DOMAIN,
     )
 
     with (
@@ -33,7 +33,7 @@ async def test_repair_issue_is_created(
     ):
         config_entry = MockConfigEntry(
             title="test",
-            domain=SMS_DOMAIN,
+            domain=DOMAIN,
             data={
                 CONF_DEVICE: "/dev/ttyUSB0",
             },

tests/components/tensorflow/test_image_processing.py

@@ -3,7 +3,7 @@
 from unittest.mock import Mock, patch
 
 from homeassistant.components.image_processing import DOMAIN as IMAGE_PROCESSING_DOMAINN
-from homeassistant.components.tensorflow import CONF_GRAPH, DOMAIN as TENSORFLOW_DOMAIN
+from homeassistant.components.tensorflow import CONF_GRAPH, DOMAIN
 from homeassistant.const import CONF_ENTITY_ID, CONF_MODEL, CONF_PLATFORM, CONF_SOURCE
 from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, HomeAssistant
 from homeassistant.helpers import issue_registry as ir
@@ -22,7 +22,7 @@ async def test_repair_issue_is_created(
         {
             IMAGE_PROCESSING_DOMAINN: [
                 {
-                    CONF_PLATFORM: TENSORFLOW_DOMAIN,
+                    CONF_PLATFORM: DOMAIN,
                     CONF_SOURCE: [
                         {CONF_ENTITY_ID: "camera.test_camera"},
                     ],
@@ -36,5 +36,5 @@ async def test_repair_issue_is_created(
     await hass.async_block_till_done()
     assert (
         HOMEASSISTANT_DOMAIN,
-        f"deprecated_system_packages_yaml_integration_{TENSORFLOW_DOMAIN}",
+        f"deprecated_system_packages_yaml_integration_{DOMAIN}",
     ) in issue_registry.issues