[mipi_spi] Run spi final validation (#15418)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>

tests/component_tests/mipi_spi/conftest.py

@@ -1,6 +1,7 @@
 """Tests for mpip_spi configuration validation."""
 
 from collections.abc import Callable, Generator
+from unittest import mock
 
 import pytest
 
@@ -12,6 +13,16 @@ from esphome.core import CORE
 from esphome.pins import gpio_pin_schema
 
 
+@pytest.fixture(autouse=True)
+def mock_spi_final_validate():
+    """Mock spi.final_validate_device_schema since unit tests have no real SPI bus config."""
+    with mock.patch(
+        "esphome.components.spi.final_validate_device_schema",
+        return_value=lambda config: None,
+    ):
+        yield
+
+
 @pytest.fixture
 def choose_variant_with_pins() -> Generator[Callable[[list], None]]:
     """

tests/component_tests/mipi_spi/test_display_metadata.py

@@ -25,7 +25,9 @@ from tests.component_tests.types import SetCoreConfigCallable
 
 def validated_config(config):
     """Run schema + final validation and return the validated config."""
-    return FINAL_VALIDATE_SCHEMA(CONFIG_SCHEMA(config))
+    config = CONFIG_SCHEMA(config)
+    FINAL_VALIDATE_SCHEMA(config)
+    return config
 
 
 def test_metadata_native_quad_default_test_card(