Fixed component_tests config (#1608)

script/component_test

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -e
+
+cd "$(dirname "$0")/.."
+
+set -x
+
+pytest tests/component_tests

script/fulltest

@@ -10,4 +10,5 @@ script/ci-custom.py
 script/lint-python
 script/lint-cpp
 script/unit_test
+script/component_test
 script/test

tests/component_tests/conftest.py

@@ -1,5 +1,13 @@
 """Fixtures for component tests."""
 
+import sys
+from pathlib import Path
+
+# Add package root to python path
+here = Path(__file__).parent
+package_root = here.parent.parent
+sys.path.insert(0, package_root.as_posix())
+
 import pytest
 
 from esphome.core import CORE