Don't block startup more than 60 seconds while waiting for components. (#7739)

tests/common.py

@@ -317,7 +317,7 @@ class MockPlatform(object):
 
     # pylint: disable=invalid-name
     def __init__(self, setup_platform=None, dependencies=None,
-                 platform_schema=None):
+                 platform_schema=None, async_setup_platform=None):
         """Initialize the platform."""
         self.DEPENDENCIES = dependencies or []
         self._setup_platform = setup_platform
@@ -325,6 +325,9 @@ class MockPlatform(object):
         if platform_schema is not None:
             self.PLATFORM_SCHEMA = platform_schema
 
+        if async_setup_platform is not None:
+            self.async_setup_platform = async_setup_platform
+
     def setup_platform(self, hass, config, add_devices, discovery_info=None):
         """Set up the platform."""
         if self._setup_platform is not None: