Move MQTT platforms under the component (#20050)

* Move MQTT platforms under the component

tests/components/mqtt/test_camera.py

@@ -0,0 +1,54 @@
+"""The tests for mqtt camera component."""
+import asyncio
+
+from homeassistant.setup import async_setup_component
+
+from tests.common import (
+    async_mock_mqtt_component, async_fire_mqtt_message)
+
+
+@asyncio.coroutine
+def test_run_camera_setup(hass, aiohttp_client):
+    """Test that it fetches the given payload."""
+    topic = 'test/camera'
+    yield from async_mock_mqtt_component(hass)
+    yield from async_setup_component(hass, 'camera', {
+        'camera': {
+            'platform': 'mqtt',
+            'topic': topic,
+            'name': 'Test Camera',
+        }})
+
+    url = hass.states.get('camera.test_camera').attributes['entity_picture']
+
+    async_fire_mqtt_message(hass, topic, 'beer')
+    yield from hass.async_block_till_done()
+
+    client = yield from aiohttp_client(hass.http.app)
+    resp = yield from client.get(url)
+    assert resp.status == 200
+    body = yield from resp.text()
+    assert body == 'beer'
+
+
+@asyncio.coroutine
+def test_unique_id(hass):
+    """Test unique id option only creates one camera per unique_id."""
+    yield from async_mock_mqtt_component(hass)
+    yield from async_setup_component(hass, 'camera', {
+        'camera': [{
+            'platform': 'mqtt',
+            'name': 'Test Camera 1',
+            'topic': 'test-topic',
+            'unique_id': 'TOTALLY_UNIQUE'
+        }, {
+            'platform': 'mqtt',
+            'name': 'Test Camera 2',
+            'topic': 'test-topic',
+            'unique_id': 'TOTALLY_UNIQUE'
+        }]
+    })
+
+    async_fire_mqtt_message(hass, 'test-topic', 'payload')
+    yield from hass.async_block_till_done()
+    assert len(hass.states.async_all()) == 1