Adds simulated sensor (#12539)

* Create simulated.py

* Create test_simulated.py

* Update .coveragerc

* Drop numpy and fix attributes

Drop numpy and fix attributes to be machine readble

* Update test_simulated.py

* Update simulated.py

* Update test_simulated.py

* Update simulated.py

* Update test_simulated.py

* Update simulated.py

* Update simulated.py

* Update test_simulated.py

* Update simulated.py

* Fix default random seed error

* Update simulated.py

* Addresses balloob comments

* Update simulated.py

tests/components/sensor/test_simulated.py

@@ -0,0 +1,50 @@
+"""The tests for the simulated sensor."""
+import unittest
+
+from homeassistant.components.sensor.simulated import (
+    CONF_UNIT, CONF_AMP, CONF_MEAN, CONF_PERIOD, CONF_PHASE, CONF_FWHM,
+    CONF_SEED, DEFAULT_NAME, DEFAULT_AMP, DEFAULT_MEAN,
+    DEFAULT_PHASE, DEFAULT_FWHM, DEFAULT_SEED)
+from homeassistant.const import CONF_FRIENDLY_NAME
+from homeassistant.setup import setup_component
+from tests.common import get_test_home_assistant
+
+
+class TestSimulatedSensor(unittest.TestCase):
+    """Test the simulated sensor."""
+
+    def setup_method(self, method):
+        """Set up things to be run when tests are started."""
+        self.hass = get_test_home_assistant()
+
+    def teardown_method(self, method):
+        """Stop everything that was started."""
+        self.hass.stop()
+
+    def test_default_config(self):
+        """Test default config."""
+        config = {
+            'sensor': {
+                'platform': 'simulated'}
+        }
+        self.assertTrue(
+            setup_component(self.hass, 'sensor', config))
+        self.hass.block_till_done()
+        assert len(self.hass.states.entity_ids()) == 1
+        state = self.hass.states.get('sensor.simulated')
+        assert state.attributes.get(
+            CONF_FRIENDLY_NAME) == DEFAULT_NAME
+        assert state.attributes.get(
+            CONF_AMP) == DEFAULT_AMP
+        assert state.attributes.get(
+            CONF_UNIT) is None
+        assert state.attributes.get(
+            CONF_MEAN) == DEFAULT_MEAN
+        assert state.attributes.get(
+            CONF_PERIOD) == 60.0
+        assert state.attributes.get(
+            CONF_PHASE) == DEFAULT_PHASE
+        assert state.attributes.get(
+            CONF_FWHM) == DEFAULT_FWHM
+        assert state.attributes.get(
+            CONF_SEED) == DEFAULT_SEED