From 13c6c64cded448341de85b9899888e13fded0d29 Mon Sep 17 00:00:00 2001
From: Diogo Gomes <dgomes@av.it.pt>
Date: Sun, 25 Feb 2018 01:20:49 +0000
Subject: [PATCH] added tests

---
 tests/components/sensor/test_filter.py | 86 ++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 tests/components/sensor/test_filter.py

diff --git a/tests/components/sensor/test_filter.py b/tests/components/sensor/test_filter.py
new file mode 100644
index 00000000000..8f7242c1761
--- /dev/null
+++ b/tests/components/sensor/test_filter.py
@@ -0,0 +1,86 @@
+"""The test for the data filter sensor platform."""
+import unittest
+
+from homeassistant.setup import setup_component
+from tests.common import get_test_home_assistant, assert_setup_component
+
+
+class TestFilterSensor(unittest.TestCase):
+    """Test the Data Filter sensor."""
+
+    def setup_method(self, method):
+        """Setup things to be run when tests are started."""
+        self.hass = get_test_home_assistant()
+        self.values = [20, 19, 18, 21, 22, 0]
+
+    def teardown_method(self, method):
+        """Stop everything that was started."""
+        self.hass.stop()
+
+    def test_setup_fail(self):
+        """Test if filter doesn't exist."""
+        config = {
+            'sensor': {
+                'platform': 'filter',
+                'entity_id': 'sensor.test_monitored',
+                'filters': [{'filter': 'nonexisting'}]
+            }
+        }
+        with assert_setup_component(0):
+            assert setup_component(self.hass, 'sensor', config)
+
+        self.hass.start()
+        self.hass.block_till_done()
+
+    def test_outlier(self):
+        """Test if filter outlier works."""
+        config = {
+            'sensor': {
+                'platform': 'filter',
+                'name': 'test',
+                'entity_id': 'sensor.test_monitored',
+                'filters': [{
+                    'filter': 'outlier',
+                    'radius': 4.0
+                    }]
+            }
+        }
+        with assert_setup_component(1):
+            assert setup_component(self.hass, 'sensor', config)
+
+        self.hass.start()
+        self.hass.block_till_done()
+
+        for value in self.values:
+            self.hass.states.set(config['sensor']['entity_id'], value)
+            self.hass.block_till_done()
+
+        state = self.hass.states.get('sensor.test')
+        self.assertEqual('22.0', state.state)
+
+    def test_lowpass(self):
+        """Test if filter lowpass works."""
+        config = {
+            'sensor': {
+                'platform': 'filter',
+                'name': 'test',
+                'entity_id': 'sensor.test_monitored',
+                'filters': [{
+                    'filter': 'lowpass',
+                    'time_constant': 10,
+                    'precision': 2
+                    }]
+            }
+        }
+        with assert_setup_component(1):
+            assert setup_component(self.hass, 'sensor', config)
+
+        self.hass.start()
+        self.hass.block_till_done()
+
+        for value in self.values:
+            self.hass.states.set(config['sensor']['entity_id'], value)
+            self.hass.block_till_done()
+
+        state = self.hass.states.get('sensor.test')
+        self.assertEqual(18.05, round(float(state.state), 2))