Vendorize vincenty requirement (#2176)

tests/util/test_location.py

@@ -0,0 +1,45 @@
+"""Test Home Assistant location util methods."""
+# pylint: disable=too-many-public-methods
+import unittest
+
+import homeassistant.util.location as location_util
+
+# Paris
+COORDINATES_PARIS = (48.864716, 2.349014)
+# New York
+COORDINATES_NEW_YORK = (40.730610, -73.935242)
+
+# Results for the assertion (vincenty algorithm):
+#      Distance [km]   Distance [miles]
+# [0]  5846.39         3632.78
+# [1]  5851            3635
+#
+# [0]: http://boulter.com/gps/distance/
+# [1]: https://www.wolframalpha.com/input/?i=from+paris+to+new+york
+DISTANCE_KM = 5846.39
+DISTANCE_MILES = 3632.78
+
+
+class TestLocationUtil(unittest.TestCase):
+    """Test util location methods."""
+
+    def test_get_distance(self):
+        """Test getting the distance."""
+        meters = location_util.distance(COORDINATES_PARIS[0],
+                                        COORDINATES_PARIS[1],
+                                        COORDINATES_NEW_YORK[0],
+                                        COORDINATES_NEW_YORK[1])
+        self.assertAlmostEqual(meters / 1000, DISTANCE_KM, places=2)
+
+    def test_get_kilometers(self):
+        """Test getting the distance between given coordinates in km."""
+        kilometers = location_util.vincenty(COORDINATES_PARIS,
+                                            COORDINATES_NEW_YORK)
+        self.assertEqual(round(kilometers, 2), DISTANCE_KM)
+
+    def test_get_miles(self):
+        """Test getting the distance between given coordinates in miles."""
+        miles = location_util.vincenty(COORDINATES_PARIS,
+                                       COORDINATES_NEW_YORK,
+                                       miles=True)
+        self.assertEqual(round(miles, 2), DISTANCE_MILES)