Add randomly generated decode tests (#712)

* Add randomly generated decode tests

* change python tests to use assertAlmostEqual instead of hand rolled version

* python formatting

* remove rounding of coordinates in JS decode

* undo rounding removal

Author: drinckes

python/openlocationcode_test.py

@@ -142,14 +142,14 @@ def test_decoding(self):
         precision = 10
         for td in self.testdata:
             decoded = olc.decode(td['code'])
-            self.assertEqual(round(decoded.latitudeLo, precision),
-                             round(td['latLo'], precision), td)
-            self.assertEqual(round(decoded.longitudeLo, precision),
-                             round(td['lngLo'], precision), td)
-            self.assertEqual(round(decoded.latitudeHi, precision),
-                             round(td['latHi'], precision), td)
-            self.assertEqual(round(decoded.longitudeHi, precision),
-                             round(td['longHi'], precision), td)
+            self.assertAlmostEqual(decoded.latitudeLo, td['latLo'], precision,
+                                   td)
+            self.assertAlmostEqual(decoded.longitudeLo, td['lngLo'], precision,
+                                   td)
+            self.assertAlmostEqual(decoded.latitudeHi, td['latHi'], precision,
+                                   td)
+            self.assertAlmostEqual(decoded.longitudeHi, td['longHi'], precision,
+                                   td)
 
 
 class Benchmark(unittest.TestCase):