Add unit tests for NavMsg

Author: cbeighley

python/swiftnav/nav_msg.pyx

@@ -32,7 +32,7 @@ cdef class NavMsg:
     self._thisptr = d
 
   def __reduce__(self):
-    return (rebuild_NavMsg, tuple([tuple(self.to_dict().items())]))
+    return (rebuild_NavMsg, tuple(self.to_dict().items()))
 
   def update(self, bit_val):
     return nav_msg_update(&self._thisptr, bit_val)
@@ -46,7 +46,7 @@ cdef class NavMsg:
 
   def __richcmp__(self, other, op):
     """
-    Weird Cython comparison method. See 
+    Weird Cython comparison method. See
     http://docs.cython.org/src/userguide/special_methods.html.
     """
     if op == 2:
@@ -73,13 +73,13 @@ cdef class NavMsg:
     """
     if self.to_dict().keys() != other.to_dict().keys():
       return False
-    
+
     for k in self.to_dict().keys():
       if self.to_dict()[k] != other.to_dict()[k]:
         return False
 
     return True
-      
+
 
 def rebuild_NavMsg(reduced):
   """

python/tests/test_nav_msg.py

@@ -15,4 +15,46 @@ def test_imports():
   """Verify that distributed packages survive setuptools installation.
 
   """
-  assert True
+  assert True
+
+def build_nav_msg():
+  """ Instantiate NavMsg with known attribute values. """
+  nm = swiftnav.nav_msg.NavMsg()
+  nm.from_dict(
+    {
+      'bit_polarity': -1,
+      'frame_words': [[0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0]],
+      'next_subframe_id': 1,
+      'overrun': False,
+      'subframe_bit_index': 0,
+      'subframe_bits': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      'subframe_start_index': 0
+    }
+  )
+  return nm
+
+def test_instantiate():
+  nm = swiftnav.nav_msg.NavMsg()
+
+def test_richcmp():
+  nm_a = build_nav_msg()
+  nm_b = build_nav_msg()
+
+  # Change nm_b's fields slightly.
+  nm_b_dict = nm_b.to_dict()
+  nm_b_dict['bit_polarity'] = 1
+  nm_b.from_dict(nm_b_dict)
+
+  assert nm_a == nm_a
+  assert not(nm_a != nm_a)
+  assert nm_a != nm_b
+  assert not(nm_a == nm_b)
+
+def test_rebuild():
+  nm = build_nav_msg()
+
+  rebuild, args = nm.__reduce__()
+
+  assert rebuild(args) == nm