DX-2285 Add answerCall Attribute to Ring BXML (#41)

* Update Ring Verb

Add answerCall attribute to <Ring> and update test

* add param comment

Author: ajrice6713

bandwidth/tests/test_bxml.py

@@ -334,12 +334,13 @@ def test_bridge(self):
 
     def test_ring(self):
         ring = Ring(
-            duration=5
+            duration=5,
+            answer_call=False
         )
 
         response = Response()
         response.add_verb(ring)
-        expected_bxml = '<?xml version="1.0" encoding="UTF-8"?><Response><Ring duration="5"/></Response>'
+        expected_bxml = '<?xml version="1.0" encoding="UTF-8"?><Response><Ring duration="5" answerCall="False"/></Response>'
         assert (response.to_bxml() == expected_bxml)
 
     def test_start_gather(self):

bandwidth/voice/bxml/verbs/ring.py

@@ -15,16 +15,20 @@
 
 class Ring(AbstractBxmlVerb):
 
-    def __init__(self, duration):
+    def __init__(self, duration=None, answer_call=None):
         """
         Initializes the Ring class with the duration parameter
 
         :param float duration: The time in seconds to ring
+        :param boolean answer_call: Whether or not to accept the incoming call while playing the ring
         """
         self.duration = duration
+        self.answer_call = answer_call
 
     def to_bxml(self):
         root = etree.Element(RING_TAG)
         if self.duration is not None:
             root.set("duration", str(self.duration))
+        if self.answer_call is not None:
+            root.set("answerCall", str(self.answer_call))
         return etree.tostring(root).decode()