Closes #117 JSONPRCClient host as a parameter in constructor

pyethapp/rpc_client.py

@@ -56,9 +56,9 @@ class JSONRPCClientReplyError(Exception):
 class JSONRPCClient(object):
     protocol = JSONRPCProtocol()
 
-    def __init__(self, port=4000, print_communication=True, privkey=None, sender=None):
+    def __init__(self, host='127.0.0.1', port=4000, print_communication=True, privkey=None, sender=None):
         "specify privkey for local signing"
-        self.transport = HttpPostClientTransport('http://127.0.0.1:{}'.format(port))
+        self.transport = HttpPostClientTransport('http://{}:{}'.format(host, port))
         self.print_communication = print_communication
         self.privkey = privkey
         self._sender = sender

pyethapp/tests/test_rpc_client.py

@@ -4,3 +4,17 @@ def test_find_block():
     JSONRPCClient.call = lambda self, cmd, num, flag: num
     client = JSONRPCClient()
     client.find_block(lambda x: x == '0x5')
+
+
+def test_default_host():
+    default_host = '127.0.0.1'
+    client = JSONRPCClient()
+    assert client.transport.endpoint == 'http://{}:{}'.format(default_host, client.port)
+
+
+def test_set_host():
+    host = '1.1.1.1'
+    default_host = '127.0.0.1'
+    client = JSONRPCClient(host)
+    assert client.transport.endpoint == 'http://{}:{}'.format(host, client.port)
+    assert client.transport.endpoint != 'http://{}:{}'.format(default_host, client.port)