adds settings_clear method and integration test

lbry/lbry/extras/daemon/Daemon.py

@@ -21,7 +21,7 @@ from torba.client.wallet import Wallet, ENCRYPT_ON_DISK
 from torba.client.baseaccount import SingleKey, HierarchicalDeterministic
 
 from lbry import utils
-from lbry.conf import Config, Setting
+from lbry.conf import Config, Setting, NOT_SET
 from lbry.blob.blob_file import is_valid_blobhash, BlobBuffer
 from lbry.blob_exchange.downloader import download_blob
 from lbry.dht.peer import make_kademlia_peer
@@ -1007,6 +1007,23 @@ class Daemon(metaclass=JSONRPCServerType):
             setattr(c, key, cleaned)
         return {key: cleaned}
 
+    def jsonrpc_settings_clear(self, key):
+        """
+        Clear daemon settings
+
+        Usage:
+            settings_clear (<key>)
+
+        Options:
+            None
+
+        Returns:
+            (dict) Updated dictionary of daemon settings
+        """
+        with self.conf.update_config() as c:
+            setattr(c, key, NOT_SET)
+        return
+
     PREFERENCE_DOC = """
     Preferences management.
     """

lbry/tests/integration/test_other_commands.py

@@ -10,3 +10,20 @@ class AddressManagement(CommandTestCase):
         single = await self.out(self.daemon.jsonrpc_address_list(addresses['items'][11]['address']))
         self.assertItemCount(single, 1)
         self.assertEqual(single['items'][0], addresses['items'][11])
+
+    async def test_settings(self):
+        settings = self.daemon.jsonrpc_settings_get()
+        self.assertNotEqual(settings['lbryum_servers'][0],('127.0.0.1', 50002))
+        self.assertEqual(settings['lbryum_servers'][0],('127.0.0.1', 50001))
+
+        servers = ['server:50001', 'server2:50001']
+        self.daemon.jsonrpc_settings_set('lbryum_servers', servers)
+        self.daemon.jsonrpc_settings_set('use_upnp', True)
+        settings2 = self.daemon.jsonrpc_settings_get()
+        self.assertEqual(settings2['lbryum_servers'][0], ('server', 50001))
+        self.assertEqual(settings2['use_upnp'], True)
+
+        self.daemon.jsonrpc_settings_clear('lbryum_servers')
+        settings3 = self.daemon.jsonrpc_settings_get()
+        self.assertNotEqual(settings3['lbryum_servers'][0], ('spv1.lbry.com', 50002))
+        self.assertEqual(settings3['lbryum_servers'][0], ('spv1.lbry.com', 50001))