Merge #14733: P2P: Make peer timeout configurable, speed up very slow test and ensure correct code path tested.

48b37db50 make peertimeout a debug argument, remove error message translation (Zain Iqbal Allarakhia)
8042bbfbf p2p: allow p2ptimeout to be configurable, speed up slow test (Zain Iqbal Allarakhia)

Pull request description:

  **Summary:**

  1. _Primary_: Adds a `debug_only=true` flag for peertimeout, defaults to 60 sec., the current hard-coded setting.
  2. _Secondary_: Drastically speeds up `p2p_timeout.py` test.
  3. _Secondary_: Tests that the correct code path is being tested by adding log assertions to the test.

  **Rationale:**

  - P2P timeout was hard-coded: make it explicitly specified and configurable, instead of a magic number.
  - Addresses #13518; `p2p_timeout.py` takes 4 sec. to run instead of 61 sec.
  - Makes `p2p_timeout.py` more explicit. Previously, we relied on a comment to inform us of the timeout amount being tested. Now it is specified directly in the test via passing in the new arg; `-peertimeout=3`.
  - Opens us up to testing more P2P scenarios; oftentimes slow tests are the reason we don't test.

  **Locally verified changes:**

  _With Proposed Change (4.7 sec.):_
  ```
  $ time ./test/functional/p2p_timeouts.py
  2018-11-19T00:04:19.077000Z TestFramework (INFO): Initializing test directory /tmp/testhja7g2n7
  2018-11-19T00:04:23.479000Z TestFramework (INFO): Stopping nodes
  2018-11-19T00:04:23.683000Z TestFramework (INFO): Cleaning up /tmp/testhja7g2n7 on exit
  2018-11-19T00:04:23.683000Z TestFramework (INFO): Tests successful

  real    0m4.743s
  ```

  _Currently  on master (62.8 sec.):_
  ```
  $ time ./test/functional/p2p_timeouts.py
  2018-11-19T00:06:10.948000Z TestFramework (INFO): Initializing test directory /tmp/test6mo6k21h
  2018-11-19T00:07:13.376000Z TestFramework (INFO): Stopping nodes
  2018-11-19T00:07:13.631000Z TestFramework (INFO): Cleaning up /tmp/test6mo6k21h on exit
  2018-11-19T00:07:13.631000Z TestFramework (INFO): Tests successful

  real    1m2.836s
  ```

  _Error message demonstrated for new argument `-peertimeout`:_
  ```
  $ ./bitcoind -peertimeout=-5
  ...
  Error: peertimeout cannot be configured with a negative value.
  ```

Tree-SHA512: ff7a244ebea54c4059407bf4fb86465714e6a79cef5d2bcaa22cfe831a81761aaf597ba4d5172fc2ec12266f54712216fc41b5d24849e5d9dab39ba6f09e3a2a

1 files changed, 17 insertions, 9 deletions

diff --git a/test/functional/p2p_timeouts.py b/test/functional/p2p_timeouts.py
index 2459a9f243..ffed853033 100755
--- a/test/functional/p2p_timeouts.py
+++ b/test/functional/p2p_timeouts.py
@@ -14,11 +14,11 @@
 - Wait 1 second
 - Assert that we're connected
 - Send a ping to no_verack_node and no_version_node
-- Wait 30 seconds
+- Wait 1 second
 - Assert that we're still connected
 - Send a ping to no_verack_node and no_version_node
-- Wait 31 seconds
-- Assert that we're no longer connected (timeout to receive version/verack is 60 seconds)
+- Wait 2 seconds
+- Assert that we're no longer connected (timeout to receive version/verack is 3 seconds)
 """
 
 from time import sleep
@@ -36,6 +36,8 @@ class TimeoutsTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 1
+        # set timeout to receive version/verack to 3 seconds
+        self.extra_args = [["-peertimeout=3"]]
 
     def run_test(self):
         # Setup the p2p connections
@@ -52,7 +54,7 @@ class TimeoutsTest(BitcoinTestFramework):
         no_verack_node.send_message(msg_ping())
         no_version_node.send_message(msg_ping())
 
-        sleep(30)
+        sleep(1)
 
         assert "version" in no_verack_node.last_message
 
@@ -63,11 +65,17 @@ class TimeoutsTest(BitcoinTestFramework):
         no_verack_node.send_message(msg_ping())
         no_version_node.send_message(msg_ping())
 
-        sleep(31)
-
-        assert not no_verack_node.is_connected
-        assert not no_version_node.is_connected
-        assert not no_send_node.is_connected
+        expected_timeout_logs = [
+            "version handshake timeout from 0",
+            "socket no message in first 3 seconds, 1 0 from 1",
+            "socket no message in first 3 seconds, 0 0 from 2",
+        ]
+
+        with self.nodes[0].assert_debug_log(expected_msgs=expected_timeout_logs):
+            sleep(2)
+            assert not no_verack_node.is_connected
+            assert not no_version_node.is_connected
+            assert not no_send_node.is_connected
 
 if __name__ == '__main__':
     TimeoutsTest().main()