test: Adjust some Zcash RPC tests to work with parallel runner

qa/rpc-tests/key_import_export.py

@@ -9,8 +9,9 @@ from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_greater_than, start_nodes, connect_nodes_bi
 
 import logging
+import sys
 
-logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
+logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO, stream=sys.stdout)
 
 
 class KeyImportExportTest (BitcoinTestFramework):

qa/rpc-tests/reorg_limit.py

@@ -11,8 +11,11 @@ from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     check_node,
     connect_nodes_bi,
+    start_node,
     sync_blocks,
 )
+
+import tempfile
 from time import sleep
 
 def check_stopped(i, timeout=10):
@@ -28,6 +31,17 @@ def check_stopped(i, timeout=10):
 
 class ReorgLimitTest(BitcoinTestFramework):
 
+    def setup_nodes(self):
+        self.log_stderr = tempfile.SpooledTemporaryFile(max_size=2**16)
+
+        nodes = []
+        nodes.append(start_node(0, self.options.tmpdir, stderr=self.log_stderr))
+        nodes.append(start_node(1, self.options.tmpdir))
+        nodes.append(start_node(2, self.options.tmpdir))
+        nodes.append(start_node(3, self.options.tmpdir))
+
+        return nodes
+
     def run_test(self):
         assert(self.nodes[0].getblockcount() == 200)
         assert(self.nodes[2].getblockcount() == 200)
@@ -66,19 +80,28 @@ class ReorgLimitTest(BitcoinTestFramework):
         assert(self.nodes[0].getblockcount() == 400)
         assert(self.nodes[2].getblockcount() == 401)
 
-        print("Sync nodes to force a reorg")
-        connect_nodes_bi(self.nodes, 0, 2)
-        self.is_network_split = False
-        # sync_blocks uses RPC calls to wait for nodes to be synced, so don't
-        # call it here, because it will have a non-specific connection error
-        # when Node 0 stops. Instead, we explicitly check for the process itself
-        # to stop.
+        try:
+            print("Sync nodes to force a reorg")
+            connect_nodes_bi(self.nodes, 0, 2)
+            self.is_network_split = False
+            # sync_blocks uses RPC calls to wait for nodes to be synced, so don't
+            # call it here, because it will have a non-specific connection error
+            # when Node 0 stops. Instead, we explicitly check for the process itself
+            # to stop.
 
-        print("Check Node 0 is no longer running")
-        assert(check_stopped(0))
+            print("Check Node 0 is no longer running")
+            assert(check_stopped(0))
 
-        # Dummy stop to enable the test to tear down
-        self.nodes[0].stop = lambda: True
+            # Check that node 0 stopped for the expected reason.
+            self.log_stderr.seek(0)
+            stderr = self.log_stderr.read().decode('utf-8')
+            expected_msg = "A block chain reorganization has been detected that would roll back 100 blocks!"
+            if expected_msg not in stderr:
+                raise AssertionError("Expected error \"" + expected_msg + "\" not found in:\n" + stderr)
+        finally:
+            self.log_stderr.close()
+            # Dummy stop to enable the test to tear down
+            self.nodes[0].stop = lambda: True
 
 if __name__ == '__main__':
     ReorgLimitTest().main()

qa/rpc-tests/sapling_rewind_check.py

@@ -28,12 +28,15 @@ length computation (40b5d5e3ea4b602c34c4efaba0b9f6171dddfef5) corrects the issue
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (assert_equal, assert_true,
+    assert_start_raises_init_error,
     start_nodes, start_node, connect_nodes_bi,
     bitcoind_processes,
     nuparams, OVERWINTER_BRANCH_ID, SAPLING_BRANCH_ID)
 
-import re
 import logging
+import sys
+
+logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO, stream=sys.stdout)
 
 HAS_SAPLING = [nuparams(OVERWINTER_BRANCH_ID, 10), nuparams(SAPLING_BRANCH_ID, 15)]
 NO_SAPLING = [nuparams(OVERWINTER_BRANCH_ID, 10), nuparams(SAPLING_BRANCH_ID, 150)]
@@ -92,35 +95,15 @@ class SaplingRewindTest(BitcoinTestFramework):
         
         # Restart the nodes, reconnect, and sync the network. This succeeds if "-reindex" is passed.
         logging.info("Reconnecting the network...")
-        try:
-            # expect an exception; the node will refuse to fully start because its last point of
-            # agreement with the rest of the network was prior to the network upgrade activation
-            self.nodes[2] = start_node(2, self.options.tmpdir, extra_args=HAS_SAPLING) # + ["-reindex"])
-        except:
-            logpath = self.options.tmpdir + "/node2/regtest/debug.log"
-            found = False
-            with open(logpath, 'r', encoding='utf8') as f:
-                for line in f:
-                    # Search for the rollback message in the debug log, and ensure that it has the
-                    # correct expected rollback length.
-                    m = re.search(r'roll back ([0-9]+)', line)
-                    if m is None:
-                        continue
-                    elif m.group(1) == "120":
-                        found = True
-                        break
-                    else:
-                        raise AssertionError("Incorrect rollback length %s found, expected 120." %(m.group(1)))
 
-            if not found:
-                raise AssertionError("Expected rollback message not found in log file.")
+        # expect an exception; the node will refuse to fully start because its last point of
+        # agreement with the rest of the network was prior to the network upgrade activation
+        assert_start_raises_init_error(2, self.options.tmpdir, HAS_SAPLING, "roll back 120")
 
-            # restart the node with -reindex to allow the test to complete gracefully,
-            # otherwise the node shutdown call in test cleanup will throw an error since
-            # it can't connect
-            self.nodes[2] = start_node(2, self.options.tmpdir, extra_args=NO_SAPLING + ["-reindex"])
-        else:
-            raise AssertionError("Expected node to halt due to excessive rewind length.")
+        # restart the node with -reindex to allow the test to complete gracefully,
+        # otherwise the node shutdown call in test cleanup will throw an error since
+        # it can't connect
+        self.nodes[2] = start_node(2, self.options.tmpdir, extra_args=NO_SAPLING + ["-reindex"])
 
 if __name__ == '__main__':
     SaplingRewindTest().main()

qa/rpc-tests/zkey_import_export.py

@@ -9,8 +9,9 @@ from test_framework.util import assert_equal, assert_greater_than, start_nodes,\
     initialize_chain_clean, connect_nodes_bi, wait_and_assert_operationid_status
 from functools import reduce
 import logging
+import sys
 
-logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
+logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO, stream=sys.stdout)
 
 fee = Decimal('0.0001') # constant (but can be changed within reason)