[tests] don't override __init__() in individual tests

Almost all test scripts currently need to override the __init__()
method. When they do that they need to call into super().__init__() as
the base class does some generic initialization.

This commit makes the base class __init__() call into set_test_params()
method. Individual test cases can override set_test_params() to setup
their test parameters.

1 files changed, 2 insertions, 5 deletions

diff --git a/test/functional/p2p-segwit.py b/test/functional/p2p-segwit.py
index 9189f5ef23..8c2d2f0272 100755
--- a/test/functional/p2p-segwit.py
+++ b/test/functional/p2p-segwit.py
@@ -33,8 +33,7 @@ def get_virtual_size(witness_block):
     return vsize
 
 class TestNode(NodeConnCB):
-    def __init__(self):
-        super().__init__()
+    def set_test_params(self):
         self.getdataset = set()
 
     def on_getdata(self, conn, message):
@@ -109,9 +108,7 @@ def sign_P2PK_witness_input(script, txTo, inIdx, hashtype, value, key):
 
 
 class SegWitTest(BitcoinTestFramework):
-
-    def __init__(self):
-        super().__init__()
+    def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 3
         self.extra_args = [["-whitelist=127.0.0.1"], ["-whitelist=127.0.0.1", "-acceptnonstdtxn=0"], ["-whitelist=127.0.0.1", "-vbparams=segwit:0:0"]]