QA: Test GBT size/weight limit values

qa/rpc-tests/segwit.py

@@ -130,10 +130,14 @@ class SegWitTest(BitcoinTestFramework):
         print("Verify sigops are counted in GBT with pre-BIP141 rules before the fork")
         txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)
         tmpl = self.nodes[0].getblocktemplate({})
+        assert(tmpl['sizelimit'] == 1000000)
+        assert('weightlimit' not in tmpl)
         assert(tmpl['sigoplimit'] == 20000)
         assert(tmpl['transactions'][0]['hash'] == txid)
         assert(tmpl['transactions'][0]['sigops'] == 2)
         tmpl = self.nodes[0].getblocktemplate({'rules':['segwit']})
+        assert(tmpl['sizelimit'] == 1000000)
+        assert('weightlimit' not in tmpl)
         assert(tmpl['sigoplimit'] == 20000)
         assert(tmpl['transactions'][0]['hash'] == txid)
         assert(tmpl['transactions'][0]['sigops'] == 2)
@@ -241,6 +245,8 @@ class SegWitTest(BitcoinTestFramework):
         print("Verify sigops are counted in GBT with BIP141 rules after the fork")
         txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)
         tmpl = self.nodes[0].getblocktemplate({'rules':['segwit']})
+        assert(tmpl['sizelimit'] >= 3999577)  # actual maximum size is lower due to minimum mandatory non-witness data
+        assert(tmpl['weightlimit'] == 4000000)
         assert(tmpl['sigoplimit'] == 80000)
         assert(tmpl['transactions'][0]['txid'] == txid)
         assert(tmpl['transactions'][0]['sigops'] == 8)
@@ -250,6 +256,8 @@ class SegWitTest(BitcoinTestFramework):
         try:
             tmpl = self.nodes[0].getblocktemplate({})
             assert(len(tmpl['transactions']) == 1)  # Doesn't include witness tx
+            assert(tmpl['sizelimit'] == 1000000)
+            assert('weightlimit' not in tmpl)
             assert(tmpl['sigoplimit'] == 20000)
             assert(tmpl['transactions'][0]['hash'] == txid)
             assert(tmpl['transactions'][0]['sigops'] == 2)