test: Fix test cache issue

The documentation did not match the implementation, no coins
were mined to the OP_TRUE address.

test/functional/feature_blockfilterindex_prune.py

@@ -33,7 +33,7 @@ def run_test(self):
 
         self.log.info("prune some blocks")
         pruneheight = self.nodes[0].pruneblockchain(400)
-        assert_equal(pruneheight, 250)
+        assert_equal(pruneheight, 248)
 
         self.log.info("check if we can access the tips blockfilter when we have pruned some blocks")
         assert_greater_than(len(self.nodes[0].getblockfilter(self.nodes[0].getbestblockhash())['filter']), 0)

test/functional/test_framework/test_framework.py

@@ -739,11 +739,12 @@ def _initialize_chain(self):
             # block in the cache does not age too much (have an old tip age).
             # This is needed so that we are out of IBD when the test starts,
             # see the tip age check in IsInitialBlockDownload().
-            gen_addresses = [k.address for k in TestNode.PRIV_KEYS] + [ADDRESS_BCRT1_P2WSH_OP_TRUE]
+            gen_addresses = [k.address for k in TestNode.PRIV_KEYS][:3] + [ADDRESS_BCRT1_P2WSH_OP_TRUE]
+            assert_equal(len(gen_addresses), 4)
             for i in range(8):
                 cache_node.generatetoaddress(
                     nblocks=25 if i != 7 else 24,
-                    address=gen_addresses[i % 4],
+                    address=gen_addresses[i % len(gen_addresses)],
                 )
 
             assert_equal(cache_node.getblockchaininfo()["blocks"], 199)