test: Test year 2106 block timestamps

* Use maximum timestamp in getblocktemplate test
* Mine block with maximum timestamp and MTP in blockchain test

2 files changed, 10 insertions, 1 deletions

diff --git a/test/functional/mining_basic.py b/test/functional/mining_basic.py
index 9c64bb1945..ac7eb96ac1 100755
--- a/test/functional/mining_basic.py
+++ b/test/functional/mining_basic.py
@@ -200,7 +200,7 @@ class MiningTest(BitcoinTestFramework):
 
         self.log.info("getblocktemplate: Test bad timestamps")
         bad_block = copy.deepcopy(block)
-        bad_block.nTime = 2**31 - 1
+        bad_block.nTime = 2**32 - 1
         assert_template(node, bad_block, 'time-too-new')
         assert_submitblock(bad_block, 'time-too-new', 'time-too-new')
         bad_block.nTime = 0
diff --git a/test/functional/rpc_blockchain.py b/test/functional/rpc_blockchain.py
index d07d28879e..80e8fe55a3 100755
--- a/test/functional/rpc_blockchain.py
+++ b/test/functional/rpc_blockchain.py
@@ -89,6 +89,7 @@ class BlockchainTest(BitcoinTestFramework):
         self._test_waitforblockheight()
         self._test_getblock()
         self._test_getdeploymentinfo()
+        self._test_y2106()
         assert self.nodes[0].verifychain(4, 0)
 
     def mine_chain(self):
@@ -255,6 +256,14 @@ class BlockchainTest(BitcoinTestFramework):
         # calling with an explicit hash works
         self.check_signalling_deploymentinfo_result(self.nodes[0].getdeploymentinfo(gbci207["bestblockhash"]), gbci207["blocks"], gbci207["bestblockhash"], "started")
 
+    def _test_y2106(self):
+        self.log.info("Check that block timestamps work until year 2106")
+        self.generate(self.nodes[0], 8)[-1]
+        time_2106 = 2**32 - 1
+        self.nodes[0].setmocktime(time_2106)
+        last = self.generate(self.nodes[0], 6)[-1]
+        assert_equal(self.nodes[0].getblockheader(last)["mediantime"], time_2106)
+
     def _test_getchaintxstats(self):
         self.log.info("Test getchaintxstats")