tests: Add a new functional test for gettransaction

Author: darosior

test/functional/wallet_basic.py

@@ -499,6 +499,11 @@ def run_test(self):
         self.nodes[0].setlabel(change, 'foobar')
         assert_equal(self.nodes[0].getaddressinfo(change)['ischange'], False)
 
+        # Test "decoded" field value in gettransaction response
+        self.log.info("Testing gettransaction decoding...")
+        tx = self.nodes[0].gettransaction(txid=txid, decode=True)
+        assert_equal(tx["decoded"], self.nodes[0].decoderawtransaction(tx["hex"]))
+
 
 if __name__ == '__main__':
     WalletTest().main()