test: add excluded-in-CI live tests

bdk-python/tests/test_live_tx_builder.py

@@ -0,0 +1,38 @@
+import bdkpython as bdk
+import unittest
+
+class TestLiveTxBuilder(unittest.TestCase):
+
+    def test_tx_builder(self):
+        descriptor: bdk.Descriptor = bdk.Descriptor(
+            "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/0/*)",
+            bdk.Network.TESTNET
+        )
+        wallet: bdk.Wallet = bdk.Wallet.new_no_persist(
+            descriptor,
+            None,
+            bdk.Network.TESTNET
+        )
+        esploraClient: bdk.EsploraClient = bdk.EsploraClient(url = "https://mempool.space/testnet/api")
+        update = esploraClient.scan(
+            wallet = wallet,
+            stop_gap = 10,
+            parallel_requests = 1
+        )
+        wallet.apply_update(update)
+
+        self.assertGreater(wallet.get_balance().total(), 0)
+
+        recipient = bdk.Address(
+            address = "tb1qrnfslnrve9uncz9pzpvf83k3ukz22ljgees989",
+            network = bdk.Network.TESTNET
+        )
+
+        psbt = bdk.TxBuilder().add_recipient(script=recipient.script_pubkey(), amount=4200).fee_rate(2.0).finish(wallet)
+        # print(psbt.serialize())
+        
+        self.assertTrue(psbt.serialize().startswith("cHNi"), "The PSBT should start with cHNi")
+
+    
+if __name__ == '__main__':
+    unittest.main()