chore: make default to tesnet to preseve backward compatiblity

Signed-off-by: Manish Dait <daitmanish88@gmail.com>

Author: manishdait

src/hiero_sdk_python/client/network.py

@@ -98,7 +98,7 @@ def __init__(
             Certificate verification is enabled by default for all networks.
             Use Client.set_transport_security() and Client.set_verify_certificates() to customize.
         """
-        self.network: str = network or "localhost"
+        self.network: str = network or "testnet"
         self._mirror_address: str = mirror_address or self.MIRROR_ADDRESS_DEFAULT.get(self.network, "localhost:5600")
         self._mirror_channel: grpc.Channel | None = None
         self._mirror_stub: mirror_consensus_grpc.ConsensusServiceStub | None = None

tests/unit/client_test.py

@@ -557,7 +557,7 @@ def test_for_network_with_hosted_network_forces_tls(network):
     assert client.network.is_transport_security() is True
 
 
-@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom", None])
+@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom"])
 def test_for_network_with_non_hosted_network_not_forces_tls(network):
     """Test that if non hosted-net the port 50211 does not change."""
     network_map = {"127.0.0.1:50211": AccountId(0, 0, 3)}
@@ -569,7 +569,7 @@ def test_for_network_with_non_hosted_network_not_forces_tls(network):
     assert client.network.is_transport_security() is False
 
 
-@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom", None])
+@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom"])
 def test_for_network_with_non_hosted_network_not_downgrade_tls(network):
     """Test that if non hosted-net the port 50212 does not change."""
     network_map = {"127.0.0.1:50212": AccountId(0, 0, 3)}

tests/unit/network_test.py

@@ -452,11 +452,11 @@ def test_resolve_nodes_fallback_to_default(monkeypatch):
     assert resolved_nodes[0]._account_id == network.DEFAULT_NODES[network_name][0][1]
 
 
-def test_network_default_is_local():
-    """Test that a new Network defaults to localhost and non-tls."""
+def test_network_default_is_testnet():
+    """Test that a new Network defaults to testnet and tls."""
     network = Network()
-    assert network.network == "localhost"
-    assert network._transport_security is False
+    assert network.network == "testnet"
+    assert network._transport_security is True
 
 
 @pytest.mark.parametrize("network", ["mainnet", "previewnet", "testnet"])
@@ -483,7 +483,7 @@ def test_self_hosted_network_respect_port_50212(network):
     assert network._transport_security is True
 
 
-@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom", None])
+@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom"])
 def test_non_hosted_network_respects_port_50211(network):
     """Test that on non-hosted network, port 50211 stays 50211 and remains non-tls."""
     node_50211 = _Node(AccountId(0, 0, 3), "127.0.0.1:50211", None)
@@ -495,7 +495,7 @@ def test_non_hosted_network_respects_port_50211(network):
     assert network._transport_security is False
 
 
-@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom", None])
+@pytest.mark.parametrize("network", ["local", "localhost", "solo", "custom"])
 def test_non_hosted_network_respect_port_50212(network):
     """Test that on non hosted network respect port 50212"""
     node_50211 = _Node(AccountId(0, 0, 3), "127.0.0.1:50212", None)