More tests

Author: lgarber-akamai

linode_api4/objects/linode_interfaces.py

@@ -350,6 +350,21 @@ class LinodeInterface(DerivedBase):
     """
     A Linode's network interface.
 
+    NOTE: When using the ``save()`` method, certain local fields with computed values will
+          not be refreshed on the local object until after ``invalidate()`` has been called::
+
+            # Automatically assign an IPv4 address from the associated VPC Subnet
+            interface.vpc.ipv4.addresses[0].address = "auto"
+
+            # Save the interface
+            interface.save()
+
+            # Invalidate the interface
+            interface.invalidate()
+
+            # Access the new address
+            print(interface.vpc.ipv4.addresses[0].address)
+
     API Documentation: https://techdocs.akamai.com/linode-api/reference/get-linode-interface
     """
 

test/integration/models/linode/interfaces/test_interfaces.py

@@ -5,6 +5,7 @@
 import pytest
 
 from linode_api4 import (
+    ApiError,
     Instance,
     InterfaceGeneration,
     LinodeInterface,
@@ -338,6 +339,44 @@ def test_linode_interface_create_vpc(linode_interface_vpc):
     assert iface.vpc.ipv4.ranges[0].range.split("/")[1] == "29"
 
 
+def test_linode_interface_update_vpc(linode_interface_vpc):
+    iface, instance, vpc, subnet = linode_interface_vpc
+
+    iface.vpc.subnet_id = 0
+
+    try:
+        iface.save()
+    except ApiError:
+        pass
+    else:
+        raise Exception("Expected error when updating subnet_id to 0")
+
+    iface.invalidate()
+
+    old_ipv4 = copy.deepcopy(iface.vpc.ipv4)
+
+    iface.vpc.ipv4.addresses[0].address = "auto"
+    iface.vpc.ipv4.ranges += [
+        LinodeInterfaceVPCIPv4RangeOptions(
+            range="/32",
+        )
+    ]
+
+    iface.save()
+    iface.invalidate()
+
+    address = iface.vpc.ipv4.addresses[0]
+    assert ipaddress.ip_address(address.address)
+
+    range = iface.vpc.ipv4.ranges[0]
+    assert ipaddress.ip_network(range.range)
+    assert range.range == old_ipv4.ranges[0].range
+
+    range = iface.vpc.ipv4.ranges[1]
+    assert ipaddress.ip_network(range.range)
+    assert range.range != old_ipv4.ranges[0].range
+
+
 def test_linode_interface_create_vlan(
     linode_interface_vlan,
 ):