test(hotplug): Simplify test_multi_nic_hotplug (#5763)

No functional test, just noop simplification of the test code.

tests/integration_tests/modules/test_hotplug.py

@@ -4,6 +4,7 @@
 import paramiko
 import pytest
 import yaml
+from pycloudlib.ec2.instance import EC2Instance
 
 from cloudinit.subp import subp
 from tests.integration_tests.clouds import IntegrationCloud
@@ -244,62 +245,66 @@ def test_no_hotplug_in_userdata(client: IntegrationInstance):
 
 
 @pytest.mark.skipif(PLATFORM != "ec2", reason="test is ec2 specific")
-def test_multi_nic_hotplug(setup_image, session_cloud: IntegrationCloud):
+@pytest.mark.user_data(USER_DATA)
+def test_multi_nic_hotplug(client: IntegrationInstance):
     """Tests that additional secondary NICs are routable from non-local
     networks after the hotplug hook is executed when network updates
     are configured on the HOTPLUG event."""
-    with session_cloud.launch(launch_kwargs={}, user_data=USER_DATA) as client:
-        ips_before = _get_ip_addr(client)
-        secondary_priv_ip = client.instance.add_network_interface(
-            ipv4_public_ip_count=1,
-        )
-        _wait_till_hotplug_complete(client, expected_runs=1)
+    ips_before = _get_ip_addr(client)
+    secondary_priv_ip = client.instance.add_network_interface(
+        ipv4_public_ip_count=1,
+    )
+    _wait_till_hotplug_complete(client, expected_runs=1)
 
-        log_content = client.read_from_file("/var/log/cloud-init.log")
-        verify_clean_log(log_content)
-        verify_clean_boot(client)
+    log_content = client.read_from_file("/var/log/cloud-init.log")
+    verify_clean_log(log_content)
+    verify_clean_boot(client)
 
-        ips_after_add = _get_ip_addr(client)
+    ips_after_add = _get_ip_addr(client)
 
-        netplan_cfg = client.read_from_file("/etc/netplan/50-cloud-init.yaml")
-        config = yaml.safe_load(netplan_cfg)
-        new_addition = [
-            ip for ip in ips_after_add if ip.ip4 == secondary_priv_ip
-        ][0]
-        assert new_addition.interface in config["network"]["ethernets"]
-        new_nic_cfg = config["network"]["ethernets"][new_addition.interface]
-        assert [{"from": secondary_priv_ip, "table": 101}] == new_nic_cfg[
-            "routing-policy"
-        ]
+    netplan_cfg = client.read_from_file("/etc/netplan/50-cloud-init.yaml")
+    config = yaml.safe_load(netplan_cfg)
+    new_addition = [ip for ip in ips_after_add if ip.ip4 == secondary_priv_ip][
+        0
+    ]
+    assert new_addition.interface in config["network"]["ethernets"]
+    new_nic_cfg = config["network"]["ethernets"][new_addition.interface]
+    assert [{"from": secondary_priv_ip, "table": 101}] == new_nic_cfg[
+        "routing-policy"
+    ]
 
-        assert len(ips_after_add) == len(ips_before) + 1
-        public_ips = client.instance.public_ips
-        assert len(public_ips) == 2
+    assert len(ips_after_add) == len(ips_before) + 1
 
-        # SSH over all public ips works
-        for pub_ip in public_ips:
-            subp("nc -w 10 -zv " + pub_ip + " 22", shell=True)
+    # help mypy realize client.instance is an instance of EC2Instance as
+    # public_ips is only available on ec2 instances
+    assert isinstance(client.instance, EC2Instance)
+    public_ips = client.instance.public_ips
+    assert len(public_ips) == 2
 
-        # Remove new NIC
-        client.instance.remove_network_interface(secondary_priv_ip)
-        _wait_till_hotplug_complete(client, expected_runs=2)
+    # SSH over all public ips works
+    for pub_ip in public_ips:
+        subp("nc -w 10 -zv " + pub_ip + " 22", shell=True)
 
-        public_ips = client.instance.public_ips
-        assert len(public_ips) == 1
-        # SSH over primary NIC works
-        subp("nc -w 10 -zv " + public_ips[0] + " 22", shell=True)
+    # Remove new NIC
+    client.instance.remove_network_interface(secondary_priv_ip)
+    _wait_till_hotplug_complete(client, expected_runs=2)
 
-        ips_after_remove = _get_ip_addr(client)
-        assert len(ips_after_remove) == len(ips_before)
-        assert secondary_priv_ip not in [ip.ip4 for ip in ips_after_remove]
+    public_ips = client.instance.public_ips
+    assert len(public_ips) == 1
+    # SSH over primary NIC works
+    subp("nc -w 10 -zv " + public_ips[0] + " 22", shell=True)
 
-        netplan_cfg = client.read_from_file("/etc/netplan/50-cloud-init.yaml")
-        config = yaml.safe_load(netplan_cfg)
-        assert new_addition.interface not in config["network"]["ethernets"]
+    ips_after_remove = _get_ip_addr(client)
+    assert len(ips_after_remove) == len(ips_before)
+    assert secondary_priv_ip not in [ip.ip4 for ip in ips_after_remove]
 
-        log_content = client.read_from_file("/var/log/cloud-init.log")
-        verify_clean_log(log_content)
-        verify_clean_boot(client)
+    netplan_cfg = client.read_from_file("/etc/netplan/50-cloud-init.yaml")
+    config = yaml.safe_load(netplan_cfg)
+    assert new_addition.interface not in config["network"]["ethernets"]
+
+    log_content = client.read_from_file("/var/log/cloud-init.log")
+    verify_clean_log(log_content)
+    verify_clean_boot(client)
 
 
 @pytest.mark.skipif(PLATFORM != "ec2", reason="test is ec2 specific")