TPT-4261: Implement integration tests for Expand Create Linodes Options and Password-less Linodes (#693)

* Create tests test_expected_error_if_fields_authorized_users_authorized_keys_root_pass_are_not_set and def test_create_linode_with_kernel_and_boot_size_then_add_disk_and_rebuild

* Add copilot suggestions

* Add code review suggestions

Author: psnoch-akamai

test/integration/models/linode/test_linode.py

@@ -234,6 +234,28 @@ def linode_with_disk_encryption(test_linode_client, request):
     linode_instance.delete()
 
 
+@pytest.fixture(scope="session")
+def create_linode_with_authorized_key(test_linode_client, ssh_key_gen):
+    client = test_linode_client
+
+    region = get_region(client, {"Linodes", "Cloud Firewall"}, site_type="core")
+    label = get_test_label(length=8)
+
+    linode_instance = client.linode.instance_create(
+        "g6-nanode-1",
+        region,
+        image="linode/debian12",
+        label=label,
+        kernel="linode/latest-64bit",
+        boot_size=9000,
+        authorized_keys=ssh_key_gen[0],
+    )
+
+    yield linode_instance
+
+    linode_instance.delete()
+
+
 # Test helper
 def get_status(linode: Instance, status: str):
     return linode.status == status
@@ -1159,3 +1181,56 @@ def test_update_linode_maintenance_policy(create_linode, test_linode_client):
     linode.invalidate()
     assert result
     assert linode.maintenance_policy_id == non_default_policy.slug
+
+
+def test_expected_error_if_fields_authorized_users_authorized_keys_root_pass_are_not_set(
+    test_linode_client,
+):
+    client = test_linode_client
+    region = get_region(client, {"Linodes", "Cloud Firewall"}, site_type="core")
+    label = get_test_label(length=8)
+
+    with pytest.raises(ValueError) as create_instance_error:
+        client.linode.instance_create(
+            "g6-nanode-1",
+            region,
+            image="linode/debian12",
+            label=label,
+            kernel="linode/latest-64bit",
+            boot_size=9000,
+        )
+    assert (
+        "When creating an Instance from an Image, at least one of root_pass, authorized_users, or authorized_keys must be provided."
+        in str(create_instance_error.value)
+    )
+
+
+def test_create_linode_with_kernel_and_boot_size_then_add_disk_and_rebuild(
+    create_linode_with_authorized_key,
+    ssh_key_gen,
+):
+    linode_create = create_linode_with_authorized_key
+    assert linode_create.image.id == "linode/debian12"
+
+    wait_for_condition(10, 300, get_status, linode_create, "running")
+    disk_create = send_request_when_resource_available(
+        300,
+        linode_create.disk_create,
+        size=2000,
+        image="linode/debian12",
+        label="python-disk-test-" + get_test_label(),
+        root_pass="aComplex@Password123",
+    )
+    wait_for_disk_status(disk_create, 120)
+    assert disk_create.status == "ready"
+
+    retry_sending_request(
+        3,
+        linode_create.rebuild,
+        "linode/debian12",
+        authorized_keys=ssh_key_gen[0],
+    )
+    wait_for_condition(10, 300, get_status, linode_create, "rebuilding")
+    assert linode_create.status == "rebuilding"
+    wait_for_condition(10, 300, get_status, linode_create, "running")
+    assert linode_create.image.id == "linode/debian12"