1 files changed, 27 insertions, 0 deletions
diff --git a/tests/unittests/distros/test_gentoo.py b/tests/unittests/distros/test_gentoo.py
new file mode 100644
index 00000000..dadf5df5
--- /dev/null
+++ b/tests/unittests/distros/test_gentoo.py
@@ -0,0 +1,27 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+from cloudinit import atomic_helper, util
+from tests.unittests.helpers import CiTestCase
+
+from . import _get_distro
+
+
+class TestGentoo(CiTestCase):
+    def test_write_hostname(self):
+        distro = _get_distro("gentoo")
+        hostname = "myhostname"
+        hostfile = self.tmp_path("hostfile")
+        distro._write_hostname(hostname, hostfile)
+        self.assertEqual('hostname="myhostname"\n', util.load_file(hostfile))
+
+    def test_write_existing_hostname_with_comments(self):
+        distro = _get_distro("gentoo")
+        hostname = "myhostname"
+        contents = '#This is the hostname\nhostname="localhost"'
+        hostfile = self.tmp_path("hostfile")
+        atomic_helper.write_file(hostfile, contents, omode="w")
+        distro._write_hostname(hostname, hostfile)
+        self.assertEqual(
+            '#This is the hostname\nhostname="myhostname"\n',
+            util.load_file(hostfile),
+        )