1 files changed, 30 insertions, 0 deletions
diff --git a/tests/unittests/test_handler/test_handler_disk_setup.py b/tests/unittests/test_handler/test_handler_disk_setup.py
new file mode 100644
index 00000000..ddef8d48
--- /dev/null
+++ b/tests/unittests/test_handler/test_handler_disk_setup.py
@@ -0,0 +1,30 @@
+from cloudinit.config import cc_disk_setup
+from ..helpers import ExitStack, mock, TestCase
+
+
+class TestIsDiskUsed(TestCase):
+
+    def setUp(self):
+        super(TestIsDiskUsed, self).setUp()
+        self.patches = ExitStack()
+        mod_name = 'cloudinit.config.cc_disk_setup'
+        self.enumerate_disk = self.patches.enter_context(
+            mock.patch('{0}.enumerate_disk'.format(mod_name)))
+        self.check_fs = self.patches.enter_context(
+            mock.patch('{0}.check_fs'.format(mod_name)))
+
+    def test_multiple_child_nodes_returns_true(self):
+        self.enumerate_disk.return_value = (mock.MagicMock() for _ in range(2))
+        self.check_fs.return_value = (mock.MagicMock(), None, mock.MagicMock())
+        self.assertTrue(cc_disk_setup.is_disk_used(mock.MagicMock()))
+
+    def test_valid_filesystem_returns_true(self):
+        self.enumerate_disk.return_value = (mock.MagicMock() for _ in range(1))
+        self.check_fs.return_value = (
+            mock.MagicMock(), 'ext4', mock.MagicMock())
+        self.assertTrue(cc_disk_setup.is_disk_used(mock.MagicMock()))
+
+    def test_one_child_nodes_and_no_fs_returns_false(self):
+        self.enumerate_disk.return_value = (mock.MagicMock() for _ in range(1))
+        self.check_fs.return_value = (mock.MagicMock(), None, mock.MagicMock())
+        self.assertFalse(cc_disk_setup.is_disk_used(mock.MagicMock()))