testing: add growpart integration test (#1104)

Add growpart integration test and associated unit tests

Additionally, a small runcmd check for a commented line.

2 files changed, 64 insertions, 0 deletions

diff --git a/tests/integration_tests/modules/test_combined.py b/tests/integration_tests/modules/test_combined.py
index 2635d41a..bc19c2a2 100644
--- a/tests/integration_tests/modules/test_combined.py
+++ b/tests/integration_tests/modules/test_combined.py
@@ -53,6 +53,8 @@ rsyslog:
     me: "127.0.0.1"
 runcmd:
   - echo 'hello world' > /var/tmp/runcmd_output
+
+  - #
   - logger "My test log"
 snap:
   squashfuse_in_container: true
diff --git a/tests/integration_tests/modules/test_growpart.py b/tests/integration_tests/modules/test_growpart.py
new file mode 100644
index 00000000..af1e3a15
--- /dev/null
+++ b/tests/integration_tests/modules/test_growpart.py
@@ -0,0 +1,62 @@
+import os
+import pytest
+import pathlib
+import json
+from uuid import uuid4
+from pycloudlib.lxd.instance import LXDInstance
+
+from cloudinit.subp import subp
+from tests.integration_tests.instances import IntegrationInstance
+
+DISK_PATH = '/tmp/test_disk_setup_{}'.format(uuid4())
+
+
+def setup_and_mount_lxd_disk(instance: LXDInstance):
+    subp('lxc config device add {} test-disk-setup-disk disk source={}'.format(
+        instance.name, DISK_PATH).split())
+
+
+@pytest.fixture(scope='class', autouse=True)
+def create_disk():
+    """Create 16M sparse file"""
+    pathlib.Path(DISK_PATH).touch()
+    os.truncate(DISK_PATH, 1 << 24)
+    yield
+    os.remove(DISK_PATH)
+
+
+# Create undersized partition in bootcmd
+ALIAS_USERDATA = """\
+#cloud-config
+bootcmd:
+  - parted /dev/sdb --script                \
+          mklabel gpt                       \
+          mkpart primary 0 1MiB
+  - parted /dev/sdb --script print
+growpart:
+  devices:
+  - "/"
+  - "/dev/sdb1"
+runcmd:
+  - parted /dev/sdb --script print
+"""
+
+
+@pytest.mark.user_data(ALIAS_USERDATA)
+@pytest.mark.lxd_setup.with_args(setup_and_mount_lxd_disk)
+@pytest.mark.ubuntu
+@pytest.mark.lxd_vm
+class TestGrowPart:
+    """Test growpart"""
+
+    def test_grow_part(self, client: IntegrationInstance):
+        """Verify """
+        log = client.read_from_file('/var/log/cloud-init.log')
+        assert ("cc_growpart.py[INFO]: '/dev/sdb1' resized:"
+                " changed (/dev/sdb, 1) from") in log
+
+        lsblk = json.loads(client.execute('lsblk --json'))
+        sdb = [x for x in lsblk['blockdevices'] if x['name'] == 'sdb'][0]
+        assert len(sdb['children']) == 1
+        assert sdb['children'][0]['name'] == 'sdb1'
+        assert sdb['size'] == '16M'