Add a test

tests/certbot_dns_snap_test.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+import pytest
+import subprocess
+import glob
+import os
+import re
+
+
+def _get_snap_directory():
+    snap_directory = os.environ.get('SNAP_FOLDER')
+    if not snap_directory:
+        raise ValueError('Error, SNAP_FOLDER environment variable is not set.')
+
+    return snap_directory
+
+
+def _list_dns_snaps_paths():
+    snap_directory = _get_snap_directory()
+    if not snap_directory:
+        raise ValueError('Error, SNAP_FOLDER environment variable is not set.')
+
+    return glob.glob(os.path.join(snap_directory, 'certbot-dns-*_*.snap'))
+
+
+def _extract_plugin_name(dns_snap_path):
+    return re.match(r'^.*certbot-(dns-\w+)_.*\.snap$', dns_snap_path).group(1)
+
+
+@pytest.fixture(autouse=True, scope="module")
+def install_certbot_snap():
+    with pytest.raises(Exception):
+        subprocess.check_call(['certbot', '--version'])
+    try:
+        snap_directory = _get_snap_directory()
+        snap_path = glob.glob(os.path.join(snap_directory, 'certbot_*.snap'))[0]
+        subprocess.check_call(['snap', 'install', '--classic', '--dangerous', snap_path])
+        subprocess.check_call(['certbot', '--version'])
+        yield
+    finally:
+        subprocess.call(['snap', 'remove', 'certbot'])
+
+
+@pytest.mark.parametrize('dns_snap_path', _list_dns_snaps_paths())
+def test_it(dns_snap_path):
+    """
+    Test that each DNS plugin Certbot snap available in SNAP_FOLDER
+    can be installed and is usable with the Certbot snap.
+    """
+    plugin_name = _extract_plugin_name(dns_snap_path)
+    snap_name = 'certbot-{0}'.format(plugin_name)
+    assert plugin_name not in subprocess.check_output(['certbot', 'plugins', '--prepare'],
+                                                      universal_newlines=True)
+
+    try:
+        subprocess.check_call(['snap', 'install', '--dangerous', dns_snap_path])
+        subprocess.check_call(['snap', 'set', 'certbot', 'trust-plugin-with-root=ok'])
+        subprocess.check_call(['snap', 'connect', 'certbot:plugin', snap_name])
+
+        assert plugin_name in subprocess.check_output(['certbot', 'plugins', '--prepare'],
+                                                      universal_newlines=True)
+    finally:
+        subprocess.call(['snap', 'remove', 'plugin_name'])