Extend stratis-decode-dm tests

They now include all --output options.

Signed-off-by: mulhern <amulhern@redhat.com>

Author: mulkieran

testlib/infra.py

@@ -26,6 +26,7 @@
 import time
 import unittest
 from enum import Enum
+from pathlib import Path
 from tempfile import NamedTemporaryFile
 
 # isort: THIRDPARTY
@@ -428,7 +429,7 @@ class FilesystemSymlinkMonitor(unittest.TestCase):
 
     maxDiff = None
 
-    def run_check(self, stop_time):
+    def run_check(self, stop_time):  # pylint: disable=too-many-locals
         """
         Check that the filesystem links on the D-Bus and the filesystem links
         expected from looking at filesystem devicemapper paths match exactly.
@@ -478,6 +479,61 @@ def run_check(self, stop_time):
                                 f"{decode_dm} invocation failed: "
                                 f"{stderrdata.decode('utf-8')}"
                             )
+                    try:
+                        (_, dev, stratis, pool_name, filesystem_name) = Path(
+                            symlink
+                        ).parts
+                    except ValueError as err:
+                        raise RuntimeError(
+                            f"Symlink {symlink} did not decompose into expected parts"
+                        ) from err
+
+                    self.assertEqual(stratis, "stratis")
+                    self.assertEqual(dev, "dev")
+
+                    command = [
+                        decode_dm,
+                        os.path.join(DEV_MAPPER, dev),
+                        "--output=filesystem-name",
+                    ]
+
+                    with subprocess.Popen(
+                        command,
+                        stdout=subprocess.PIPE,
+                        stderr=subprocess.PIPE,
+                    ) as proc:
+                        (stdoutdata, stderrdata) = proc.communicate()
+                        if proc.returncode == 0:
+                            self.assertEqual(
+                                stdoutdata.decode("utf-8").strip(), filesystem_name
+                            )
+                        else:
+                            raise RuntimeError(
+                                f"{decode_dm} invocation failed: "
+                                f"{stderrdata.decode('utf-8')}"
+                            )
+
+                    command = [
+                        decode_dm,
+                        os.path.join(DEV_MAPPER, dev),
+                        "--output=pool-name",
+                    ]
+
+                    with subprocess.Popen(
+                        command,
+                        stdout=subprocess.PIPE,
+                        stderr=subprocess.PIPE,
+                    ) as proc:
+                        (stdoutdata, stderrdata) = proc.communicate()
+                        if proc.returncode == 0:
+                            self.assertEqual(
+                                stdoutdata.decode("utf-8").strip(), pool_name
+                            )
+                        else:
+                            raise RuntimeError(
+                                f"{decode_dm} invocation failed: "
+                                f"{stderrdata.decode('utf-8')}"
+                            )
                 except FileNotFoundError as err:
                     raise RuntimeError(
                         f"Script '{decode_dm}' missing, test could not be run"