tests: Add simple test for python-pycdio

This is a simple tmt test demonstrating that the installed library can
be used.

Resolves: RHEL-75941

.fmf/version

@@ -0,0 +1 @@
+1

gating.yaml

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+--- !Policy
+product_versions:
+  - rhel-10
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

plans/run-test.fmf

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+summary: Run python-pycdio tests
+prepare:
+    how: install
+    package:
+    - python3-pycdio
+    - xorriso
+
+execute:
+    script: |
+        mkisofs -V "PYCDIO TEST" -o ./test.iso ./tests/
+        ./tests/scripts/print-iso-volid ./test.iso | grep "PYCDIO TEST"

tests/scripts/print-iso-volid

@@ -0,0 +1,19 @@
+#!/usr/bin/python3
+
+import sys
+import iso9660
+
+if len(sys.argv) < 2:
+    print(f"USAGE: {sys.argv[0]} ISOFILE", file=sys.stderr)
+    sys.exit(1)
+
+iso = iso9660.ISO9660.IFS(source=sys.argv[1])
+if not iso.is_open():
+    raise RuntimeError(f"error opening file: {sys.argv[1]}")
+
+label = iso.get_volume_id()
+if label is None:
+    raise RuntimeError("error reading volume id")
+
+print(f"LABEL = {label}")
+sys.exit(0)