rpmbuild: basic sanity check for rhsm

Check that we can actually import the script module, and that we call
the script with correct arguments.

rpmbuild/copr-rpmbuild.spec

@@ -41,6 +41,9 @@ BuildRequires: %{python_pfx}-jinja2
 BuildRequires: %{python_pfx}-specfile >= 0.21.0
 BuildRequires: python3-backoff >= 1.9.0
 BuildRequires: python3-pyyaml
+%if 0%{?fedora} || 0%{?rhel} >= 9
+BuildRequires: subscription-manager
+%endif
 
 BuildRequires: /usr/bin/argparse-manpage
 BuildRequires: python-rpm-macros

rpmbuild/tests/test_rhsm.py

@@ -0,0 +1,43 @@
+import os
+import sys
+import io
+import importlib
+from unittest import mock, skipIf
+
+try:
+    import subscription_manager
+except ImportError:
+    subscription_manager = None
+
+
+def load_module(mod, filename, caller_filename=None):
+    if caller_filename:
+        filename = os.path.realpath(os.path.join(caller_filename, "..",
+                                                 filename))
+
+    # With the help of:
+    # https://stackoverflow.com/questions/2601047/import-a-python-module-without-the-py-extension
+    spec = importlib.util.spec_from_loader(
+        mod,
+        importlib.machinery.SourceFileLoader(mod, filename),
+    )
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    sys.modules[mod] = module
+    return module
+
+
+@skipIf(subscription_manager is None, "subscription-manager not installed")
+def test_rhsm_subscribe_script():
+    with mock.patch("os.getuid", return_value=0):
+        script = load_module("script",
+                             "../bin/copr-builder-rhsm-subscribe",
+                             __file__)
+        sys.argv = ["foo", "--org-id", "1", "--system-name", "system"]
+
+        with mock.patch("sys.stdin", io.StringIO("foo")):
+            with mock.patch("script.rhsm"):
+                script._main()  # pylint: disable=protected-access
+                assert sys.argv == ['subscription-manager', 'register',
+                                    '--force', '--org', '1', '--name', 'system',
+                                    '--activationkey', 'foo']