test: add simple zipl_inst tests

Co-authored-by: Nikita Dubrovskii <nikita@linux.ibm.com>

stages/test/test_zipl_inst.py

@@ -0,0 +1,82 @@
+#!/usr/bin/python3
+
+import os
+import textwrap
+from unittest.mock import patch
+
+from osbuild.testutil import make_fake_tree
+
+STAGE_NAME = "org.osbuild.zipl.inst"
+
+
+@patch("subprocess.run")
+def test_zipl_inst_default(mocked_run, tmp_path, stage_module):
+    make_fake_tree(tmp_path, {
+        "/boot/loader/entries/ostree-1-fedora-coreos.conf": textwrap.dedent("""\
+        title Fedora CoreOS 39.20240206.dev.0 (ostree:0)
+        version 1
+        options ignition.platform.id=qemu ostree=/ostree/boot.1/fedora-coreos/abcd/0
+        linux /vmlinuz-6.6.14-200.fc39.s390x
+        initrd /initramfs-6.6.14-200.fc39.s390x.img
+        """),
+        "/vmlinuz-6.6.14-200.fc39.s390x": "fake-vmlinuz",
+        "/initramfs-6.6.14-200.fc39.s390x.img": "fake-initramfs.img",
+    })
+    fake_paths = {
+        "mounts": os.fspath(tmp_path),
+        "devices": "/run/osbuild/dev",
+    }
+    fake_devices = {
+        "disk": {
+            "path": "some-device-path",
+        }
+    }
+    fake_options = {
+        "kernel": "1",
+        "location": "some-location",
+    }
+
+    stage_module.main(fake_paths, fake_devices, fake_options)
+    assert len(mocked_run.call_args_list) == 1
+    args, kwargs = mocked_run.call_args_list[0]
+    assert len(args) == 1
+    run_argv = args[0]
+    assert "ignition.platform.id=qemu ostree=/ostree/boot.1/fedora-coreos/abcd/0" in run_argv
+    assert kwargs["check"]
+
+
+@patch("subprocess.run")
+def test_zipl_inst_kernel_opts_append(mocked_run, tmp_path, stage_module):
+    make_fake_tree(tmp_path, {
+        "/boot/loader/entries/00_linux.conf": textwrap.dedent("""\
+        title fake-linux
+        linux /vmlinuz
+        initrd /initrd.img
+        options root=/dev/sda1 ro
+        version 6.8
+        """),
+        "/vmlinuz": "fake-vmlinuz",
+        "/initrd.img": "fake-initrd.img",
+    })
+    fake_paths = {
+        "mounts": os.fspath(tmp_path),
+        "devices": "/run/osbuild/dev",
+    }
+    fake_devices = {
+        "disk": {
+            "path": "some-device-path",
+        }
+    }
+    fake_options = {
+        "kernel": "6.8",
+        "location": "some-location",
+        "kernel_opts_append": ["some=more", "opts"],
+    }
+
+    stage_module.main(fake_paths, fake_devices, fake_options)
+    assert len(mocked_run.call_args_list) == 1
+    args, kwargs = mocked_run.call_args_list[0]
+    assert len(args) == 1
+    run_argv = args[0]
+    assert "root=/dev/sda1 ro some=more opts" in run_argv
+    assert kwargs["check"]