tests: actually log into the generated disk image

This commit adds an integration test that ensures that the generated
disk can be logged into via ssh by the blueprint user.

.github/workflows/tests.yml

@@ -69,7 +69,7 @@ jobs:
       uses: actions/setup-python@v4
     - name: Install test dependencies
       run: |
-        sudo apt install -y podman python3-pytest flake8 qemu-system-x86
+        sudo apt install -y podman python3-pytest python3-paramiko flake8 qemu-system-x86
     - name: Run tests
       run: |
         # podman needs (parts of) the environment but will break when

plans/all.fmf

@@ -11,6 +11,7 @@ prepare:
     - podman
     - pytest
     - python3-flake8
+    - python3-paramiko
     - qemu-kvm
 execute:
   how: tmt

test/test_smoke.py

@@ -92,6 +92,8 @@ def test_smoke(output_path, config_json):
         print("WARNING: selinux not enabled, cannot check for denials")
 
     with VM(generated_img) as test_vm:
-        # TODO: replace with 'test_vm.run("true")' once user creation via
-        #       blueprints works
-        test_vm.wait_ssh_ready()
+        exit_status, _ = test_vm.run("true", user="test", password="password")
+        assert exit_status == 0
+        exit_status, output = test_vm.run("echo hello", user="test", password="password")
+        assert exit_status == 0
+        assert "hello" in output

test/vm.py

@@ -1,10 +1,14 @@
 import pathlib
 import subprocess
 import sys
+from io import StringIO
 
 from testutil import get_free_port, wait_ssh_ready
 
 
+from paramiko.client import AutoAddPolicy, SSHClient
+
+
 class VM:
     MEM = "2000"
     QEMU = "qemu-system-x86_64"
@@ -64,3 +68,25 @@ def __enter__(self):
 
     def __exit__(self, type, value, tb):
         self.force_stop()
+
+    def run(self, cmd, user, password):
+        if not self._qemu_p:
+            self.start()
+        client = SSHClient()
+        client.set_missing_host_key_policy(AutoAddPolicy)
+        client.connect(
+            "localhost", self._ssh_port, user, password,
+            allow_agent=False, look_for_keys=False)
+        chan = client.get_transport().open_session()
+        chan.get_pty()
+        chan.exec_command(cmd)
+        stdout_f = chan.makefile()
+        output = StringIO()
+        while True:
+            out = stdout_f.readline()
+            if not out:
+                break
+            self._log(out)
+            output.write(out)
+        exit_status = stdout_f.channel.recv_exit_status()
+        return exit_status, output.getvalue()