test: add fixture with legacy artifacts

This is a temporary measure until we can migrate the tests that don't
pass with the new artifacts.

Signed-off-by: Pablo Barbáchano <pablob@amazon.com>

Author: pb8o

tests/conftest.py

@@ -450,6 +450,16 @@ def uvm_with_initrd(microvm_factory, guest_kernel_linux_4_14, record_property):
     yield uvm
 
 
+@pytest.fixture
+def uvm_legacy(microvm_factory, record_property, artifact_dir):
+    """vm with legacy artifacts (old kernel, Ubuntu 18.04 rootfs)"""
+    kernel = artifact_dir / "legacy/vmlinux.bin"
+    fs = artifact_dir / "legacy/bionic-msrtools.ext4"
+    record_property("kernel", kernel.name)
+    record_property("rootfs", fs.name)
+    yield microvm_factory.build(kernel, fs)
+
+
 # backwards compatibility
 test_microvm_with_api = uvm_plain
 test_microvm_with_initrd = uvm_with_initrd

tests/integration_tests/functional/test_cpu_template_helper.py

@@ -235,15 +235,15 @@ def get_guest_msrs(microvm, msr_index_list):
     ),
 )
 def test_cpu_config_dump_vs_actual(
-    uvm_plain,
+    uvm_legacy,
     cpu_template_helper,
     tmp_path,
 ):
     """
     Verify that the dumped CPU config matches the actual CPU config inside
     guest.
     """
-    microvm = uvm_plain
+    microvm = uvm_legacy
     microvm.spawn()
     microvm.basic_config()
     microvm.add_net_iface()