Add unit test for LibcUtil().mallinfo2().

tests/backend/model_management/test_libc_util.py

@@ -0,0 +1,16 @@
+import pytest
+
+from invokeai.backend.model_management.libc_util import LibcUtil
+
+
+def test_libc_util_mallinfo2():
+    """Smoke test of LibcUtil().mallinfo2()."""
+    try:
+        libc = LibcUtil()
+    except OSError:
+        # TODO: Set the expected result preemptively based on the system properties.
+        pytest.xfail("libc shared library is not available on this system.")
+
+    info = libc.mallinfo2()
+
+    assert info.arena > 0