rust: build integration test for the qemu_api crate

Adjust the integration test to compile with a subset of QEMU object
files, and make it actually create an object of the class it defines.

Follow the Rust filesystem conventions, where tests go in tests/ if
they use the library in the same way any other code would.

Reviewed-by: Junjie Mao <junjie.mao@hotmail.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/qemu-api/src/lib.rs

@@ -30,9 +30,6 @@ unsafe impl Sync for bindings::VMStateDescription {}
 pub mod definitions;
 pub mod device_class;
 
-#[cfg(test)]
-mod tests;
-
 use std::alloc::{GlobalAlloc, Layout};
 
 #[cfg(HAVE_GLIB_WITH_ALIGNED_ALLOC)]

rust/qemu-api/src/tests.rs

@@ -1,49 +0,0 @@
-// Copyright 2024, Linaro Limited
-// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-use crate::{
-    bindings::*, declare_properties, define_property, device_class_init, vm_state_description,
-};
-
-#[test]
-fn test_device_decl_macros() {
-    // Test that macros can compile.
-    vm_state_description! {
-        VMSTATE,
-        name: c"name",
-        unmigratable: true,
-    }
-
-    #[repr(C)]
-    pub struct DummyState {
-        pub char_backend: CharBackend,
-        pub migrate_clock: bool,
-    }
-
-    declare_properties! {
-        DUMMY_PROPERTIES,
-            define_property!(
-                c"chardev",
-                DummyState,
-                char_backend,
-                unsafe { &qdev_prop_chr },
-                CharBackend
-            ),
-            define_property!(
-                c"migrate-clk",
-                DummyState,
-                migrate_clock,
-                unsafe { &qdev_prop_bool },
-                bool
-            ),
-    }
-
-    device_class_init! {
-        dummy_class_init,
-        props => DUMMY_PROPERTIES,
-        realize_fn => None,
-        reset_fn => None,
-        vmsd => VMSTATE,
-    }
-}