[PATCH 6/6] start-vmm: test GPU socket configuration

[colbyt <colby@colbyt.com>]

Extend the basic VM command test to assert that GPU configuration
includes the expected crosvm vhost-user GPU socket path.

This adds coverage for the generated GPU service wiring without
requiring a full VM boot.

Signed-off-by: colbyt <colby@colbyt.com>
---
 tools/start-vmm/tests/vm_command-basic.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/start-vmm/tests/vm_command-basic.rs b/tools/start-vmm/tests/vm_command-basic.rs
index 2e9ad0c..80937ef 100644
--- a/tools/start-vmm/tests/vm_command-basic.rs
+++ b/tools/start-vmm/tests/vm_command-basic.rs
@@ -32,6 +32,11 @@ fn main() -> std::io::Result<()> {
     let expected =
         "/run/service/vm-services/instance/testvm/data/service/vhost-user-fs/env/virtiofsd.sock";
     assert_eq!(fs1.socket, expected);
+    assert_eq!(config.gpu.len(), 1);
+    let gpu1 = &config.gpu[0];
+    let expected =
+        "/run/service/vm-services/instance/testvm/data/service/vhost-user-gpu/env/crosvm.sock";
+    assert_eq!(gpu1.socket, expected);
     assert_eq!(PathBuf::from(config.payload.kernel), kernel_path);
     #[cfg(target_arch = "x86_64")]
     assert_eq!(config.payload.cmdline, "console=ttyS0 root=PARTLABEL=root");
-- 
2.54.0