kata-ctl: add unit test for kvm check

Check that kvm test fails when run as non-root and when device specified
is not /dev/kvm.

Fixes #5338

Signed-off-by: Chelsea Mafrica <chelsea.e.mafrica@intel.com>

src/tools/kata-ctl/src/check.rs

@@ -395,6 +395,7 @@ mod tests {
     use std::fs;
     use std::io::Write;
     use tempfile::tempdir;
+    use test_utils::skip_if_root;
 
     #[test]
     fn test_get_single_cpu_info() {
@@ -522,6 +523,16 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_check_kvm_is_usable_generic() {
+        skip_if_root!();
+        #[allow(dead_code)]
+        let result = check_kvm_is_usable_generic();
+        assert!(
+            result.err().unwrap().to_string() == "Will not perform kvm checks as non root user"
+        );
+    }
+
     #[test]
     fn test_get_kata_all_releases_by_url() {
         #[derive(Debug)]