test(kms): use absolute fixture paths on Windows

crates/kms/src/api_types.rs

@@ -917,9 +917,10 @@ mod tests {
 
     #[test]
     fn test_configure_request_development_defaults_require_opt_in() {
+        let key_dir = std::env::temp_dir().join("kms-key-dir");
         let local_raw = serde_json::json!({
             "backend_type": "local",
-            "key_dir": "/tmp/kms-key-dir"
+            "key_dir": key_dir
         });
         let request: ConfigureKmsRequest = serde_json::from_value(local_raw).expect("local request should deserialize");
         let config = request.to_kms_config();
@@ -927,7 +928,7 @@ mod tests {
 
         let local_opt_in_raw = serde_json::json!({
             "backend_type": "local",
-            "key_dir": "/tmp/kms-key-dir",
+            "key_dir": key_dir,
             "allow_insecure_dev_defaults": true
         });
         let request: ConfigureKmsRequest = serde_json::from_value(local_opt_in_raw).expect("local request should deserialize");

crates/kms/src/config.rs

@@ -1608,10 +1608,14 @@ mod tests {
         assert!(config.validate().is_err());
         assert!(config.with_insecure_development_defaults().validate().is_ok());
 
+        #[cfg(windows)]
+        let production_key_dir = PathBuf::from(r"C:\rustfs\kms");
+        #[cfg(not(windows))]
+        let production_key_dir = PathBuf::from("/var/lib/rustfs/kms");
         let production_config = KmsConfig {
             backend: KmsBackend::Local,
             backend_config: BackendConfig::Local(LocalConfig {
-                key_dir: PathBuf::from("/var/lib/rustfs/kms"),
+                key_dir: production_key_dir,
                 master_key: Some("production-master-key".to_string()),
                 file_permissions: Some(0o600),
             }),

crates/kms/tests/behavior_lifecycle.rs

@@ -336,7 +336,11 @@ async fn invalid_configurations_are_rejected_before_anything_starts() {
     assert_configuration_error(relative.validate(), "must be an absolute path");
 
     // Production-shaped Local config: no master key is refused without opt-in.
-    let production_without_master_key = KmsConfig::local("/var/lib/rustfs/kms-behavior".into());
+    #[cfg(windows)]
+    let production_key_dir = r"C:\rustfs\kms-behavior";
+    #[cfg(not(windows))]
+    let production_key_dir = "/var/lib/rustfs/kms-behavior";
+    let production_without_master_key = KmsConfig::local(production_key_dir.into());
     assert_configuration_error(production_without_master_key.validate(), "requires a master key");
 
     // ...and so is a key directory under the process temp dir.