feat(admin): implement handler for delete group (#1901)

Signed-off-by: Niraj Yadav <niryadav@redhat.com>
Signed-off-by: heihutu <30542132+heihutu@users.noreply.github.com>
Co-authored-by: heihutu <30542132+heihutu@users.noreply.github.com>
Co-authored-by: yxrxy <yxrxytrigger@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: 安正超 <anzhengchao@gmail.com>

crates/e2e_test/src/group_delete_test.rs

@@ -0,0 +1,76 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::common::{RustFSTestEnvironment, awscurl_delete, awscurl_get, awscurl_put, init_logging};
+use serial_test::serial;
+use tracing::info;
+
+/// Test that deleting a group with members fails, and deleting an empty group succeeds.
+#[tokio::test(flavor = "multi_thread")]
+#[serial]
+#[ignore = "requires awscurl and spawns a real RustFS server"]
+async fn test_delete_group_requires_empty_membership() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.start_rustfs_server(vec![]).await?;
+
+    // 1. Create a user
+    let add_user_url = format!("{}/rustfs/admin/v3/add-user?accessKey=testuser1", env.url);
+    let user_body = serde_json::json!({
+        "secretKey": "testuser1secret",
+        "status": "enabled"
+    });
+    awscurl_put(&add_user_url, &user_body.to_string(), &env.access_key, &env.secret_key).await?;
+    info!("Created testuser1");
+
+    // 2. Create a group with testuser1 as a member
+    let update_members_url = format!("{}/rustfs/admin/v3/update-group-members", env.url);
+    let add_member_body = serde_json::json!({
+        "group": "testgroup",
+        "members": ["testuser1"],
+        "isRemove": false,
+        "groupStatus": "enabled"
+    });
+    awscurl_put(&update_members_url, &add_member_body.to_string(), &env.access_key, &env.secret_key).await?;
+    info!("Added testuser1 to testgroup");
+
+    // 3. Attempt to delete the group while it still has members — should fail
+    let delete_group_url = format!("{}/rustfs/admin/v3/group/testgroup", env.url);
+    let delete_result = awscurl_delete(&delete_group_url, &env.access_key, &env.secret_key).await;
+    assert!(delete_result.is_err(), "deleting a non-empty group should fail");
+    info!("Delete of non-empty group correctly rejected");
+
+    // 4. Remove the member from the group
+    let remove_member_body = serde_json::json!({
+        "group": "testgroup",
+        "members": ["testuser1"],
+        "isRemove": true,
+        "groupStatus": "enabled"
+    });
+    awscurl_put(&update_members_url, &remove_member_body.to_string(), &env.access_key, &env.secret_key).await?;
+    info!("Removed testuser1 from testgroup");
+
+    // 5. Delete the now-empty group — should succeed
+    awscurl_delete(&delete_group_url, &env.access_key, &env.secret_key).await?;
+    info!("Deleted empty testgroup successfully");
+
+    // 6. Verify the group no longer exists
+    let get_group_url = format!("{}/rustfs/admin/v3/group?group=testgroup", env.url);
+    let get_result = awscurl_get(&get_group_url, &env.access_key, &env.secret_key).await;
+    assert!(get_result.is_err(), "group should no longer exist after deletion");
+    info!("Confirmed testgroup no longer exists");
+
+    Ok(())
+}

crates/e2e_test/src/lib.rs

@@ -75,3 +75,7 @@ mod cluster_concurrency_test;
 // PutObject / MultipartUpload with checksum (Content-MD5, x-amz-checksum-*)
 #[cfg(test)]
 mod checksum_upload_test;
+
+// Group deletion tests
+#[cfg(test)]
+mod group_delete_test;