diff --git a/services/commtest/tests/backup_test.rs b/services/commtest/tests/backup_test.rs
--- a/services/commtest/tests/backup_test.rs
+++ b/services/commtest/tests/backup_test.rs
@@ -1,10 +1,126 @@
+#[path = "./backup/add_attachments.rs"]
+mod add_attachments;
+#[path = "./backup/backup_utils.rs"]
+mod backup_utils;
+#[path = "./backup/create_new_backup.rs"]
+mod create_new_backup;
+#[path = "./backup/pull_backup.rs"]
+mod pull_backup;
+#[path = "./backup/send_log.rs"]
+mod send_log;
 #[path = "./lib/tools.rs"]
 mod tools;
 
+use backup_utils::{BackupData, Item};
+use bytesize::ByteSize;
+use tools::get_grpc_chunk_size_limit;
 use tools::Error;
 
+use backup_utils::BackupServiceClient;
+
 #[tokio::test]
 async fn backup_test() -> Result<(), Error> {
-  assert!(false, "not implemented");
+  let mut client =
+    BackupServiceClient::connect("http://localhost:50052").await?;
+
+  let mut backup_data = BackupData {
+    user_id: "user0000".to_string(),
+    device_id: "device0000".to_string(),
+    backup_item: Item::new(
+      String::new(),
+      vec![ByteSize::mib(1).as_u64() as usize; 6],
+      vec![
+        "holder1".to_string(),
+        "holder2".to_string(),
+        "holder3".to_string(),
+      ],
+    ),
+    log_items: vec![
+      Item::new(String::new(), vec![ByteSize::b(100).as_u64() as usize], vec!["holder1".to_string()]),
+      Item::new(
+        String::new(),
+        vec![ByteSize::kb(400).as_u64() as usize],
+        vec!["holder2".to_string(), "holder3".to_string()],
+      ),
+      Item::new(
+        String::new(),
+        vec![get_grpc_chunk_size_limit(), get_grpc_chunk_size_limit()],
+        vec![
+          "holder1".to_string(),
+          "holder2".to_string(),
+          "holder3".to_string(),
+        ],
+      ),
+    ],
+  };
+  backup_data.backup_item.id =
+    create_new_backup::run(&mut client, &backup_data).await?;
+  println!("backup id in main: {}", backup_data.backup_item.id);
+
+  add_attachments::run(&mut client, &backup_data, None).await?;
+
+  for log_index in 0..backup_data.log_items.len() {
+    backup_data.log_items[log_index].id =
+      send_log::run(&mut client, &backup_data, log_index).await?;
+    add_attachments::run(&mut client, &backup_data, Some(log_index)).await?;
+  }
+
+  let result = pull_backup::run(&mut client, &backup_data).await?;
+
+  // check backup size
+  let expected: usize = backup_data.backup_item.chunks_sizes.iter().sum();
+  let from_result: usize = result.backup_item.chunks_sizes.iter().sum();
+  assert_eq!(
+    from_result, expected,
+    "backup sizes do not match, expected {}, got {}",
+    expected,
+    from_result
+  );
+
+  // check backup attachments
+  let expected: usize = backup_data.backup_item.attachments_holders.len();
+  let from_result: usize = result.backup_item.attachments_holders.len();
+  assert_eq!(
+    from_result, expected,
+    "backup: number of attachments holders do not match, expected {}, got {}",
+    expected,
+    from_result
+  );
+
+  // check number of logs
+  let expected: usize = backup_data.log_items.len();
+  let from_result: usize = result.log_items.len();
+  assert_eq!(
+    expected, from_result,
+    "number of logs do not match, expected {}, got {}",
+    expected,
+    from_result
+  );
+
+  // check log sizes
+  for i in 0..backup_data.log_items.len() {
+    let expected: usize = backup_data.log_items[i].chunks_sizes.iter().sum();
+    let from_result: usize = result.log_items[i].chunks_sizes.iter().sum();
+    assert_eq!(
+      from_result, expected,
+      "log number {} sizes do not match, expected {}, got {}",
+      i,
+      expected,
+      from_result
+    );
+  }
+  // check logs attachments
+  for i in 0..backup_data.log_items.len() {
+    let expected: usize = backup_data.log_items[i].attachments_holders.len();
+    let from_result: usize = result.log_items[i].attachments_holders.len();
+    assert_eq!(
+      from_result, expected,
+      "log {}: number of attachments holders do not match, expected {}, got {}",
+      i,
+      expected,
+      from_result
+    );
+  }
+
   Ok(())
 }