The API allows adding tags with empty labels (names) and duplicate tags

[josecelano]

Check these tests:

#[tokio::test]
async fn it_should_allow_adding_duplicated_tags() {
    // code-review: is this an intended behavior?

    let mut env = TestEnv::new();
    env.start(api::Version::V1).await;

    // Add a tag
    let random_tag_name = random_tag_name();
    let response = add_tag(&random_tag_name, &env).await;
    assert_eq!(response.status, 200);

    // Try to add the same tag again
    let response = add_tag(&random_tag_name, &env).await;
    assert_eq!(response.status, 200);
}

#[tokio::test]
async fn it_should_allow_adding_a_tag_with_an_empty_name() {
    // code-review: is this an intended behavior?

    let mut env = TestEnv::new();
    env.start(api::Version::V1).await;

    let empty_tag_name = String::new();
    let response = add_tag(&empty_tag_name, &env).await;
    assert_eq!(response.status, 200);
}