the test span library provides you with two functions:
get_logs() that returns [prelude::Records]
get_span() that returns a [prelude::Span],
Which can be serialized and used with insta for snapshot tests.
Refer to the tests.rs file to see how it behaves.
Example:
#[test_span]
async fn test_it_works() {
futures::join!(do_stuff(), do_stuff())
}
#[tracing::instrument(name = "do_stuff", level = "info")]
async fn do_stuff() -> u8 {
// ...
do_stuff2().await;
}
#[tracing::instrument(
name = "do_stuff2",
target = "my_crate::an_other_target",
level = "info"
)]
async fn do_stuff_2(number: u8) -> u8 {
// ...
}
`get_span()` will provide you with:
┌──────┐
│ root │
└──┬───┘
│
┌───────┴───────┐
▼ ▼
┌──────────┐ ┌──────────┐
│ do_stuff │ │ do_stuff │
└────┬─────┘ └─────┬────┘
│ │
│ │
▼ ▼
┌───────────┐ ┌───────────┐
│ do_stuff2 │ │ do_stuff2 │
└───────────┘ └───────────┘