Function capture_tracing_output_at 

pub fn capture_tracing_output_at(max_level: Level, f: impl FnOnce()) -> String

Like capture_tracing_output, but capturing every level up to and including max_level (e.g. tracing::Level::DEBUG).

Needed to positively assert a tracing::debug! line fired, or that a tracing::warn! specifically (as opposed to any level) did not — capture_tracing_output’s fixed INFO filter makes both assertions vacuous, since a debug! call is invisible there regardless of whether the code under test emits it correctly.

Examples

use deps_core::test_util::capture_tracing_output_at;

let output =
    capture_tracing_output_at(tracing::Level::DEBUG, || tracing::debug!("quiet detail"));
assert!(output.contains("quiet detail"));