Function capture_tracing_output 

pub fn capture_tracing_output(f: impl FnOnce()) -> String

Captures tracing output emitted synchronously during f into a String.

Lets a test assert a tracing::warn!/info! call actually fired — e.g. crate::lsp_helpers::warn_rejected_value — without a real logging sink or a network-dependent end-to-end path. Filters below INFO, so a tracing::debug!/trace! emission never appears here — use capture_tracing_output_at for those.

Examples

use deps_core::test_util::capture_tracing_output;

let output = capture_tracing_output(|| tracing::warn!("something rejected"));
assert!(output.contains("something rejected"));