matrix-rust-sdk

/// Initialize a tracing subscriber if the target architecture is not WASM.

///

/// Uses a sensible default filter that can be overridden through the `RUST_LOG`

/// environment variable and runs once before all tests by using the [`ctor`]

/// crate.

///

/// Invoke this macro once per compilation unit (`lib.rs`, `tests/*.rs`,

/// `tests/*/main.rs`).

#[macro_export]

macro_rules! init_tracing_for_tests {

    () => {

        #[cfg(not(target_family = "wasm"))]

        #[$crate::__macro_support::ctor]

        fn init_logging() {

            use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};

            use $crate::__macro_support::tracing_subscriber;

            tracing_subscriber::registry()

                .with(tracing_subscriber::EnvFilter::try_from_default_env().unwrap_or_else(|_| {

                    // Output is only printed for failing tests, but still we shouldn't overload

                    // the output with unnecessary info. When debugging a specific test, it's easy

                    // to override this default by setting the `RUST_LOG` environment variable.

                    //

                    // Since tracing_subscriber does prefix matching, the `matrix_sdk=` directive

                    // takes effect for all the main crates (`matrix_sdk_base`, `matrix_sdk_crypto`

                    // and so on).

                    "info,matrix_sdk=debug".into()

                }))

                .with(tracing_subscriber::fmt::layer().with_test_writer())

                .init();

        }

    };

}

#[doc(hidden)]

pub mod __macro_support {

    #[cfg(not(target_family = "wasm"))]

    pub use ctor::ctor;

    #[cfg(not(target_family = "wasm"))]

    pub use tracing_subscriber;

}