provide-telemetry 0.3.0

Cross-language telemetry helpers with privacy, resilience, and OTLP support.
Documentation 
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// SPDX-FileCopyrightText: Copyright (C) 2026 provide.io llc
// SPDX-License-Identifier: Apache-2.0
// SPDX-Comment: Part of provide-telemetry.
//

use provide_telemetry::context::{bind_context, get_context};
use provide_telemetry::health::{get_health_snapshot, record_export_failure};
use provide_telemetry::sampling::Signal;
use provide_telemetry::testing::{reset_telemetry_state, reset_trace_context};
use provide_telemetry::tracer::{get_trace_context, set_trace_context};
use serde_json::json;
use std::sync::{Mutex, OnceLock};

static TEST_LOCK: OnceLock<Mutex<()>> = OnceLock::new();

fn test_lock() -> &'static Mutex<()> {
    TEST_LOCK.get_or_init(|| Mutex::new(()))
}

#[test]
fn testing_test_reset_telemetry_state_clears_context_and_health() {
    let _guard = test_lock().lock().expect("test lock poisoned");
    let _context_guard = bind_context([("user_id", json!("u1"))]);
    record_export_failure(Signal::Logs);

    assert_eq!(get_context().get("user_id"), Some(&json!("u1")));
    assert_eq!(get_health_snapshot().export_failures_logs, 1);

    reset_telemetry_state();

    assert!(!get_context().contains_key("user_id"));
    assert_eq!(get_health_snapshot().export_failures_logs, 0);
}

#[test]
fn testing_test_reset_trace_context_clears_manually_set_trace_context() {
    let _guard = test_lock().lock().expect("test lock poisoned");
    let _trace_guard = set_trace_context(Some("abc123".to_string()), Some("def456".to_string()));
    assert_eq!(
        get_trace_context()
            .get("trace_id")
            .and_then(|value: &Option<String>| value.clone()),
        Some("abc123".to_string())
    );

    reset_trace_context();

    assert_eq!(
        get_trace_context()
            .get("trace_id")
            .and_then(|value: &Option<String>| value.clone()),
        None
    );
}

#[test]
fn testing_test_reset_helpers_are_idempotent() {
    let _guard = test_lock().lock().expect("test lock poisoned");
    reset_telemetry_state();
    reset_telemetry_state();
    reset_trace_context();
    reset_trace_context();
}