Merge branch 'main' into exemplars-opentelemetry

autometrics/tests/exemplars_test.rs

@@ -1,6 +1,6 @@
 #![cfg(feature = "prometheus-exporter")]
 
-use autometrics::{autometrics, encode_global_metrics, global_metrics_exporter};
+use autometrics::{autometrics, prometheus_exporter};
 use tracing::instrument;
 use tracing_subscriber::prelude::*;
 
@@ -56,14 +56,18 @@ fn multiple_fields() {
 #[test]
 fn opentelemetry_context() {
     use opentelemetry_api::trace::Tracer;
-    let _ = global_metrics_exporter();
+    prometheus_exporter::init();
 
     #[autometrics]
     fn opentelemetry_context_fn() {}
 
     let tracer = opentelemetry_sdk::export::trace::stdout::new_pipeline().install_simple();
     tracer.in_span("my_span", |_cx| opentelemetry_context_fn());
 
-    let metrics = encode_global_metrics().unwrap();
-    println!("{}", metrics);
+    let metrics = prometheus_exporter::encode_to_string().unwrap();
+    assert!(metrics.lines().any(|line| {
+        line.starts_with("function_calls_count_total{")
+            && line.contains(r#"function="opentelemetry_context_fn""#)
+            && (line.contains(r#"trace_id=""#) || line.contains(r#"span_id=""#))
+    }))
 }