fix failing test

go-kit/metrics/provider/otel/options.go

@@ -29,7 +29,7 @@ var (
 
 const (
 	// DefaultAgentEndpoint is a default exporter endpoint that points to a local otel collector.
-	DefaultAgentEndpoint = "0.0.0.0:55680"
+	DefaultAgentEndpoint = "http://0.0.0.0:55680"
 
 	// If you are encountering this error it means that you are attempting to
 	// establish an aggregation selection (explicit, or exponential) after you have

go-kit/metrics/provider/otel/provider_test.go

@@ -2,17 +2,21 @@ package otel
 
 import (
 	"context"
+	"runtime/debug"
 	"testing"
 )
 
 func TestNewCardinalityCounter_InsertDoesNotPanic(t *testing.T) {
 	defer func() {
 		if r := recover(); r != nil {
-			t.Errorf("The code did panic")
+			t.Errorf("The code did panic: %#v\n %s", r, string(debug.Stack()))
 		}
 	}()
 
-	p, _ := New(context.Background(), "my-service")
+	p, err := New(context.Background(), "my-service")
+	if err != nil {
+		t.Errorf("failed to start metrics provider: %s", err)
+	}
 	c := p.NewCardinalityCounter("my-counter")
 
 	c.Insert([]byte("hey"))