package middleware

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestTrace(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	var executed bool
	var handler http.Handler = Trace(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		executed = true
		w.WriteHeader(http.StatusOK)
	}))

	req, err := http.NewRequest("GET", "/", nil)
	if err != nil {
		t.Fatalf("error when creating request: %v", err)
	}
	req = req.WithContext(ctx)

	rw := httptest.NewRecorder()

	handler.ServeHTTP(rw, req)

	if !executed {
		t.Fatal("middleware Trace doesn't pass through to underlying handler")
	}
}