Have you had experience developing or executing end-to-end tests to verify the complete user scenario?

Yes, in Golang, frameworks that allow running full user scenarios, including interaction with APIs, databases, and external services, are often used for end-to-end testing. For example, you can write a test that sends HTTP requests to your application and checks the responses, simulating user behavior.

Here's a simple example of an end-to-end test using the standard net/http and testing packages:

package main

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

func TestEndToEnd(t *testing.T) {
    // Create a test HTTP server with your handler
    handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte("Hello, user!"))
    })
    server := httptest.NewServer(handler)
    defer server.Close()

    // Perform an HTTP request, simulating a user
    resp, err := http.Get(server.URL)
    if err != nil {
        t.Fatalf("Failed to send request: %v", err)
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        t.Errorf("Expected status 200 OK, got %d", resp.StatusCode)
    }
}

In real projects, more advanced tools like godog for BDD or chromedp for UI testing in browsers can be used.