How do you test an HTTP server with live requests in Go using httptest.Server?

Testing an HTTP Server with Live Requests in Go

Live testing an HTTP server allows you to verify the functionality of your endpoints in a real-world environment. This approach is particularly useful when your server relies on external services or uses complex routing logic.

Using net/http/httptest.Server for Live Testing

The net/http/httptest.Server type in the Go standard library provides a way to create a live HTTP server for testing purposes. Here's how you can use it:

<code class="go">// Create a router that will be used for testing.
router := mux.NewRouter()

// Create a test server using the router.
ts := httptest.NewServer(router)

// Send test requests to the server.
newreq := func(method, url string, body io.Reader) *http.Request {
    r, err := http.NewRequest(method, url, body)
    if err != nil {
        t.Fatal(err)
    }
    return r
}

tests := []struct {
    name string
    r    *http.Request
}{
    {name: "1: testing get", r: newreq("GET", ts.URL+"/", nil)},
    {name: "2: testing post", r: newreq("POST", ts.URL+"/", nil)},
}

for _, tt := range tests {
    t.Run(tt.name, func(t *testing.T) {
        resp, err := http.DefaultClient.Do(tt.r)
        defer resp.Body.Close()
        if err != nil {
            t.Fatal(err)
        }
        // Check for expected response.
    })
}</code>

In this example, we create a Gorilla mux router and then use httptest.NewServer to create a live server using that router. We define some test requests and send them to the server using the http.DefaultClient. We can then verify the responses received from the server to ensure that they match our expectations.

Note: While the question specifically mentions Gorilla mux, the approach described here is applicable to any router that satisfies the http.Handler interface.

The above is the detailed content of How do you test an HTTP server with live requests in Go using httptest.Server?. For more information, please follow other related articles on the PHP Chinese website!